3D hot-wire measurements of a wind turbine wake
|
|
- Ira Weaver
- 5 years ago
- Views:
Transcription
1 1 3D hot-wire measurements of a wind turbine wake Pål Egil Eriksen PhD candidate, NTNU/NOWITECH Per-Åge Krogstad NTNU
2 2 Outline of the presentation Experimental setup Measurement technique Time averaged results Phase-locked-averaged(PLA) results Possibilities for further analysis of the data Conclusions
3 3 Experimental setup (1/2) Exact same setup which was used in Blind Test 1 [1] Turbine positioned 4D from the entrance of the test section Test section 11.2m x 1.8 m x 2.7 m Allows for measurements 5D downstream of the turbine Data collected at 1D,3D & 5D for λ R = 6 along a horisontal line. Equipped with a balance and a traverse system Turbulence level 0.3 % Figure 1: Upstream view of the windtunnel [1] Blind test calculations of the performance and wake development for a model wind turbine. Krogstad and Eriksen, Renewable Energy, 2013
4 4 Experimental setup (2/2) Wind turbine model Diameter: 0.9 m Hub height: 0.8 m Re tip: ~ at λ R =6. Peak efficiency ~45% at λ R =6. Operated at a constant rpm using a frequency converter. Instrumentation: Torque sensor, rpm measurement using photo cell & slip rings. Photo cell and constant rotational speed makes phase locked averaging possible. Figure 2: Model turbine Figure 3: Blade profile (NREL S826)
5 5 Measurement technique (1/2) CTA hot wire anemometry 2.5 μm wire -> capable of high frequency response Figure 4: Sketch of crosswire Blind test 1 Used a single crosswire probe Consists of two wires Resolves two velocity components simultaneously Neglects cooling velocities normal to the plane of interest Can not resolve all shear stresses and third order moments Figure 5: Crosswire mounted on traverse in wind tunnel
6 6 Measurement technique (2/2) Current experiment Probe(hereafter called 2xw-probe) consisting of two cross wire probes measuring in orthogonal planes. Resolves all three components of the velocity vector Solved using an iterational procedure where binormal cooling is taken into account Probe crossection ~ 2mm Resolves all turbulent stresses Figure 6: Sketch of 2xw-probe
7 7 Time averaged results (1/2) Velocity defect Quite good match Deviation in the freestream of the order of 2-3% Probe rotation has a minor effect Figure 7: Velocity defect at x/d=1 for λ R =6
8 8 Time averaged results (2/2) Turbulent kinetic energy Quite good match Some deviation near the peak. Could be due to: Deviation in pitch angle Difference in probe response to flowfield Bump at z/r = Why? Phase-locked average of the data can give us the answer. Figure 8: Turbulent kinetic energy at x/d=1 for λ R =6
9 9 Phase locked average (1/4) Averaging with respect to rotor position Position is determined using the rotational speed and the photo cell PLA of turbulent kinetic energy Reveals position of tip vortices. Shows that the tipvortex of one blade is located at a different radial coordinate. May explains the bump in Figure 8. Figure 9: PLA of turbulent kinetic energy at x/d=1 for λ R =6
10 10 Phase locked average (2/4) Can investigate how the presence of the vortices affects the mean velocity field Figure 10: Vector plot of [U_radial,U_tangential] at x/d=1 for λ R =6. Overlapped with axial velocity contours.
11 11 Phase locked average (3/4) The turbulence level in the tip vortex region is dominating in the wake(as shown in figure 9) PLA can also be used to reveal more of the internal structure of the wake. By plotting the axial normal stress on a logarithmic scale the turbulence produced by the boundary layer on the blade can also be visualized. Can also see a peak in the centre with increased turbulence intensity. Figure 11: PLA of the streamwise normal stress at x/d=1 for λ R =6. Logarithmic z-scale.
12 12 Phase locked average (4/4) A close up of the radial velocity reveals a 3p variation in the centre region Could also be seen in Figure 9 Figure 12: PLA of the radial velocity at x/d=1 for λ R =6. Figure 13: PLA of the radial velocity at x/d=1 for λ R =6. Centre region
13 13 Other possibilities The dissipation rate ε can be estimated, eg. from the dissipation spectrum. Relevant information for numerical modelers. Investigation of isotropy Triple correlations can yield information which can be useful for estimating terms in the transport equations for turbulent kinetic energy. Figure 14: Example of dissipation spectrum obtained at x/d = 1. Not normalized.
14 14 Conclusions The new results match quite well with the old blind test results. Phase locked average can reveal a lot of information about the structure of the wake, which it is not possible to find from time averaged measurements. There are many possibilities for further analysis on the dataset.
Performance and wake development behind two in-line and offset model wind turbines "Blind test" experiments and calculations
Journal of Physics: Conference Series OPEN ACCESS Performance and wake development behind two in-line and offset model wind turbines "Blind test" experiments and calculations To cite this article: Lars
More informationarxiv: v1 [physics.flu-dyn] 11 Oct 2012
Low-Order Modelling of Blade-Induced Turbulence for RANS Actuator Disk Computations of Wind and Tidal Turbines Takafumi Nishino and Richard H. J. Willden ariv:20.373v [physics.flu-dyn] Oct 202 Abstract
More informationInvestigation of the Numerical Methodology of a Model Wind Turbine Simulation
Journal of Applied Fluid Mechanics, Vol. 11, No. 3, pp. 527-544, 2018. Available online at www.jafmonline.net, ISSN 1735-3572, EISSN 1735-3645. DOI: 10.29252/jafm.11.03.28028 Investigation of the Numerical
More informationFluid Dynamic Simulations of Wind Turbines. John Abraham, Brian Plourde, Greg Mowry University of St. Thomas
Fluid Dynamic Simulations of Wind Turbines John Abraham, Brian Plourde, Greg Mowry University of St. Thomas 1 Presentation Overview Why vertical-axis turbines? How are they modeled? How much energy can
More informationA Detached-Eddy-Simulation study
A Detached-Eddy-Simulation study Proper-Orthogonal-Decomposition of the wake flow behind a model wind turbine J. Göing 1, J. Bartl 2, F. Mühle 3, L. Sætran 2, P.U. Thamsen 1 Technical University of Berlin
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 informationAerodynamic Performance 1. Figure 1: Flowfield of a Wind Turbine and Actuator disc. Table 1: Properties of the actuator disk.
Aerodynamic Performance 1 1 Momentum Theory Figure 1: Flowfield of a Wind Turbine and Actuator disc. Table 1: Properties of the actuator disk. 1. The flow is perfect fluid, steady, and incompressible.
More informationValidation of Chaviaro Poulos and Hansen Stall Delay Model in the Case of Horizontal Axis Wind Turbine Operating in Yaw Conditions
Energy and Power Engineering, 013, 5, 18-5 http://dx.doi.org/10.436/epe.013.51003 Published Online January 013 (http://www.scirp.org/journal/epe) Validation of Chaviaro Poulos and Hansen Stall Delay Model
More informationManhar Dhanak Florida Atlantic University Graduate Student: Zaqie Reza
REPRESENTING PRESENCE OF SUBSURFACE CURRENT TURBINES IN OCEAN MODELS Manhar Dhanak Florida Atlantic University Graduate Student: Zaqie Reza 1 Momentum Equations 2 Effect of inclusion of Coriolis force
More informationValidation of the actuator line and disc techniques using the New MEXICO measurements
Downloaded from orbit.dtu.dk on: Dec, 7 Validation of the actuator line and disc techniques using the New MEXICO measurements Sarmast, Sasan; Shen, Wen Z.; Zhu, Wei Jun; Mikkelsen, Robert Flemming; Breton,
More informationAssessment of Various Diffuser Structures to Improve the Power Production of a Wind Turbine Rotor
DOI: 10.24352/UB.OVGU-2018-033 TECHNISCHE MECHANIK, 38, 3, (2018), 256-266 submitted: June 27, 2018 Assessment of Various Diffuser Structures to Improve the Power Production of a Wind Turbine Rotor Yiyin
More informationModule 3: Velocity Measurement Lecture 16: Validation of PIV with HWA. The Lecture Contains: Hotwire Anemometry. Uncertainity
The Lecture Contains: Hotwire Anemometry Hotwire Measurements Calibration Methodology Curve Fitting Directional Probe Senstivity Data Reduction Uncertainity Validation of Experiments Comparision of Hot
More informationThis article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution
More informationExploration of the Physics of Hub Drag
Exploration of the Physics of Hub Drag Felipe Ortega, Rajiv Shenoy, Vrishank Raghav Marilyn Smith and Narayanan Komerath Daniel Guggenheim Georgia Institute of Technology AIAA ASM Conference, Nashville
More informationPROPERTIES OF THE FLOW AROUND TWO ROTATING CIRCULAR CYLINDERS IN SIDE-BY-SIDE ARRANGEMENT WITH DIFFERENT ROTATION TYPES
THERMAL SCIENCE, Year, Vol. 8, No. 5, pp. 87-9 87 PROPERTIES OF THE FLOW AROUND TWO ROTATING CIRCULAR CYLINDERS IN SIDE-BY-SIDE ARRANGEMENT WITH DIFFERENT ROTATION TYPES by Cheng-Xu TU, a,b Fu-Bin BAO
More informationMeasurement methods in turbulent flows
Measurement methods in turbulent flows Neda Draskovic Mechanical Engineering Submission date: October 27 Supervisor: Lars Sætran, EPT Norwegian University of Science and Technology Department of Energy
More informationWind turbine wake interactions; results from blind tests
Journal of Physics: Conference Series PAPER OPEN ACCESS Wind turbine wake interactions; results from blind tests To cite this article: Per-Åge Krogstad and Lars Sætran 2015 J. Phys.: Conf. Ser. 625 012043
More informationInternational Conference on Methods of Aerophysical Research, ICMAR 2008
International Conference on Methods of Aerophysical Research, ICMAR 8 EXPERIMENTAL STUDY OF UNSTEADY EFFECTS IN SHOCK WAVE / TURBULENT BOUNDARY LAYER INTERACTION P.A. Polivanov, А.А. Sidorenko, A.A. Maslov
More informationThe CFD Investigation of Two Non-Aligned Turbines Using Actuator Disk Model and Overset Grids
Journal of Physics: Conference Series OPEN ACCESS The CFD Investigation of Two Non-Aligned Turbines Using Actuator Disk Model and Overset Grids To cite this article: I O Sert et al 2014 J. Phys.: Conf.
More informationLDA-Measurements of Jets in Crossflow for Effusion Cooling Applications
LDA-Measurements of Jets in Crossflow for Effusion Cooling Applications by K. M. Bernhard Gustafsson Department of Thermo and Fluid Dynamics Chalmers University of Technology SE-41296 Göteborg, SWEDEN
More informationOn the aeroacoustic tonal noise generation mechanism of a sharp-edged. plate
On the aeroacoustic tonal noise generation mechanism of a sharp-edged plate Danielle J. Moreau, Laura A. Brooks and Con J. Doolan School of Mechanical Engineering, The University of Adelaide, South Australia,
More informationFuture trends of applications of CFD to industrial design
Future trends of applications of CFD to industrial design 4 Fully-resolved LES (Large Eddy Simulation) Resolve such eddies that are responsible for production of turbulence in TBL λ x+ =300, λ y+ = 30,
More informationFlow disturbance due to presence of the vane anemometer
Journal of Physics: Conference Series OPEN ACCESS Flow disturbance due to presence of the vane anemometer To cite this article: M Bujalski et al 24 J. Phys.: Conf. Ser. 53 245 View the article online for
More informationVortex shedding from slender surface mounted pyramids
Vortex shedding from slender surface mounted pyramids M. J. Morrison 1, R. J. Martinuzzi 3, E. Savory 1, G. A. Kopp 2 1 Department of Mechanical and Materials Engineering, University of Western Ontario,
More informationMechanical Engineering for Renewable Energy Systems. Wind Turbines
ENGINEERING TRIPOS PART IB PAPER 8 - ELECTIVE (2) Mechanical Engineering for Renewable Energy Systems Wind Turbines Lecture 3: Aerodynamic fundamentals Hugh Hunt Fundamental fluid mechanics limits to energy
More informationINFLUENCE OF ACOUSTIC EXCITATION ON AIRFOIL PERFORMANCE AT LOW REYNOLDS NUMBERS
ICAS 2002 CONGRESS INFLUENCE OF ACOUSTIC EXCITATION ON AIRFOIL PERFORMANCE AT LOW REYNOLDS NUMBERS S. Yarusevych*, J.G. Kawall** and P. Sullivan* *Department of Mechanical and Industrial Engineering, University
More informationExperimental Verification of CFD Modeling of Turbulent Flow over Circular Cavities using FLUENT
Experimental Verification of CFD Modeling of Turbulent Flow over Circular Cavities using FLUENT T Hering, J Dybenko, E Savory Mech. & Material Engineering Dept., University of Western Ontario, London,
More informationLecture 4: Wind energy
ES427: The Natural Environment and Engineering Global warming and renewable energy Lecture 4: Wind energy Philip Davies Room A322 philip.davies@warwick.ac.uk 1 Overview of topic Wind resources Origin of
More informationMean Flow and Turbulence Measurements in the Near Field of a Fighter Aircraft Wing-Tip Vortex at High Reynolds Number and Transonic Flow Conditions
ESAIM : Proceedings, Vol. 7, 1999, 10-19 Third International Workshop on Vortex Flows and Related Numerical Methods http://www.emath.fr/proc/vol.7/ 10 Mean Flow and Turbulence Measurements in the Near
More informationEffects of the Leakage Flow Tangential Velocity in Shrouded Axial Compressor Cascades *
TSINGHUA SCIENCE AND TECHNOLOGY ISSNll1007-0214ll21/21llpp105-110 Volume 14, Number S2, December 2009 Effects of the Leakage Flow Tangential Velocity in Shrouded Axial Compressor Cascades * KIM Jinwook
More informationBLADE ROW INTERACTION IN A HIGH PRESSURE TURBINE
BLADE ROW INTERACTION IN A HIGH PRESSURE TURBINE V.S.P. Chaluvadi, A.I. Kalfas, M.R. Banieghbal, H.P. Hodson, J.D. Denton Whittle Laboratory, University of Cambridge Cambridge, England ABSTRACT This paper
More informationLaser Doppler Anemometry. Introduction to principles and applications
Laser Doppler Anemometry Introduction to principles and applications Characteristics of LDA Invented by Yeh and Cummins in 1964 Velocity measurements in Fluid Dynamics (gas, liquid) Up to 3 velocity components
More informationEffect of blowing rate on the film cooling coverage on a multi-holed plate: application on combustor walls
Effect of blowing rate on the film cooling coverage on a multi-holed plate: application on combustor walls P. Miron 1,2, C. Berat 1 & V. Sabelnikov 3 1 TURBOMECA-Bordes, France 2 LaTEP, Université de Pau
More informationLarge eddy simulations of the flow past wind turbines: actuator line and disk modeling
WIND ENERGY Wind Energ. (2014) Published online in Wiley Online Library (wileyonlinelibrary.com)..1747 RESEARCH ARTICLE Large eddy simulations of the flow past wind turbines: actuator line and disk modeling
More informationExperimental study of the horizontally averaged flow structure in a model wind-turbine array boundary layer
Experimental study of the horizontally averaged flow structure in a model wind-turbine array boundary layer Raúl Bayoán Cal, José Lebrón, Luciano Castillo, Hyung Suk Kang, and Charles Meneveau Citation:
More informationFan Stage Broadband Noise Benchmarking Programme
Fan Stage Broadband Noise Benchmarking Programme Specification of Fundamental Test Case 3 (FC3) Version 1 : 26 January 2015 Test Case Coordinator John Coupland ISVR University of Southampton UK E-mail
More informationIdentification of Markov Processes within a Wind Turbine Array Boundary Layer
Portland State University PDXScholar Dissertations and Theses Dissertations and Theses Summer 8-23-2013 Identification of Markov Processes within a Wind Turbine Array Boundary Layer Matthew Scott Melius
More informationKeywords: Contoured side-walls, design, experimental, laminar boundary layer, numerical, receptivity, stability, swept wing, wind tunnel.
Applied Mechanics and Materials Vol. 390 (2013) pp 96-102 Online available since 2013/Aug/30 at www.scientific.net (2013) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/amm.390.96
More informationJournal of Mechatronics, Electrical Power, and Vehicular Technology
J. Mechatron. Electr. Power Veh. Technol 06 (2015) 39 8 Journal of Mechatronics, Electrical Power, and Vehicular Technology e-issn:2088-6985 p-issn: 2087-3379 www.mevjournal.com GEOMETRY ANALYSIS AND EFFECT
More informationCHAPTER 4 OPTIMIZATION OF COEFFICIENT OF LIFT, DRAG AND POWER - AN ITERATIVE APPROACH
82 CHAPTER 4 OPTIMIZATION OF COEFFICIENT OF LIFT, DRAG AND POWER - AN ITERATIVE APPROACH The coefficient of lift, drag and power for wind turbine rotor is optimized using an iterative approach. The coefficient
More informationResearch on Dynamic Stall and Aerodynamic Characteristics of Wind Turbine 3D Rotational Blade
Research on Dynamic Stall and Aerodynamic Characteristics of Wind Turbine 3D Rotational Blade HU Guo-yu, SUN Wen-lei, Dong Ping The School of Mechanical Engineering Xinjiang University Urumqi, Xinjiang,
More informationResolution of tower shadow models for downwind mounted rotors and its effects on the blade fatigue
Journal of Physics: Conference Series OPEN ACCESS Resolution of tower shadow models for downwind mounted rotors and its effects on the blade fatigue To cite this article: M Reiso and M Muskulus 2014 J.
More information6. Laser Doppler Anemometry. Introduction to principles and applications
6. Laser Doppler Anemometry Introduction to principles and applications Characteristics of LDA Invented by Yeh and Cummins in 1964 Velocity measurements in Fluid Dynamics (gas, liquid) Up to 3 velocity
More informationTHE DECAY OF HOMOGENEOUS TURBULENCE GENERATED BY MULTI-SCALE GRIDS
THE DECAY OF HOMOGENEOUS TURBULENCE GENERATED BY MULTI-SCALE GRIDS P. C. Valente Turbulence, Mixing and Flow Control Group, Department of Aeronautics Imperial College London, London SW7 2AZ, United Kingdom
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 informationHigh-Order Numerical Simulations of Wind Turbine Wakes
Journal of Physics: Conference Series PAPER OPEN ACCESS High-Order Numerical Simulations of Wind Turbine Wakes To cite this article: E. Kleusberg et al 27 J. Phys.: Conf. Ser. 854 225 View the article
More informationMechanical Engineering for Renewable Energy Systems. Dr. Digby Symons. Wind Turbine Blade Design
ENGINEERING TRIPOS PART IB PAPER 8 ELECTIVE () Mechanical Engineering for Renewable Energy Systems Dr. Digby Symons Wind Turbine Blade Design Student Handout CONTENTS 1 Introduction... 3 Wind Turbine Blade
More informationWakes behind wind turbines - Studies on tip vortex evolution and stability. Ylva Odemark
Wakes behind wind turbines - Studies on tip vortex evolution and stability by Ylva Odemark May 22 Technical Reports from Royal Institute of Technology KTH Mechanics SE- 44 Stockholm, Sweden Akademisk avhandling
More informationStudy on the Performance of a Sirocco Fan (Flow Around the Runner Blade)
Rotating Machinery, 10(5): 415 424, 2004 Copyright c Taylor & Francis Inc. ISSN: 1023-621X print / 1542-3034 online DOI: 10.1080/10236210490474629 Study on the Performance of a Sirocco Fan (Flow Around
More informationAnalysis of Wind Turbine Pressure Distribution and 3D Flows Visualization on Rotating Condition
IOSR Journal of Engineering (IOSRJEN) ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 06, Issue 02 (February. 2016), V1 PP 18-30 www.iosrjen.org Analysis of Wind Turbine Pressure Distribution and 3D Flows
More informationI C E T. (International Collaboration on Experiments in Turbulence)
I C E T (International Collaboration on Experiments in Turbulence) Coordinated Measurements in High Reynolds Number Turbulent Boundary Layers from Three Wind Tunnels Hassan Nagib IIT Alexander Smits Princeton
More informationNumerical Simulation of a Blunt Airfoil Wake
6th Australasian Fluid Mechanics Conference Crown Plaza, Gold Coast, Australia 2-7 December 7 Numerical Simulation of a Blunt Airfoil Wake C.J. Doolan School of Mechanical Engineering University of Adelaide,
More informationGPPS NUMERICAL PREDICTION OF UNSTEADY ENDWALL FLOW AND HEAT TRANSFER WITH ONCOMING WAKE
Proceedings of Shanghai 17 Global Power and Propulsion Forum 3 th October 1 st November, 17 http://www.gpps.global GPPS-17-133 NUMERICAL PREDICTION OF UNSTEADY ENDWALL FLOW AND HEAT TRANSFER WITH ONCOMING
More informationASSESSMENT OF ANISOTROPY IN THE NEAR FIELD OF A RECTANGULAR TURBULENT JET
TUR-3 ExHFT-7 8 June 03 July 009, Krakow, Poland ASSESSMENT OF ANISOTROPY IN THE NEAR FIELD OF A RECTANGULAR TURBULENT JET Α. Cavo 1, G. Lemonis, T. Panidis 1, * 1 Laboratory of Applied Thermodynamics,
More informationVon Karman Vortices Formation at the Trailing Edge of a Turbine Blade
Von Karman Vortices Formation at the Trailing Edge of a Turbine Blade DANIELE SIMONI, MARINA UBALDI, PIETRO ZUNINO Department of Fluid Machines, Energy Systems and Transportation University of Genova Via
More informationNumerical Validation of Flow Through an S-shaped Diffuser
2012 International Conference on Fluid Dynamics and Thermodynamics Technologies (FDTT 2012) IPCSIT vol.33(2012) (2012) IACSIT Press, Singapore Numerical Validation of Flow Through an S-shaped Diffuser
More informationWind turbine wake interactions at field scale: An LES study of the SWiFT facility
Journal of Physics: Conference Series OPEN ACCESS Wind turbine wake interactions at field scale: An LES study of the SWiFT facility To cite this article: Xiaolei Yang et al 2014 J. Phys.: Conf. Ser. 524
More informationComparison Of Square-hole And Round-hole Film Cooling: A Computational Study
University of Central Florida Electronic Theses and Dissertations Masters Thesis (Open Access) Comparison Of Square-hole And Round-hole Film Cooling: A Computational Study 2004 Michael Glenn Durham University
More informationVortex Generator Induced Flow in a High Re Boundary Layer
Downloaded from orbit.dtu.dk on: Dec 20, 2017 Vortex Generator Induced Flow in a High Re Boundary Layer Velte, Clara Marika; Braud, C.; Coudert, S.; Foucaut, J.-M. Published in: Proceedings of Torque 2012,
More informationMeasured wind turbine loads and their dependence on inflow parameters
Measured wind turbine loads and their dependence on inflow parameters L. Manuel & L. D. Nelson Dept. of Civil Engineering, University of Texas at Austin, TX, USA H. J. Sutherland & P. S. Veers Sandia National
More informationInstability of wind turbine wakes immersed in the atmospheric boundary layer
Instability of wind turbine wakes immersed in the atmospheric boundary layer Francesco Viola 1, Giacomo Valerio Iungo 2, Simone Camarri 3, Fernando Porté-Agel 4 and François Gallaire 1 1 Ecole Polytechnique
More informationFinite Element Method for Turbomachinery Flows
SOCRATES Teaching Staff Mobility Program 2000-2001 DMA-URLS Finite Element Method for Turbomachinery Flows Numerical studies on axial flow fan rotor aerodynamics Alessandro Corsini Dipartimento di Meccanica
More informationHomogeneous Turbulence Generated by Multiscale
Journal of Physics: Conference Series Homogeneous Turbulence Generated by Multiscale Grids To cite this article: Per-Åge Krogstad and Peter Davidson 0 J. Phys.: Conf. Ser. 38 0304 View the article online
More informationPerformance Prediction of the Francis-99 Hydroturbine with Comparison to Experiment. Chad Custer, PhD Yuvraj Dewan Artem Ivashchenko
Performance Prediction of the Francis-99 Hydroturbine with Comparison to Experiment Chad Custer, PhD Yuvraj Dewan Artem Ivashchenko Unrestricted Siemens AG 2017 Realize innovation. Agenda Introduction
More informationEXCITATION OF GÖRTLER-INSTABILITY MODES IN CONCAVE-WALL BOUNDARY LAYER BY LONGITUDINAL FREESTREAM VORTICES
ICMAR 2014 EXCITATION OF GÖRTLER-INSTABILITY MODES IN CONCAVE-WALL BOUNDARY LAYER BY LONGITUDINAL FREESTREAM VORTICES Introduction A.V. Ivanov, Y.S. Kachanov, D.A. Mischenko Khristianovich Institute of
More informationOn the correlation of the acoustic signal of microphones mounted on a flat plate to the turbulence of an impinging jet
On the correlation of the acoustic signal of microphones mounted on a flat plate to the turbulence of an impinging jet C. Reichl a, M. Boeck a, W. Tilser a, H. Lang a, K. Haindl b, F. Reining b and M.
More information86400 Batu Pahat, Johor, Malaysia. Iwate University, Japan
Applied Mechanics and Materials Vols. 229-231 (2012) pp 2094-2099 (2012) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/amm.229-231.2094 Experimental and Numerical Investigation on
More informationFlowfield Measurements for a Highly Turbulent Flow in a Stator Vane Passage
Flowfield Measurements for a Highly Turbulent Flow in a Stator Vane Passage R. W. Radomsky and K. A. Thole Mechanical Engineering Department University of Wisconsin Madison, Wisconsin 53706 Abstract Turbine
More information6. Laser Doppler Anemometry. Introduction to principles and applications
6. Laser Doppler Anemometry Introduction to principles and applications Characteristics of LDA Invented by Yeh and Cummins in 1964 Velocity measurements in Fluid Dynamics (gas, liquid) Up to 3 velocity
More informationExperimental Investigations of Hydrokinetic and Wind Turbines at Full Dynamic Similarity
Experimental Investigations of Hydrokinetic and Wind Turbines at Full Dynamic Similarity Marcus Hultmark, Mark Miller, Janik Kiefer, Arthur Phidd, Christie Elford, and Dan Hoffman E-ffiliates Annual Meeting
More informationNumerical Investigation of Aerodynamic Performance and Loads of a Novel Dual Rotor Wind Turbine
energies Article Numerical Investigation of Aerodynamic Performance and Loads of a Novel Dual Rotor Wind Turbine Behnam Moghadassian, Aaron Rosenberg and Anupam Sharma * Department of Aerospace Engineering,
More informationCalculation of Power, Shear and Gas-liquid mass transfer in reactors for fermentation.
VISIMIX TURBULENT. GAS-LIQUID MIXING. FERMENTATION. Calculation of Power, Shear and Gas-liquid mass transfer in reactors for fermentation. 1. Subject of calculations and initial data. This example demonstrates
More informationHigh frequency blade surface temperature determination using surface mounted hotfilm gauges
Proceedings of the XV th Bi-Annual Symposium on Measuring Techniques in Transonic and Supersonic Flows in Cascades and Turbomachines 2-22 September, Firenze/Italy High frequency blade surface temperature
More informationImpinging swirling jet against a wall: experimental investigation by PIV and high speed visualizations
Impinging swirling jet against a wall: experimental investigation by PIV and high speed visualizations Mario Felli, Massimo Falchi, Pietro Fornari 1: Propulsion and Cavitation Laboratory, INSEAN, Italy,
More informationThree-dimensional measurements in the baffle region of a turbulently stirred tank
Three-dimensional measurements in the baffle region of a turbulently stirred tank Proceedings of European Congress of Chemical Engineering (ECCE-6) Copenhagen, 16-20 September 2007 Three-dimensional measurements
More informationNumerical Simulations of Wakes of Wind Turbines Operating in Sheared and Turbulent Inflow
Numerical Simulations of Wakes of Wind Turbines Operating in Sheared and Turbulent Inflow Niels Troldborg, Jens N. Sørensen, Robert Mikkelsen Wind Energy Department, Risø National Laboratory, DK- Roskilde,
More informationKinetic energy entrainment in wind turbine and actuator disc wakes: an experimental analysis
Home Search Collections Journals About Contact us My IOPscience Kinetic energy entrainment in wind turbine and actuator disc wakes: an experimental analysis This content has been downloaded from IOPscience.
More informationA Pair of Large-incidence-angle Cylinders in Cross-flow with the Upstream One Subjected to a Transverse Harmonic Oscillation
Proceedings of the 2010 International Conference on Industrial Engineering and Operations Management Dhaka, Bangladesh, January 9 10, 2010 A Pair of Large-incidence-angle Cylinders in Cross-flow with the
More informationDetailed Outline, M E 320 Fluid Flow, Spring Semester 2015
Detailed Outline, M E 320 Fluid Flow, Spring Semester 2015 I. Introduction (Chapters 1 and 2) A. What is Fluid Mechanics? 1. What is a fluid? 2. What is mechanics? B. Classification of Fluid Flows 1. Viscous
More informationAerodynamic Characteristics of Flow over Circular Cylinders with Patterned Surface
Aerodynamic Characteristics of Flow over Circular Cylinders with Patterned Surface U. Butt and C. Egbers Abstract Flow over circular cylinders with patterned surfaces is investigated and discussed taking
More informationGENERALISATION OF THE TWO-SCALE MOMENTUM THEORY FOR COUPLED WIND TURBINE/FARM OPTIMISATION
25 th National Symposium on Wind Engineering, Tokyo, Japan, 3-5 December 2018 第 25 回風工学シンポジウム (2018) GENERALISATION OF THE TWO-SCALE MOMENTUM THEORY FOR COUPLED WIND TURBINE/FARM OPTIMISATION Takafumi
More informationACCURACY OF FAST-RESPONSE PROBES IN UNSTEADY TURBINE FLOWS
The 16th Symposium on Measuring Techniques in Transonic and Supersonic Flow in Cascades and Turbomachines ACCURACY OF FAST-RESPONSE PROBES IN UNSTEADY TURBINE FLOWS R. J. Miller Whittle Laboratory University
More informationUnsteady Transition Phenomena at the Leading Edge of Compressor Blades
Chapter 8 Unsteady Transition Phenomena at the Leading Edge of Compressor Blades Unsteady flow arising from interactions between adjacent blade rows in axial turbomachinery usually results in multi-moded
More informationSymmetry of Turbulent Characteristics Inside Urban Intersection
Colloquium FLUID DYNAMICS 2007 Institute of Thermomechanics AS CR, v. v. i., Prague, October 24-26, 2007 p.1 Symmetry of Turbulent Characteristics Inside Urban Intersection Radka Kellnerová 1,2 Zbyněk
More informationExperimental Studies for Visualization of Flow with Boundary Layers in an Axial Compressor Fan Inlet using Pressure Probes
Indian Journal of Science and Technology, Vol 9(45), DOI: 10.17485/ijst/2016/v9i45/104694, December 2016 ISSN (Print) : 0974-6846 ISSN (Online) : 0974-5645 Experimental Studies for Visualization of Flow
More informationANALYSIS OF HORIZONTAL AXIS WIND TURBINES WITH LIFTING LINE THEORY
ANALYSIS OF HORIZONTAL AXIS WIND TURBINES WITH LIFTING LINE THEORY Daniela Brito Melo daniela.brito.melo@tecnico.ulisboa.pt Instituto Superior Técnico, Universidade de Lisboa, Portugal December, 2016 ABSTRACT
More informationLES ANALYSIS ON CYLINDER CASCADE FLOW BASED ON ENERGY RATIO COEFFICIENT
2th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics ANALYSIS ON CYLINDER CASCADE FLOW BASED ON ENERGY RATIO COEFFICIENT Wang T.*, Gao S.F., Liu Y.W., Lu Z.H. and Hu H.P. *Author
More informationJournal of Fluid Science and Technology
Bulletin of the JSME Vol.9, No.3, 24 Journal of Fluid Science and Technology Re-evaluating wake width in turbulent shear flow behind an axisymmetric cylinder by means of higher order turbulence statistics
More informationInfluence of Tip Speed Ratio on Wake Flow Characteristics Utilizing Fully Resolved CFD Methodology
Journal of Physics: Conference Series PAPER OPEN ACCESS Influence of Tip Speed Ratio on Wake Flow Characteristics Utilizing Fully Resolved CFD Methodology To cite this article: M. Salman Siddiqui et al
More informationLect-36. In this lecture... Tutorial on radial flow turbines. Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay
Lect- 36 1 In this lecture... Lect-36 Tutorial on radial flow turbines 2 Problem # 1 Lect-36 The rotor of an IFR turbine, which is designed to operate at the nominal condition, is 23.76 cm in diameter
More informationand methods. Manometers. Pressure-based measurement of velocity magnitude and direction. Anemometers, thermal probes. Temperature measurements.
FLOW MEASUREMENTS Dr. János VAD, associate professor, Dept. Fluid Mechanics, BME Vad, J. (2008), Advanced flow measurements. Mőegyetemi Kiadó, 45085. Interactive presentations ( PREMIUM SCORES ): 1: Introduction.
More informationExperimental study of a round jet in cross-flow by means of PIV
Experimental stud of a round jet in cross-flow b means of PIV Gennaro Cardone, Francesco G. Nese and T. Astarita Dipartimento di Energetica TErmofluidodinamica applicata e Condizionamenti Ambientali DETEC,
More informationExperimental Study of Near Wake Flow Behind a Rectangular Cylinder
American Journal of Applied Sciences 5 (8): 97-926, 28 ISSN 546-9239 28 Science Publications Experimental Study of Near Wake Flow Behind a Rectangular Cylinder Abdollah Shadaram, Mahdi Azimi Fard and Noorallah
More informationAerodynamic Rotor Model for Unsteady Flow and Wake Impact
Aerodynamic Rotor Model for Unsteady Flow and Wake Impact N. Bampalas, J. M. R. Graham Department of Aeronautics, Imperial College London, Prince Consort Road, London, SW7 2AZ June 28 1 (Steady Kutta condition)
More informationDETERMINATION OF 3-D VELOCITY FIELD FROM THE FOUR HOT-WIRE OUTPUT SIGNALS USING THREE AGAINST ONE ALGORITHM
THERMAL SCIENCE: Year 018, Vol., No. 1B, pp. 747-757 747 DETERMINATION OF 3-D VELOCITY FIELD FROM THE FOUR HOT-WIRE OUTPUT SIGNALS USING THREE AGAINST ONE ALGORITHM by Milovan KOTUR a, Pero PETROVIĆ a,
More informationAdaptive Control of Variable-Speed Variable-Pitch Wind Turbines Using RBF Neural Network
Schulich School of Engineering Department of Mechanical and Manufacturing Engineering Adaptive Control of Variable-Speed Variable-Pitch Wind Turbines Using RBF Neural Network By: Hamidreza Jafarnejadsani,
More informationLANDING GEARS AERODYNAMIC INTERACTION NOISE
European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2004 P. Neittaanmäki, T. Rossi, S. Korotov, E. Oñate, J. Périaux, and D. Knörzer (eds.) Jyväskylä, 24 28 July 2004
More informationPassive Turbulence Generating Grid Arrangements in a Turbine Cascade Wind Tunnel
Passive Turbulence Generating Grid Arrangements in a Turbine Cascade Wind Tunnel Connor J. Wiese *, Michael J. McClearn, Giovanni Allevato, and Richard T. Guttman III United States Air Force Academy, USAFA,
More information(ADVANCED) FLOW MEASUREMENTS Dr. János VAD, associate professor, Dept. Fluid Mechanics, BME
(ADVANCED) FLOW MEASUREMENTS Dr. János VAD, associate professor, Dept. Fluid Mechanics, BME Vad, J. (2008), Advanced flow measurements. Mőegyetemi Kiadó, 45085. Interactive presentations ( PREMIUM SCORES
More informationThe Study of Turbulent Boundary Layer Characteristics Downstream of Different Shaped Transverse Grooves
Proceedings of the International Conference on Fluid and Thermal Energy Conversion 2009 FTEC 2009 Tongyeong, South Korea, December 7 10, 2009 ISSN 0854-9346 The Study of Turbulent Boundary Layer Characteristics
More information