Application of PIV to characterise the Flow- Phenomena of a Heavy-Duty Cylinder Head on a Stationary Flow-Bench
|
|
- Valerie Park
- 5 years ago
- Views:
Transcription
1 Application of PIV to characterise the Flow- Phenomena of a Heavy-Duty Cylinder Head on a Stationary Flow-Bench E. Doosje 1, R.J.M. Bastiaans, R.S.G. Baert Eindhoven University of Technology Abstract With modern heavy-duty diesel engines the design of the inlet ports in the cylinder head is such that some degree of swirling motion is induced in the engine cylinders during intake. This swirling motion is mostly characterized using a stationary flow bench. In such a flow bench, a dummy cylinder is used instead of the cylinder in the engine. In this situation there is no moving piston, the air can flow out of the open end of the dummy cylinder. To measure the intensity of the swirling motion a swirl-torquemeter is used. This swirl-torquemeter is a flow rectifier, which is placed in the dummy cylinder. The restraining torque on the flow rectifier is a measure of the momentum in the flow. Simulations of the flow in the cylinder indicate that the flow is influenced by the flow-rectifier in such a way that the measured values can be questioned. One of the objectives in this research is to find out if this influence exists. To do this, the velocity field in the cylinder is measured using Particle Image Velocimetry (PIV). From the velocity measurements, the swirl was calculated and compared to the swirl measured using a swirl-torquemeter. The validity of the assumptions made when using a swirl-torquemeter was evaluated from the velocity fields. Last, turbulence characteristics were determined and a spectrum was made. 1 Introduction In diesel engines, the motion of the charge is used to promote the mixing of fuel and air in the combustion chamber at the moment the fuel is injected ([3],[4]). In heavy-duty engines (e.g. truck applications or stationary power generation) a rotating air motion is used. This air motion is called swirl. The axis of rotation is parallel to the cylinder axis, but does not necessarily coincide with it. To measure the rotational speed of this air motion different methods are applied. In the industry so called swirl-torquemeters are commonly used. These measurements are performed on a flow-bench rather than in a running engine. On such a flow-bench the cylinder head to be measured is placed in normal or upside-down orientation; a 1 Corresponding author, e.doosje@tue.nl
2 3 Session 5 dummy cylinder is placed instead of the normal engine liner. There is no moving piston in this situation; the air can flow out of the open end of the cylinder. The swirl-torquemeter is then placed on the open end of the dummy cylinder. The swirl-torquemeter consists of a flow-rectifier, which straightens the rotating flow (Fig. 1). This flow straightening causes a reaction torque on the flow-rectifier. This torque is equal to the angular momentum-flux in the flow. The angular momentum-flux I & can be calculated using = π R I & ρ v v r drdϕ, in which vax and vtan are the axial and tangential velocity components and r the radius. ax tan Fig. 1. Swirl-torquemeter principle of operation [7]. If one assumes a certain flow-profile and moment of inertia, the measured torque can be converted to an angular rotation speed. For swirl measurements, a so-called solid-body rotation is assumed for this purpose. With this assumption the tangential velocity component v tan is proportional to the radius r, v = ω r, in which ω is the angular velocity of the charge. The axial velocity tan component vax is assumed constant in the cylinder. Assuming also a constant density ρ, the rotational speed can be calculated from ω r =. In this equa- M m & Rcyl tion, M is the measured torque, m& is the mass flow and R cyl is the radius of the cylinder.
3 Turbulence and PTV 33 In this research, PIV was applied to measure a D velocity-field at the location in the cylinder, where normally the swirl-torquemeter would be placed. The resulting velocity-field was used to calculate the reaction torque that a swirltorquemeter would measure. This calculated torque was then compared to the readings from a swirl-torquemeter, measured on a reference flow-bench using the same cylinder head. The objectives of this study can be summarized as follows: 1. To obtain insight on the flow-phenomena in a stationary flow bench application.. To test the solid-body assumption used in swirl measurement practice. 3. To try and predict angular swirl momentum from PIV measurements and compare these with readings from a swirl-torquemeter. 4. To check on influence of the swirl-torquemeter on the flow. 5. To analyse the flow turbulence. Experimental Set-up.1 Flow-bench In order to use the PIV technique, a dedicated stationary flow-bench was built in which the dummy cylinder was replaced by a glass cylinder. The dimensions were kept equal to the cylinder used in the reference flow-bench. The flow through the set-up was controlled in such a way, that the pressure drop over the inlet section is kept constant (Fig. ). This pressure drop, measured between the inlet manifold and the dummy cylinder, was set to 1 kpa. A compressed air system was used for the air supply. The air, which was seeded for the PIV measurements, was extracted from the set-up and filtered before releasing it back into the atmosphere. The maximum airflow used was approx. 7 m n3 /h. The cylinder head used is a modern, 4-valve type with two inlet and two exhaust valves.. Seeding To achieve the necessary seeding density for the PIV measurements, different devices have been tested. A simple nozzle-type device was found to perform best and was used in the measurements. Also, different seeding materials were tested. Titanium dioxide was found to perform best. The material used was commercially available TiO, and had a mean diameter of around 1 µm. This material was mixed with approx. 1 mass percent of larger particles (i.e. TiO with a diameter of 6 µm) to prevent clogging of the material in the nozzle. The seeding supply was controlled by manually regulating the amount of seeding. Because the imaging diameter of the particles is diffraction limited, it is not possible to distinguish between the small and large particles at the time of evalua-
4 34 Session 5 tion. The number of larger particles, however, is small compared to the total number of particles. This means that the error due to the bad following behaviour of the large particles is small. Compressed air Air extraction controlsignal Camera measurementsignal Optical access Pressure relief 7.5 => 3 bar Buffer m 3 p=3 bar (constant) MFM Seeding introduction Flow Control valve rectifier DPM Measurement plane Cylinder 1.75*B Cylinder head valveactuator laboratory + Setpoint dp (preset) - PID delta p + Setpoint flow (fluctuates) - PID flow DPM : Differential Pressure Meter MFM : Mass Flow Meter Fig.. Flow set-up..3 PIV-system A double-cavity ND-YAG laser (Continuum Surelite) with a pulse energy of mj was used. The maximum repetition frequency was 1 Hz, the pulse duration 9 ns. To form a light sheet, a single spherical positive lens and a single negative cylindrical lens were used. The sheet thickness was approx. 1.5 mm. The camera used was a Kodak ES 1. CCD camera, with a CCD of 18x118 pixels. A 53 nm filter was used to prevent ambient light from entering the camera. The images were recorded with a Dantec FlowMap processor, which calculated the raw vector maps by cross-correlation processing. The time between frames was set to 1 µs. Further validation and analysis was done using various routines written with Matlab. The recorded images were stored on disk to analyse these later using different interrogation methods. The data transfer speed of the PIV system at which the images are transmitted limits the measurement frequency to one velocity field every two seconds. This relatively large interval assures that the velocity fields are statistically independent, which is important for the present turbulence analysis. Because the seeding quantity was regulated manually, it was not possible to keep the seeding density sufficiently high. Therefore, an interrogation area size of 64x64 pixels was used. For selected images, it was possible to use an area of 3x3 pixels, however to obtain sufficient velocity fields for averaging, all image sets were initially processed using a 64 pixel interrogation area. Since 5% overlap was used, there are 3x3 vectors in the velocity field.
5 Turbulence and PTV 35 3 Measurements The measurement section was located 1.75 times the cylinder-bore B downstream from the cylinder head. Measurements were performed in a plane perpendicular to the cylinder axis. The flow rate was set by adjusting the valve lift and keeping the pressure drop constant. For comparison of the calculated torque to the torque measured with an impulse swirl meter, the flow rate must be the same in both sets of experiments. To check this, the flow rate was compared to a reference measurement of the same cylinder head on a different flow bench and was found to be nearly equal. Measurements were performed for different valve lifts ranging from % to 95% of the full span. For each valve lift setting, PIV measurements were made until approximately 15 image sets were acquired. After manual rejection of the image-sets with a low seeding density, approximately 1 raw velocity fields were available for validation and analysis. At a later stage, the light sheet was rotated by 9 degrees, so the velocity field in the vertical plane through the cylinder centre could be measured. This measurement was performed for a free outflow (the same situation as the previous measurement). A flow-rectifier was then placed in the cylinder to simulate the presence of a swirl-torquemeter, and the measurement was repeated to see the effect on the velocity field. 4 Validation methods To validate the raw velocity fields and remove spurious vectors, various routines in Matlab were used. The total number of outliers was about -5%, depending on the flow conditions. Three criteria for validation were applied: 4.1 Absolute length of a velocity vector A normal distribution was assumed for the ensemble of the length of all vectors in the field. Vectors that have a length deviation of more than 3 times the standard deviationσ were rejected. After rejection of these vectors, a new mean and standard deviation were calculated. This process was repeated until all remaining vectors were within the mean plus or minus 3 times the standard deviation σ. Calculating this distribution for all vectors at a certain grid-location during a time interval would statistically be more correct, however the result is nearly the same since spurious vectors caused by correlation errors are found far from the mean. A distribution plot of all initial raw vectors confirms this. Using the same preset limit value for all fields is very difficult, since the mean velocities are not the same.
6 36 Session 5 4. Peakheight-ratio The ratio of the heights of the first and second peak was taken to be >1.5. This threshold value has been selected based on experience from earlier measurements. 4.3 Deviation of a velocity vector relative to the local median For each vector, a local median was determined using a number of layers around the vector (e.g. a median for 3x3, or 5x5 vectors). Relative to this local median, a deviation in velocity magnitude and direction was calculated. A separate threshold was set for the deviation in magnitude and direction, and vectors were rejected according to this threshold. The use of the local median is preferred over the local mean; in areas with many spurious vectors (for instance due to a low seeding density) the local mean is not representative [8]. These validation methods were applied in the order described. When the order of the validation methods is altered, the first step always removes the most invalid vectors. Rejected vectors were replaced by an interpolation from neighbouring vectors. 5 Results Two examples of single velocity fields can be seen in Fig. 3. Limitations of the PIV equipment limit the measurement frequency to one velocity field every two seconds. These velocity fields are clearly snapshots of the flow, since they are very different. It can be seen that the flow is very unstable. The circles in the figures indicate the position of the inlet valves, when viewed from the cylinder side and are printed there for orientation in comparisons with CFD calculations m/s 6 1 m/s 6 6 x [mm] 6 6 x [mm] Fig. 3. Instantaneous velocity fields, valve lift 8%.
7 Turbulence and PTV 37 Since the swirl-torquemeter has certain size and mass, the torque it measures is due to some time average of the velocity fields it straightens. When the velocity fields for a valve lift of 8% are averaged in time, the field in Fig. 4 results. Vectorveld (smoothed), lift: 1 mm m/s 6 1 m/s 6 6 x [mm] 6 6 x [mm] Fig. 4. Time averaged field, Fig. 5. Time averaged field, valve lift 8%. valve lift % m/s 6 1 m/s [ ] Fig. 6. Time averaged field, Fig. 7. Time averaged field, valve lift 6%. valve lift 95%. In Figs. 5 to 7, three more time averaged velocity fields are shown; the valve lifts are, 6 and 95% respectively. It can be seen that for lower valve lifts and therefore lower mass flow rate the motion of the air is less like a solid body rotation. At lower valve lifts the centre of rotation is shifted from the cylinder centre and the tangential velocity component has changed direction in a part of the field. The arrows in the figures are scaled in the same way so the magnitude of the velocity can be compared easily.
8 38 Session 5 6 Torque Calculations and Comparison The integral equation for calculating the torque or angular momentum-flux I &, = π R I & ρ vax vtan r drdϕ can be approximated using the following summation on the interrogation areas: I & = π R ρ v ax ρ vax vtan r drdϕ = m& vtan rdxdy = m& vtan r drdϕ ( v x u y) dxdy r, ϕ x, y x, y This summation is calculated for all interrogation areas within the cylinder perimeter. Assuming a constant axial velocity and density, the local values do not need to be known. Measuring the total mass flow rate is sufficient. In Fig. 8, this torque calculation is shown for a measurement series of one valve lift setting (65% lift). The line in the figure is the running average of the calculated torque values, whereas the stars are the instantaneous torque values themselves. It can be seen that the torque values from individual velocity fields show a large fluctuation. The average however, does take a rather constant value after about 5 velocity fields. Due to its mass and dimensions, the swirl-torquemeter is believed to measure the average of the torque induced by the flow field. Distribution/convergence calculated torque (v ax constant), lift: 65% Reference swirl-torquemeter PIV constant axial velocity PIV scaled axial velocity 6 1 Calculated torque [Nmm] torque [Nmm] Velocity field nr valve lift [%] Fig. 8. Torque calculation, Fig. 9. Torque comparison. valve lift 65%. In Fig. 9 the calculated torque is compared against the measured torque from a swirl-torquemeter. The calculated torque from PIV is substantially lower than the torque measured with the swirl-torquemeter. In the figure, lines for the calculated torque are drawn. The lower line, labelled PIV constant axial velocity, is the torque calculated using the equation above. Here, the axial velocity is assumed constant in the cylinder (a so-called plug-flow profile). The upper line, labelled
9 Turbulence and PTV 39 PIV scaled axial velocity, is calculated using a scaling of the axial velocity with the velocity in the measurement plane. This scaling is done in such a way that the total flow is the same as in the previous method. When using this scaling, the velocity vectors would make the same angle with the measurement plane. As can be seen, the torque calculated using this scaling is closer to the reference torque. More important, it shows that measuring only velocity components is insufficient for a good comparison between a swirl-torquemeter and the velocity measurements. One can calculate almost any torque by assuming some distribution of the axial velocity in the cylinder. The real flow is much more complicated than the solid-body profile assumption used in swirl measurement practice. 7 Tangential Velocity Profile To calculate a rotational speed from the measured torque when using a swirltorquemeter, a solid-body flow profile is assumed. In such a profile, the tangential velocity is proportional to the radius. In the time averaged velocity fields, the radial distribution of the tangential velocity is determined. The cylinder bore is divided in rings of equal width (Fig.1). After this, the tangential velocity is averaged within each ring. In Fig. 11 this distribution is plotted for a number of valve lifts. It is clear that the solid-body assumption is less valid at lower valve lifts (% and 6% valve lift). An ideal solid-body profile would yield a straight line. The distribution at larger valve lifts is closer to this (8% valve lift in the figure). 1 Tangential velocity 1 valve lift % valve lift 6% valve lift 8% 8 vtan [m/s] % of radius Fig. 1. Averaging tangential velocity. Fig. 11. Tangential velocity profiles.
10 31 Session 5 8 Flow field statistics As mentioned earlier, the flow field is very unstable. In most velocity fields, a rotating structure (vortex) can be identified. For every velocity field the location of the most prominent vortex was calculated using the following equation for the normalised angular momentum ([1], []): r r 1 u 1 Γ1 ( Px, y ) = sinϕ, (N + 1) x+ N y+ N i, j i, j = r r i= x N j= y N i, j ui, j + ( N 1) r r in which i, j is the position vector, u i, j the velocity vector and ϕ is the angle between these. The normalized angular momentum Γ 1 is calculated for each location P x, y. Γ 1 Can take on values between 1 and 1. This normalised angular momentum is derived from the velocity field topography and does not take the magnitude of the velocities in account. For N, the number of layers around the centre point P, a value of was used. When a plot is made for the distribution of the minimum and maximum value of Γ 1 and its location in the cylinder, one can see that for larger valve lift and therefore larger airflow there is less spread in the location of the maximum. In Fig. 1 and 13 a distribution for different valve lifts is shown. In these plots, Γ 1 values between.75 and.75 were rejected (the calculation of Γ 1 always yields a value, even in a parallel flow). i, j x [mm] x [mm] Fig. 1. Γ1 min(o)/max(*), Fig. 13. Γ1 min(o)/max(*), valve lift 6%. valve lift 8%. In Fig. 1, for 6% valve lift, it can be seen that there is a clear separation between left (o) and right (*) rotating vortices. At the right of the field, there is often a large vortex, at the left there is often a pair of smaller counter rotating vortices.
11 Turbulence and PTV 311 In Fig. 13, for 8% valve lift, the increased mass flow creates a dominant left rotating vortex, which has its centre of rotation closer to the cylinder centre. 9 Turbulence Characteristics To examine the energy involved in flow structures of different size, a Fourier analysis was performed. At a certain radius, a circle consisting of points was drawn. When one follows this circle, it can be viewed as a domain without boundaries. Along this circle, a Fourier analysis was performed on the tangential component of the velocity vectors. Since the velocity vectors are spaced on a cartesian grid, interpolation is used to find the velocities in the points on the circle. The standard Matlab function griddata was used to perform the interpolation. This interpolation has certain effects on the results of the following Fourier analysis. To compensate for these effects, a synthetic velocity field was created. This field consisted of the same Cartesian grid with on it a sinusoidal fluctuation in tangential velocity with known amplitude. The Fourier analysis was performed on this synthetic velocity field to see to which extent the energy can be found. It was found that for higher frequencies (wave numbers) the calculated energy from the Fourier analysis was lower than the known energy in the velocity field. The ratio of these two v ( k) / P( k) > 1was used to correct the Fourier analysis of the actual velocity fields. Of course, there is a limit in the frequency/wave number that can be used, which is determined by the grid spacing. The energy spectrum found this way is plotted in Fig. 14. When this analysis is performed on the velocity field at different valve lifts, the results differ slightly. In Fig. 15 these results are plotted. 1 8% lift TiO seeding 8% lift AlO3 seeding 1 λ=π/k 1 1.E+ 1.E+1 1.E+ 1.E-1 Power (corrected for interpolation) E(k)/(ν 5 ε) 1/4 1.E+6 1.E+5 53% lift 6% lift 1.E+4 7% lift 8% lift 9% lift 95% lift Ck= (-5/3 slope) 1.E+3 1.E-4 1.E-3 1.E- Fig. 14. Energy spectrum, Fig. 15. Scaled energy spectrum. valve lift 8%. kη
12 31 Session 5 The wave number axis is scaled with the Kolmogorov length η, the energy axis is scaled with the kinematic viscosity ν and dissipation rate ε. The dissipation rate ε can be estimated from ε = U 3, in which U is a mean velocity and L L a characteristic size of the domain (the cylinder bore). The Kolmogorov length η can be estimated from η = ν, in which ν is the kinematic viscosity. ε As can be seen in Fig. 15, the energy spectrum has the 5 slope, which is 3 characteristic for an inertial sub range. From E( k) = C 3k 3 kε, an estimate for the Kolmogorov constant Ck can be made. A line based on C k = [6] is plotted in Fig Conclusions 1. The flow in a stationary flow bench has been investigated using PIV. The measured velocity fields provide insight in the flow structures that occur. These velocity fields can be used to validate CFD calculations of the same flow.. It was found that the solid-body assumption that is used in swirl measurement practice to convert a measured torque to a rotational speed is only valid at larger valve lifts and mass flow rates. With lower mass flow rates, the centre of rotation does not coincide with the cylinder centre. Also the radial distribution of the tangential component of the velocity does not yield a straight line (i.e. is not proportional to the radius). 3. The torque calculated from PIV measurements of the velocity distribution is significantly lower then the torque, measured using a swirl-torquemeter. The assumptions made on the distribution of the axial velocity in the cylinder have a determining effect on the calculated torque. To make a good comparison between calculated and measured torque, the local axial velocity needs to be known. Stereo-PIV could be used to measure this. 4. By comparing the velocity measurements in a vertical plane through the cylinder axis (not shown in the paper), with and without a flow-rectifier, no significant influence of the swirl-torquemeter on the flow was found. It was found however, that the axial velocity profile is much more complicated than the constant axial velocity used for the solid-body profile assumption. 5. From a frequency analysis of the velocity field, it was found that the measured flow structures can be described by isotropic turbulence. The energy spectrum shows a characteristic 5 3 slope, indicating that the flow structures can be placed in the inertial sub range.
13 Turbulence and PTV 313 References 1. Graftieaux, L., Michard, M. and Grosjean, N. (1) Combining PIV, POD and vortex identification algorithms for the study of turbulent swirling flows, Measurement Science and Technology 1, p Grosjean, N., Graftieaux, L., Michard, M., Hübner, W.Tropea, C. and Volkert, J. (1997) Combining LDA and PIV for turbulence measurements in unsteady swirling flows, Measurement Science and Technology 8, p Heywood, J.B. (1988) Internal combustion engine fundamentals, McGraw Hill, New York. 4. Ladommatos, N., Balian, R.A. and Stone, R. (199) Analysis of swirl and its effect on diesel combustion, SAE technical paper series Liu, S., Meneveau, C. and Katz, J. (1994) On the properties of similarity subgrid scale models as deduced from measurements in a turbulent jet, Journal of Fluid Mechanics vol. 75 p , Cambridge University Press. 6. Lesieur, M (1997) Turbulence in fluids, Kluwer Academic, Dordrecht. 7. Tippelmann, G. (1977) A new method of investigation of swirl ports, SAE Technical Paper Series Westerweel, J. (1997) Efficient detection of spurious vectors in particle image velocimetry data, Experiments in Fluids 16, p
Simultaneous Velocity and Concentration Measurements of a Turbulent Jet Mixing Flow
Simultaneous Velocity and Concentration Measurements of a Turbulent Jet Mixing Flow HUI HU, a TETSUO SAGA, b TOSHIO KOBAYASHI, b AND NOBUYUKI TANIGUCHI b a Department of Mechanical Engineering, Michigan
More informationFuel and Air Flow in the Cylinder
Chapter 6 Fuel and Air Flow in the Cylinder 6.1) A four cylinder four stroke 3.0 L port-injected spark ignition engine is running at 00 rpm on a stoichiometric mix of octane and standard air at 100 kpa
More informationFlow Characteristics around an Inclined Circular Cylinder with Fin
Lisbon, Portugal, 7- July, 28 Flow Characteristics around an Inclined Circular Cylinder with Fin Tsuneaki ISHIMA, Takeshi SASAKI 2, Yoshitsugu GOKAN 3 Yasushi TAKAHASHI 4, Tomio OBOKATA 5 : Department
More informationSIMULTANEOUS VELOCITY AND CONCENTRATION MEASUREMENTS OF A TURBULENT JET MIXING FLOW
Proceedings of International Symposium on Visualization and Image in Transport Phenomena, Turkey, -9 Oct. SIMULTANEOUS VELOCITY AND CONCENTRATION MEASUREMENTS OF A TURBULENT JET MIXING FLOW Hui HU a, Tetsuo
More informationPIV Basics: Correlation
PIV Basics: Correlation Ken Kiger (UMD) SEDITRANS summer school on Measurement techniques for turbulent open-channel flows Lisbon, Portugal 2015 With some slides contributed by Christian Poelma and Jerry
More informationTHE EFFECT OF SAMPLE SIZE, TURBULENCE INTENSITY AND THE VELOCITY FIELD ON THE EXPERIMENTAL ACCURACY OF ENSEMBLE AVERAGED PIV MEASUREMENTS
4th International Symposium on Particle Image Velocimetry Göttingen, Germany, September 7-9, 00 PIV 0 Paper 096 THE EFFECT OF SAMPLE SIZE, TURBULECE ITESITY AD THE VELOCITY FIELD O THE EXPERIMETAL ACCURACY
More informationDesign and Aerodynamic Characterization of a Synthetic Jet for Boundary Layer Control
Design and Aerodynamic Characterization of a Synthetic Jet for Boundary Layer Control FRANCESCA SATTA, DANIELE SIMONI, MARINA UBALDI, PIETRO ZUNINO Department of Fluid Machines, Energy Systems, and Transportation
More informationTemperature distribution and heat flow across the combustion chamber wall.
ΜΕΤΑΔΟΣΗ ΘΕΡΜΟΤΗΤΑΣ ΣΤΟΝ ΚΥΛΙΝΔΡΟ (J.B. Heywood: Internal Combustion Engine Fundamentals McGraw Hill 1988) Temperature distribution and heat flow across the combustion chamber wall. Throughout each engine
More informationAbstract Particle image velocimetry (PIV)
Computation of Pressure Distribution Using PIV Velocity Data R. Gurka'l), A. Liberzon''), D. Hefet~'~), D. Rubinstein"), U. Shavit(')* 'I) Agricultural Engineering, Technion, Haifa 32000, Israel (anuri@tr.technian.ac.il)
More informationMixing at the External Boundary of a Submerged Turbulent Jet
Mixing at the External Boundary of a Submerged Turbulent Jet A. Eidelman, T. Elperin, N. Kleeorin, I. Rogachevskii, I. Sapir-Katiraie The Ben-Gurion University of the Negev, Beer-Sheva, Israel G. Hazak
More informationExperimental Study on the Non-reacting Flowfield of a Low Swirl Burner
Experimental Study on the Non-reacting Flowfield of a Low Swirl Burner Hang Yin & Ren Dai School of Energy and Powering Engineering, University of Shanghai for Science and Technology Box 25, 516# Jungong
More informationPIV Applications to Thermal Performance of LPG
PIV Applications to Thermal Performance of LPG Cooking Burner BY USA MAKMOOL And PROF.SUMRERNG JUGJAI Assoc. PROF. SUVIT TIA 1. Rational/ Problem Statement LPG consumption of Household sector (Thailand,
More informationANALYSES OF FLOW DUE TO RECIPROCATING PISTON - SPEED AND GEOMETRY EFFECTS
11th International Conference on Fluid Control, Measurements and Visualization FLUCOME 2011 Paper No. 222 December 5-9, 2011, National Taiwan Ocean University, Keelung, Taiwan ANALYSES OF FLOW DUE TO RECIPROCATING
More informationPIV STUDY OF LONGITUDINAL VORTICES IN A TURBULENT BOUNDARY LAYER FLOW
ICAS CONGRESS PIV STUDY OF LONGITUDINAL VORTICES IN A TURBULENT BOUNDARY LAYER FLOW G. M. Di Cicca Department of Aerospace Engineering, Politecnico di Torino C.so Duca degli Abruzzi, 4 - I 19 Torino, ITALY
More informationFigure 1. Schematic of experimental setup.
June 3 - July 3, Melbourne, Australia 9 9D- STRUCTURE OF 3D OFFSET JETS OVER A SURFACE MOUNTED SQUARE RIB Shawn P. Clark Department of Civil Engineering 7A Chancellors Circle, Winnipeg, Manitoba, R3T V,
More informationFlow Structure Investigations in a "Tornado" Combustor
Flow Structure Investigations in a "Tornado" Combustor Igor Matveev Applied Plasma Technologies, Falls Church, Virginia, 46 Serhiy Serbin National University of Shipbuilding, Mikolayiv, Ukraine, 545 Thomas
More informationDensity Field Measurement by Digital Laser Speckle Photography
Density Field Measurement by Digital Laser Speckle Photography by M. Kawahashi and H. Hirahara Saitama University Department of Mechanical Engineering Shimo-Okubo 255, Urawa, Saitama, 338-8570, Japan ABSTRACT
More informationExperiments on the perturbation of a channel flow by a triangular ripple
Experiments on the perturbation of a channel flow by a triangular ripple F. Cúñez *, E. Franklin Faculty of Mechanical Engineering, University of Campinas, Brazil * Correspondent author: fernandodcb@fem.unicamp.br
More informationAN UNSTEADY AND TIME-AVERAGED STUDY OF A GROUND VORTEX FLOW
24 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES AN UNSTEADY AND TIME-AVERAGED STUDY OF A GROUND VORTEX FLOW N J Lawson*, J M Eyles**, K Knowles** *College of Aeronautics, Cranfield University,
More informationSynthetic Jet Design Criteria and Application for Boundary Layer Separation Control
Synthetic Jet Design Criteria and Application for Boundary Layer Separation Control FRANCESCA SATTA, DANIELE SIMONI, MARINA UBALDI, PIETRO ZUNINO Department of Fluid Machines, Energy Systems, and Transportation
More informationINITIAL CONDITION EFFECTS ON KELVIN-HELMHOLTZ INSTABILITIES AND DEVELOPMENT OF A ROUND JET
INITIAL CONDITION EFFECTS ON KELVIN-HELMHOLTZ INSTABILITIES AND DEVELOPMENT OF A ROUND JET Amy B. McCleney and Philippe M. Bardet The George Washington University 800 22 nd St NW, Washington, D.C. 20037
More informationInvestigation of Radial Swirler Effect on Flow Pattern inside a Gas Turbine Combustor
Modern Applied Science May, 2009 Investigation of Radial Swirler Effect on Flow Pattern inside a Gas Turbine Combustor Yehia A. Eldrainy Department of Aeronautical Engineering, Faculty of Mechanical Engineering
More informationDARS overview, IISc Bangalore 18/03/2014
www.cd-adapco.com CH2O Temperatur e Air C2H4 Air DARS overview, IISc Bangalore 18/03/2014 Outline Introduction Modeling reactions in CFD CFD to DARS Introduction to DARS DARS capabilities and applications
More informationPARTICLE TRACKING VELOCIMETRY (PTV) MEASUREMENT OF ABRASIVE MICROPARTICLE IMPACT SPEED AND ANGLE IN BOTH AIR-SAND AND SLURRY EROSION TESTERS
Proceedings of the ASME 2016 Fluids Engineering Division Summer Meeting FEDSM2016 July 10-14, 2016, Washington, DC, USA FEDSM2016-7768 PARTICLE TRACKING VELOCIMETRY (PTV) MEASUREMENT OF ABRASIVE MICROPARTICLE
More informationBefore we consider two canonical turbulent flows we need a general description of turbulence.
Chapter 2 Canonical Turbulent Flows Before we consider two canonical turbulent flows we need a general description of turbulence. 2.1 A Brief Introduction to Turbulence One way of looking at turbulent
More informationPIV Investigation of the Intake Flow in a Parallel Valves Diesel Engine Cylinder. Jean A. P. A. Rabault
PIV Investigation of the Intake Flow in a Parallel Valves Diesel Engine Cylinder by Jean A. P. A. Rabault January 2015 Technical Reports from Royal Institute of Technology KTH Mechanics SE-100 44 Stockholm,
More informationEffect of Liquid Viscosity on Sloshing in A Rectangular Tank
International Journal of Research in Engineering and Science (IJRES) ISSN (Online): 2320-9364, ISSN (Print): 2320-9356 Volume 5 Issue 8 ǁ August. 2017 ǁ PP. 32-39 Effect of Liquid Viscosity on Sloshing
More information2 Navier-Stokes Equations
1 Integral analysis 1. Water enters a pipe bend horizontally with a uniform velocity, u 1 = 5 m/s. The pipe is bended at 90 so that the water leaves it vertically downwards. The input diameter d 1 = 0.1
More informationAnalysis of Flow inside Soundproofing Ventilation Unit using CFD
International Journal of Emerging Engineering Research and Technology Volume 6, Issue 8, 2018, PP 1-8 ISSN 2349-4395 (Print) & ISSN 2349-4409 (Online) Analysis of Flow inside Soundproofing Ventilation
More informationMultiphase Science and Technology, Vol. 16, Nos. 1-4, pp. 1-20, 2005
Multiphase Science and Technology, Vol. 16, Nos. 1-4, pp. 1-2, 25 EXPERIMENTS ON THE TURBULENT STRUCTURE AND THE VOID FRACTION DISTRIBUTION IN THE TAYLOR BUBBLE WAKE L. Shemer, A. Gulitski and D. Barnea
More informationLecture 9 Laminar Diffusion Flame Configurations
Lecture 9 Laminar Diffusion Flame Configurations 9.-1 Different Flame Geometries and Single Droplet Burning Solutions for the velocities and the mixture fraction fields for some typical laminar flame configurations.
More informationPASSIVE CONTROL ON JET MIXING FLOWS BY USING VORTEX GENERATORS
Proceedings of the Sixth Triennial International Symposium on Fluid Control, Measurement and Visualization, Sherbrooke, Canada, August -7,. PASSIVE CONTROL ON JET MIXING FLOWS BY USING VORTEX GENERATORS
More informationEHD flow produced by positive and negative point-to-plate corona discharges
Proc. 2018 Electrostatics Joint Conference 1 EHD flow produced by positive and negative point-to-plate corona discharges Eric Moreau, Patrick Braud, Etienne Defoort, Nicolas Benard University of Poitiers,
More informationModeling of turbulence in stirred vessels using large eddy simulation
Modeling of turbulence in stirred vessels using large eddy simulation André Bakker (presenter), Kumar Dhanasekharan, Ahmad Haidari, and Sung-Eun Kim Fluent Inc. Presented at CHISA 2002 August 25-29, Prague,
More informationPIV INVESTIGATION OF THE INTERNAL FLOW STRUCTURE IN A CENTRIFUGAL PUMP IMPELLER
PIV INVESTIGATION OF THE INTERNAL FLOW STRUCTURE IN A CENTRIFUGAL PUMP IMPELLER N. Pedersen (np@et.dtu.dk) 1 and C.B. Jacobsen 2 1 Dept. of Energy Engineering, Fluid Mechanics Section Building 43, Technical
More information25 years of PIV development for application in aeronautical test facilities
25 years of PIV development for application in aeronautical test facilities Jürgen Kompenhans and team Department Experimental Methods Institute of Aerodynamics and Flow Technology German Aerospace Center
More informationFluid Dynamics Exercises and questions for the course
Fluid Dynamics Exercises and questions for the course January 15, 2014 A two dimensional flow field characterised by the following velocity components in polar coordinates is called a free vortex: u r
More informationPIV study for the analysis of planar jets in cross-flow at low Reynolds number
PIV study for the analysis of planar jets in cross-flow at low Reynolds number Vincenti I., Guj G., Camussi R., Giulietti E. University Roma TRE, Department of Ingegneria Meccanica e Industriale (DIMI),
More informationExperimental Investigation of the Velocity Distribution near the Swirl Generator of a Uniflow Cyclone for Performance Data Prediction
Experimental Investigation of the Velocity Distribution near the Swirl Generator of a Uniflow Cyclone for Performance Data Prediction M. Pillei 1,2,*, R. Goller 1, T. Kofler 1, A. Wierschem 2, M. Kraxner
More information18th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics LISBON PORTUGAL JULY 4 7, 2016.
Multiple-eye PIV Eisaku Atsumi 1, Jun Sakakibara 2,* 1: Graduate School of Science and Technology, Meji university 2: Department of Mechanical Engineering, Meji university * Correspondent author: sakakiba@meiji.ac.jp
More informationInvestigation Of The Flow Field Inside Fluid Power Directional Control Valves By Means Of Particle Image Velocimetry
Investigation Of The Flow Field Inside Fluid Power Directional Control Valves By Means Of Particle Image Velocimetry G. Del Vescovo 1, A. Lippolis, S. Camporeale 1 1 Dipartimento di Ingegneria Meccanica
More informationPIV Measurements of turbulence statistics and near-wall structure of fully developed pipe flow at high Reynolds number
6th International Symposium on Particle Image Velocimetry Pasadena, California, USA, September 21-23, 2005 PIV 05 Paper nnnn PIV Measurements of turbulence statistics and near-wall structure of fully developed
More informationThe Effect of a Uniform Cross-flow on the Circulation of Vortex Rings. E. R. Hassan, R. M. Kelso and P. V. Lanspeary
th Australasian Fluid Mechanics Conference Crowne Plaza, Gold Coast, Australia -7 December 7 The Effect of a Uniform Cross-flow on the Circulation of Vortex Rings E. R. Hassan, R. M. Kelso and P. V. Lanspeary
More informationThis is the published version of a paper presented at Healthy Buildings 2017 Europe, Lublin, Poland.
http://www.diva-portal.org This is the published version of a paper presented at Healthy Buildings 2017 Europe, Lublin, Poland. Citation for the original published paper: Kabanshi, A., Sattari, A., Linden,
More informationNumerical Investigation of Ignition Delay in Methane-Air Mixtures using Conditional Moment Closure
21 st ICDERS July 23-27, 27 Poitiers, France Numerical Investigation of Ignition Delay in Methane-Air Mixtures using Conditional Moment Closure Ahmad S. El Sayed, Cécile B. Devaud Department of Mechanical
More informationPIV measurements of turbulence in an inertial particle plume in an unstratified ambient
PIV measurements of turbulence in an inertial particle plume in an unstratified ambient D.B. Bryant & S.A. Socolofsky Zachry Department of Civil Engineering, Texas A&M University, USA ABSTRACT: A high-speed
More informationME332 FLUID MECHANICS LABORATORY (PART I)
ME332 FLUID MECHANICS LABORATORY (PART I) Mihir Sen Department of Aerospace and Mechanical Engineering University of Notre Dame Notre Dame, IN 46556 Version: January 14, 2002 Contents Unit 1: Hydrostatics
More informationEffect of Primary Spray Characteristics on the Spray Generated by an Airblast Atomizer under High-Pressure Conditions
ISS mericas, st nnual Conference on iquid tomization and Spray Systems, Orlando, Florida, May 8-8 Effect of Primary Spray Characteristics on the Spray Generated by an irblast tomizer under High-Pressure
More informationA study of turbulence and cyclic variation levels in internal combustion engine cylinders
A study of turbulence and cyclic variation levels in internal combustion engine cylinders by N. St.Hill, P. Asadamongkon and K.C. Lee Experimental and Computational Laboratory for the Analysis of Turbulence
More informationA. Aleksandrov, H. Bockhorn
Experimental Investigation of the impact of imposed air inlet velocity oscillations on Soot Formation and Oxidation using an advanced 2-Colour-TIRE-LII A. Aleksandrov, H. Bockhorn Engler-Bunte-Institute,
More informationExperimental Investigation of Automobile Sunroof Buffeting Shear Flows
Seoul, Korea, 22-24 June 29 Experimental Investigation of Automobile Sunroof Buffeting Shear Flows Seong Ryong Shin and Moo Sang Kim Corporate Research & Development Division Hyundai Motor Company 772-1
More information+ = + t x x x x u. The standard Smagorinsky model has been used in the work to provide the closure for the subgridscale eddy viscosity in (2):
International Conference on Methods of Aerophysical Research, ICMAR 008 LARGE EDDY SIMULATION OF TURBULENT ROUND IMPINGING JET B.B. Ilyushin, D.V. Krasinsky Kutateladze Institute of Thermophysics SB RAS
More informationCENG 501 Examination Problem: Estimation of Viscosity with a Falling - Cylinder Viscometer
CENG 501 Examination Problem: Estimation of Viscosity with a Falling - Cylinder Viscometer You are assigned to design a fallingcylinder viscometer to measure the viscosity of Newtonian liquids. A schematic
More informationTurbulent Boundary Layers & Turbulence Models. Lecture 09
Turbulent Boundary Layers & Turbulence Models Lecture 09 The turbulent boundary layer In turbulent flow, the boundary layer is defined as the thin region on the surface of a body in which viscous effects
More informationTutorial School on Fluid Dynamics: Aspects of Turbulence Session I: Refresher Material Instructor: James Wallace
Tutorial School on Fluid Dynamics: Aspects of Turbulence Session I: Refresher Material Instructor: James Wallace Adapted from Publisher: John S. Wiley & Sons 2002 Center for Scientific Computation and
More informationExperimental Study on the Effects of Viscosity and Viscoelasticity on a Line Vortex Cavitation
Proceedings of the 7 th International Symposium on Cavitation CAV2009 Paper No. 152 August 17-22, 2009, Ann Arbor, Michigan, USA Experimental Study on the Effects of Viscosity and Viscoelasticity on a
More information4 Mechanics of Fluids (I)
1. The x and y components of velocity for a two-dimensional flow are u = 3.0 ft/s and v = 9.0x ft/s where x is in feet. Determine the equation for the streamlines and graph representative streamlines in
More informationIntroduction to Fluid Machines, and Compressible Flow Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur
Introduction to Fluid Machines, and Compressible Flow Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur Lecture - 09 Introduction to Reaction Type of Hydraulic
More informationTherefore, the control volume in this case can be treated as a solid body, with a net force or thrust of. bm # V
When the mass m of the control volume remains nearly constant, the first term of the Eq. 6 8 simply becomes mass times acceleration since 39 CHAPTER 6 d(mv ) CV m dv CV CV (ma ) CV Therefore, the control
More informationPARTICLE IMAGE VELOCIMETRY MEASUREMENTS IN AN AERATED STIRRED TANK
Chem. Eng. Comm., 189: 1208 1221, 2002 Copyright # 2002 Taylor & Francis 0098-6445/02 $12.00 +.00 DOI: 10.1080=00986440290012582 PARTICLE IMAGE VELOCIMETRY MEASUREMENTS IN AN AERATED STIRRED TANK NIELS
More informationOptical diagnostic techniques for spray systems
Optical diagnostic techniques for spray systems V. Stetsyuk and C. Crua Centre for Automotive Engineering, University of Brighton Workshop: Utilisation and valorisation of CO 2 for green chemistry Chemical
More informationLarge Eddy Simulation of Piloted Turbulent Premixed Flame
Large Eddy Simulation of Piloted Turbulent Premixed Flame Veeraraghava Raju Hasti, Robert P Lucht and Jay P Gore Maurice J. Zucrow Laboratories School of Mechanical Engineering Purdue University West Lafayette,
More informationVisualization of polymer relaxation in viscoelastic turbulent micro-channel flow
Supplementary Information for Visualization of polymer relaxation in viscoelastic turbulent micro-channel flow Authors: J. Tai, C. P. Lim, Y. C. Lam Correspondence to: MYClam@ntu.edu.sg This document includes:
More informationInvestigation of the non-reactive flow in a swirling burner
ISSN 1392-1207. MECHANIKA. Investigation of the non-reactive flow in a swirling burner F. Bode*, C. Giurgea**, V. Hodor***, P.Unguresan**** * Technical University of Cluj-Napoca, Department of Thermotechnics,
More informationDETERMINATION OF ABRASIVE PARTICLE VELOCITY USING LASER-INDUCED FLUORESCENCE AND PARTICLE TRACKING METHODS IN ABRASIVE WATER JETS
2005 WJTA American Waterjet Conference August 21-23, 2005 Houston, Texas DETERMINATION OF ABRASIVE PARTICLE VELOCITY USING LASER-INDUCED FLUORESCENCE AND PARTICLE TRACKING METHODS IN ABRASIVE WATER JETS
More informationFundamentals of Fluid Dynamics: Elementary Viscous Flow
Fundamentals of Fluid Dynamics: Elementary Viscous Flow Introductory Course on Multiphysics Modelling TOMASZ G. ZIELIŃSKI bluebox.ippt.pan.pl/ tzielins/ Institute of Fundamental Technological Research
More informationDynamo on the OMEGA laser and kinetic problems of proton radiography
Dynamo on the OMEGA laser and kinetic problems of proton radiography Archie Bott, Alex Rigby, Tom White, Petros Tzeferacos, Don Lamb, Gianluca Gregori, Alex Schekochihin (and many others ) 2 th August
More informationA Preliminary Study on Intake Flow to Improve In- Cylinder Air Motion
University of Windsor Scholarship at UWindsor Electronic Theses and Dissertations 2013 A Preliminary Study on Intake Flow to Improve In- Cylinder Air Motion Qiaochu Han University of Windsor Follow this
More informationOpen Access Experimental Research and Analysis of Vortex Excited Vibration Suppression of Spiral Stripe Strake
Send Orders for Reprints to reprints@benthamscience.ae The Open Mechanical Engineering Journal, 2014, 8, 941-947 941 Open Access Experimental Research and Analysis of Vortex Excited Vibration Suppression
More informationMicro-Flow in a bundle of micro-pillars. A. Keißner, Ch. Brücker
Micro-Flow in a bundle of micro-pillars A. Keißner, Ch. Brücker Institute of Mechanics and Fluid Dynamics, University of Freiberg, TU Freiberg, Germany, Email: armin.keissner@imfd.tu-freiberg.de Abstract
More informationBurst-mode laser particle image velocimetry with multi-time step processing for improved dynamic velocity range
Graduate Theses and Dissertations Iowa State University Capstones, Theses and Dissertations 2016 Burst-mode laser particle image velocimetry with multi-time step processing for improved dynamic velocity
More informationHeat Transfer Enhancement using Synthetic Jet Actuators in Forced Convection Water Filled Micro-Channels
Heat Transfer Enhancement using Synthetic Jet Actuators in Forced Convection Water Filled Micro-Channels V. Timchenko 1, J.A. Reizes 1, E. Leonardi 1, F. Stella 2 1 School of Mechanical and Manufacturing
More informationCounter-Current Shear Layer Vortex Generation Facility
Counter-Current Shear Layer Vortex Generation Facility Robert Thompson * and David Wall Auburn University, Auburn, Alabama, 36830 Dr. Brian Thurow Auburn University, Auburn, Alabama, 36830 A counter current
More informationSide-View Mirror Vibrations Induced Aerodynamically by Separating Vortices
Open Journal of Fluid Dynamics, 2016, 6, 42-56 Published Online March 2016 in SciRes. http://www.scirp.org/journal/ojfd http://dx.doi.org/10.4236/ojfd.2016.61004 Side-View Mirror Vibrations Induced Aerodynamically
More informationON THE ACCURACY OF SCALAR DISSIPATION MEASUREMENTS BY LASER RAYLEIGH SCATERING.
ON THE ACCURACY OF SCALAR DISSIPATION MEASUREMENTS BY LASER RAYLEIGH SCATERING. P.Ferrão, M.V Heitor and R. Salles Instituto Superior Técnico Mechanical Engineering Department Technical University of Lisbon
More informationInternal Flow Measurements of Turbomachinery using PIV
Internal Flow Measurements of Turbomachinery using PIV OHUCHIDA Satoshi : Turbo Machinery and Engine Technology Department, Products Development Center, Corporate Research & Development TAMAKI Hideaki
More informationSIMULATION OF PRECESSION IN AXISYMMETRIC SUDDEN EXPANSION FLOWS
Second International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 6-8 December 1999 SIMULATION OF PRECESSION IN AXISYMMETRIC SUDDEN EXPANSION FLOWS Baoyu GUO, Tim
More informationStrategy in modelling irregular shaped particle behaviour in confined turbulent flows
Title Strategy in modelling irregular shaped particle behaviour in confined turbulent flows M. Sommerfeld F L Mechanische Verfahrenstechnik Zentrum Ingenieurwissenschaften 699 Halle (Saale), Germany www-mvt.iw.uni-halle.de
More informationCOURSE NUMBER: ME 321 Fluid Mechanics I 3 credit hour. Basic Equations in fluid Dynamics
COURSE NUMBER: ME 321 Fluid Mechanics I 3 credit hour Basic Equations in fluid Dynamics Course teacher Dr. M. Mahbubur Razzaque Professor Department of Mechanical Engineering BUET 1 Description of Fluid
More informationDynamics of Large Scale Motions in Bubble-Driven Turbulent Flow
Dynamics of Large Scale Motions in Bubble-Driven Turbulent Flow Kyung Chun Kim School of Mechanical Engineering, Pusan National University Jangjeon-dong, Geumjeong-gu, Pusan, 609-735, Korea kckim@pusan.ac.kr
More informationPIV measurements and convective heat transfer of an impinging air jet
PIV measurements and convective heat transfer of an impinging air jet by T. S. O Donovan (), D. B. Murray () and A.A. Torrance (3) Department of Mechanical & Manufacturing Engineering, Trinity College
More informationExperimental investigation of flow control devices for the reduction of transonic buffeting on rocket afterbodies
Experimental investigation of flow control devices for the reduction of transonic buffeting on rocket afterbodies F.F.J. Schrijer 1, A. Sciacchitano 1, F. Scarano 1 1: Faculty of Aerospace Engineering,
More informationThe Turbulent Rotational Phase Separator
The Turbulent Rotational Phase Separator J.G.M. Kuerten and B.P.M. van Esch Dept. of Mechanical Engineering, Technische Universiteit Eindhoven, The Netherlands j.g.m.kuerten@tue.nl Summary. The Rotational
More informationFluid Dynamics Problems M.Sc Mathematics-Second Semester Dr. Dinesh Khattar-K.M.College
Fluid Dynamics Problems M.Sc Mathematics-Second Semester Dr. Dinesh Khattar-K.M.College 1. (Example, p.74, Chorlton) At the point in an incompressible fluid having spherical polar coordinates,,, the velocity
More informationFluid Flow Characteristics of a Swirl Jet Impinging on a Flat Plate
Fluid Flow Characteristics of a Swirl Jet Impinging on a Flat Plate Juliana K. Abrantes 1, Luis Fernando A. Azevedo 2 1: Department of Mechanical Engineering, PUC-Rio, Rio de Janeiro, Brazil, kuhlmann@mec.puc-rio.br
More informationIntroduction to Fluid Machines and Compressible Flow Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur
Introduction to Fluid Machines and Compressible Flow Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur Lecture - 1 Introduction to Fluid Machines Well, good
More information1. The first thing you need to find is the mass of piece three. In order to find it you need to realize that the masses of the three pieces must be
1. The first thing you need to find is the mass of piece three. In order to find it you need to realize that the masses of the three pieces must be equal to the initial mass of the starting rocket. Now
More informationSelf-Excited Vibration in Hydraulic Ball Check Valve
Self-Excited Vibration in Hydraulic Ball Check Valve L. Grinis, V. Haslavsky, U. Tzadka Abstract This paper describes an experimental, theoretical model and numerical study of concentrated vortex flow
More informationNumerical Simulation of the Hagemann Entrainment Experiments
CCC Annual Report UIUC, August 14, 2013 Numerical Simulation of the Hagemann Entrainment Experiments Kenneth Swartz (BSME Student) Lance C. Hibbeler (Ph.D. Student) Department of Mechanical Science & Engineering
More informationNumerical Investigation of the Transonic Base Flow of A Generic Rocket Configuration
1 Numerical Investigation of the Transonic Base Flow of A Generic Rocket Configuration A. Henze, C. Glatzer, M. Meinke, W. Schröder Institute of Aerodynamics, RWTH Aachen University, Germany March 21,
More informationMechanisms of Vortex Oscillation in a Fluidic Flow Meter
Vol. THE UNIVERSITY OF CENTRAL FLORIDA Published November 2, 2017 Mechanisms of Vortex Oscillation in a Fluidic Flow Meter By: Mohammed Al-Muqbel and Peshala Gamage Faculty Mentor: Dr. Hansen Mansy UCF
More informationColloquium FLUID DYNAMICS 2013 Institute of Thermomechanics AS CR, v.v.i., Prague, October 23-25, 2013 p.1
Colloquium FLUID DYNAMICS 2013 Institute of Thermomechanics AS CR, v.v.i., Prague, October 23-25, 2013 p.1 ON THE REYNOLDS NUMBER ROLE IN STRUCTURE OF RECIRCULATION ZONE BEHIND BACKWARD FACING STEP IN
More informationRigid bodies - general theory
Rigid bodies - general theory Kinetic Energy: based on FW-26 Consider a system on N particles with all their relative separations fixed: it has 3 translational and 3 rotational degrees of freedom. Motion
More informationFluid Mechanics Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur
Fluid Mechanics Prof. S. K. Som Department of Mechanical Engineering Indian Institute of Technology, Kharagpur Lecture - 15 Conservation Equations in Fluid Flow Part III Good afternoon. I welcome you all
More informationNUMERICAL SIMULATION OF THREE DIMENSIONAL GAS-PARTICLE FLOW IN A SPIRAL CYCLONE
Applied Mathematics and Mechanics (English Edition), 2006, 27(2):247 253 c Editorial Committee of Appl. Math. Mech., ISSN 0253-4827 NUMERICAL SIMULATION OF THREE DIMENSIONAL GAS-PARTICLE FLOW IN A SPIRAL
More informationDROP SIZE MEASUREMENT TECHNIQUES APPLIED TO GASOLINE SPRAYS
Paper ID ILASS08-058 ILASS08-7-7 ILASS 2008 Sep. 8-10, 2008, Como Lake, Italy DROP SIZE MEASUREMENT TECHNIQUES APPLIED TO GASOLINE SPRAYS Nicolas Fdida*, Jean-Bernard Blaisot, Alain Floch $, David Dechaume
More informationPIV Measurements of the Influence of Seeding Particles Concentration on the Velocity of an EHD Flow
29 Electrostatics Joint Conference Session P2.4 1 PIV Measurements of the Influence of Seeding Particles Concentration on the Velocity of an EHD Flow Michel Daaboul, Christophe Louste, and Hubert Romat
More informationVortex Induced Vibrations
Vortex Induced Vibrations By: Abhiroop Jayanthi Indian Institute of Technology, Delhi Some Questions! What is VIV? What are the details of a steady approach flow past a stationary cylinder? How and why
More information(Refer Slide Time: 0:45)
(Refer Slide Time: 0:45) Fluid Machines. Professor Sankar Kumar Som. Department Of Mechanical Engineering. Indian Institute Of Technology Kharagpur. Lecture-3. Impulse and Reaction Machines: Introductory
More informationFLOW MEASUREMENT. INC 102 Fundamental of Instrumentation and Process Control 2/2560
FLOW MEASUREMENT INC 102 Fundamental of Instrumentation and Process Control 2/2560 TABLE OF CONTENTS A. INTRODUCTION B. LOCAL FLOW MEASUREMENT B.1 Particle Image Velocimetry (PIV) B.2 Laser doppler anemometry
More information