DESIGN AND MODIFICATION OF WATER- STABILIZED PLASMA GENERATOR
|
|
- Ashley Garrett
- 5 years ago
- Views:
Transcription
1 INTERNATIONAL DESIGN CONFERENCE - DESIGN 2002 Dubrovnk, May 14-17, DESIGN AND MODIFICATION OF WATER- STABILIZED PLASMA GENERATOR J. Moravec, M. Hrabovsky and R. Matas Keywords: Transformaton process, CAD model, nnovatve engneerng, CFD software, desgn, smulaton parameters, stablsed arc 1. Introducton Plasma torches wth -stablzed arcs provde an alternatve to the commonly used sources of thermal plasmas based on gas stablzed arcs or RF dscharges. The oxygen-hydrogen plasma jet s produced wth extremely hgh plasma enthalpy and flow velocty. Such plasma torches wth stablzed arc provde specal performance characterstcs n some plasma processng applcatons such as plasma sprayng or waste treatment. The sprayng rates wth plasma torches are almost one order hgher than the rates acheved n commonly used gas plasma torches. tangental nlet swrl I.E m arc cathode vapour zone anode vortex Fgure 1. Schema of the -stablzed arc Q outlet ext nozzle The arc chamber of the torch s dvded nto several sectons by baffles wth central holes. Water s njected tangentally nto the sectons where the vortex s created. The nner dameter of the vortex s determned by the dameter of the holes n the baffles. Water s exhausted at two postons along the arc chamber. The cathode s created ether by a graphte rod, whch s automatcally moved nto the chamber to compensate for eroson, or by a tungsten tp protected from contact wth plasma by a stream of nert gas. An anode made of a copper dsc wth nternal coolng s located outsde the arc chamber downstream of the nozzle ext. The scheme of the chamber s shown n Fg. 1; a more detaled descrpton of the equpment has been publshed e.g. n [Jensta 1999] and [Hrabovsky 1998]. All plasma and arc parameters as well as the stablty of the torch operaton are strongly nfluenced by the flow of the stablzng. Ths paper s devoted to the modellng of flow n an arc-stablzng chamber. TECHNICAL SYSTEMS 1079
2 2. Desgn of the chamber geometry and computatonal mesh To acheve an mproved desgn of the -stablsed plasma generator were use connectons among the Theory of Techncal Systems and other methods and tools for nnovatve engneerng desgn e.g. Desgn for X, FMEA, IMLab (TIPS) etc. The lnkage of the Theory of Techncal Systems wth these methods and tools creates a strong potental for the nnovaton of exstng solutons [Hubka 2001]. Here we used Desgn Scence (Theory of Techncal Systems) aded by the IMLab tools. Inventon Machne Lab (IMLab) s an ntellgent SW problem solver for engneers, engneerng desgners, technologst, nventors, scentsts, teachers all those who are professonally engaged n technology, engneerng and /or engneerng desgn. Envronment : Space, Tme Human System Techncal Systems Informaton System Management & Goal System Transformaton System TrS HuS TS IS M& GS Operand Od1 n exstng state Transformaton Process TrP Feedback Operand Od2 n desred state Fgure 2. Transformaton process n the Theory of Techncal Systems IMLab s based on the Theory of Inventve Problem Solvng (TIPS), whch was created by accumulatng and generalsng the nventve deas from the world s patent collecton. It has been establshed that the best nventve deas comply wth a relatvely small number of unversal prncples and rules. Our understandng of ths makes the process of problem solvng much more effcent and predcts the development of techncal systems and technologcal processes [Fg. 1]. In ths case we frst used IMLab n the process of the analyss of propertes. Here we created foundatons for solvng new problems and prncples. After an analysng of propertes and formulatons of the task we used IMLab n the process of creatng a desgn varant of a plasma torch for fndng solutons of prncples. The next step was to mprove the desgn varant of ths plasma generator for computer testng. computed area cathode anode Fgure 3. CAD model of the plasma chamber geometry 1080 TECHNICAL SYSTEMS
3 A 3D model of the geometry of the -stablzed plasma generator was prepared wth several modfcatons usng CAD software I-DEAS MS8. The full parametrc model was used to enable smple and rapd modfcatons of geometry. A model of the nternal space of plasma chamber (selected part of the overall geometry model) together wth the 3D geometry model was created to solve two-phase flow feld [Fg.3]. Ths model was parttoned for quck desgn of the mesh. The models n several modfcatons n IGES format were read nto pre-processor GAMBIT, whch had been used to generate the computatonal meshes. 3. Mathematcal model for the multphase soluton The flow n the plasma torch of a plasma generator s a very complcated physcal phenomenon and the avalable computng systems do not allow to solve the problem wthout some smplfcaton, but the qualty of the wall s a man factor n the stablzaton. The system FLUENT 5 for flud flow and heat transfer computatons based on the fnte volume method was used to solve partal dfferental equatons. The basc equatons of flud flow follow: The mass conservaton equaton ρ t + ( ρu ) = 0 (1) and the momentum conservaton equaton (Naver-Stokes equaton) t j ( ρ u ) + ( ρu u ) = + + ρg j j p τ j, (2) where τ j s the stress tensor. The segregated solver was used to solve the multphase models, the dscretzaton schemes of the frst and the second order were appled. The turbulent flow was consdered, the rng k-ε two equaton s turbulence model was used to close the equatons system. The ncompressble flud was consdered. The Volume of Flud (VOF) model was appled to solve the mult-phases flow feld. The VOF formulaton reles on the fact that two or more fluds (or phases) do not nterpenetrate. In each control volume, the volume fractons of all phases sum to unty. The trackng of the nterface between the phases s accomplshed by the soluton of a contnuty equaton for the volume fracton of one (or more) phases. For the q-th phase, ths equaton has the followng form: α t q + u α q = 0. (3) The volume fracton equaton s not solved for the chosen phase (so-called prmary phase); the prmary-phase volume fracton s based on the followng constrant: n q= 1 α. (4) q = 1 A sngle momentum equaton s solved throughout the doman, and the resultng velocty feld s shared among the phases. The momentum equaton results from the volume fractons of all phases dependng upon the propertes ρ (densty) and µ (vscosty). The mplct method was used to solve the multphase flow. TECHNICAL SYSTEMS 1081
4 4. Performed calculatons The descrbed model and ts parameters were tested successfully on a smple model [Matas 2001]. Hexahedral computatonal mesh was used for the base model. Optmsaton of the mathematcal model led up to the model wth hybrd mesh combnng hexahedral and tetrahedral elements [Fg.4]. The number of cells was about 1 Mo. cells for all meshes. ext base computed area wth mesh optmsed computed Fgure 4. Example of computatonal meshes The followng boundary condtons were used to complete the task: the velocty on nlet 26, 28 and 30 ms -1, the pressure on outlet from 70 to 100 kpa and the pressure of gas on nozzle ext 100 kpa. Several geometrcal modfcatons of the exhaust channel were compared. The wdth and the shape of the channel play very mportant roles n the gas sucton [Hrabovsky 2001]. The range of the computed area also plays a very sgnfcant role. The computed results gve good basc nformaton about the multphase flow n the torch chamber wthout arc. The computed flow felds show the nfluence of the asymmetrc locaton of nlets on the dstrbuton of flow parameters (pressure, velocty and volume fracton of phases) n the centre of the chamber. Examples of results are n fgures 5 and 6. Fg. 5 demonstrates the unsutable structure of flow n the outlet area for the older chamber desgn wth keen edges (left part of the pcture) and much better flow structure for the new desgn wth rounded edges (rght part). Fgure 5. Velocty vectors colored by volume fracton of ar on the nput to the sucton system 1082 TECHNICAL SYSTEMS
5 Fg. 6 presents the contours of the dstrbuton of the phases - the -ar dstrbuton. It depends on the computatonal model used and geometry. On Fgure 7 the velocty of n the vortex on slce at the velocty nlets plane s depcted, the vortex speed s about 3000 rpm. Fgure 6. Contours of fracton on slces through the computatonal doman for two dfferent ranges of computed area The comparson wth expermental results shows a good agreement of phase nterface. It seems that the -gas nterface s stable for varous pressures and geometrc condtons, the unsteady smulaton shows major nstabltes only on the nput of the sucton system. The shape of the gas nterface s not optmal, the optmsaton of the geometry nlet dameters would do for more unform dstrbuton of phases. Fgure 7. Velocty magntude of n vortex on slce through velocty nlets The value between 0.5 and 0.7 was computed for the volume fracton of ar (argon) on the outlet n the base models, the optmsed models gve the value between 0.35 and 0.4 whle the expermentally measured value s about 0.3. It has been proved that the computatons are very senstve to the settng of boundary condtons and the range of the computatonal doman. 5. Conclusons The am of the work has been the optmsaton of the torch chamber geometry. The new desgn of the chamber can reduce the sucton of the gas (ar, argon) by the outlet and mprove the stablty of -gas nterface. The performed computatons confrmed possblty of the smulaton of the multphase flow n arc chamber optmsaton. The computed flow feld shows the phase dstrbuton of and ar. The defnton of pressure boundary condtons proved to be very mportant for the calculatons and TECHNICAL SYSTEMS 1083
6 the sze of the computatonal doman has a very sgnfcant nfluence on the computed mass-flow rate of gas. The results show the sgnfcant nfluence of modfcatons of the sucton system geometry on beng flow feld dstrbuton. Future computatons wth mproved models of the output system are prepared. They should gve more accurate results of the phase dstrbuton and gas flow rate. Further actvtes wll be drected towards a model wth an ncluded heat source burnng electrc arc. Acknowledgement Ths paper s based upon work sponsored by the Mnstry of Educaton of the Czech Republc under research and development project LN00B084. References Jensta J., Hrabovsky M., Kopecky V., Effect of Vortex Moton of Stablzng Lqud Wall on Propertes of Arc n Water Plasma Torch, Annals New York Academy of Scences, Vol. 891, Heat and Mass transfer under Plasma Condtons (ed. P. Fauchas, J. van den Mullen, J. Heberlen), New York 1999, Hrabovsky M., Water-Stablzed Plasma Generators, Pure & Appled Chemstry 70, 1998, No. 6, pp Hubka, V., Eder, W.E., Hosnedl, S., Manual of Engneerng Desgn, Preprnt. Heursta Zürch CH, Matas, R., Frst Experences wth Multphase Modellng of Flow n Arc Chamber of Water Stablzed Plasma Generator, Proceedngs of UWB, Vol 4/2000, Plzen 2001, pp Hrabovsky M., Matas, R., Moravec J., Desgn and Modfcaton of Water-Stablzed Plasma Generator and Multphase Modellng of Flow n Arc Chamber, Proceedngs FSO 2001, Brno, 2001, pp Ing. Jan Moravec New Technologes Research Centre, Unversty of West Bohema Unverztn 8, Plzen, , Czech Republc Phone: ++420/19/ Emal: moravec@ntc.zcu.cz 1084 TECHNICAL SYSTEMS
STUDY ON TWO PHASE FLOW IN MICRO CHANNEL BASED ON EXPERI- MENTS AND NUMERICAL EXAMINATIONS
Blucher Mechancal Engneerng Proceedngs May 0, vol., num. www.proceedngs.blucher.com.br/evento/0wccm STUDY ON TWO PHASE FLOW IN MICRO CHANNEL BASED ON EXPERI- MENTS AND NUMERICAL EXAMINATIONS Takahko Kurahash,
More informationNumerical Heat and Mass Transfer
Master degree n Mechancal Engneerng Numercal Heat and Mass Transfer 06-Fnte-Dfference Method (One-dmensonal, steady state heat conducton) Fausto Arpno f.arpno@uncas.t Introducton Why we use models and
More informationAdiabatic Sorption of Ammonia-Water System and Depicting in p-t-x Diagram
Adabatc Sorpton of Ammona-Water System and Depctng n p-t-x Dagram J. POSPISIL, Z. SKALA Faculty of Mechancal Engneerng Brno Unversty of Technology Techncka 2, Brno 61669 CZECH REPUBLIC Abstract: - Absorpton
More informationIntroduction to Computational Fluid Dynamics
Introducton to Computatonal Flud Dynamcs M. Zanub 1, T. Mahalakshm 2 1 (PG MATHS), Department of Mathematcs, St. Josephs College of Arts and Scence for Women-Hosur, Peryar Unversty 2 Assstance professor,
More informationCFD VALIDATION OF STRATIFIED TWO-PHASE FLOWS IN A HORIZONTAL CHANNEL
CFD VALIDATION OF STRATIFIED TWO-PHASE FLOWS IN A HORIZONTAL CHANNEL 1. Introducton Chrstophe Vallée and Thomas Höhne In dfferent scenaros of small break Loss of Coolant Accdent (SB-LOCA), stratfed twophase
More informationTHE EFFECT OF TORSIONAL RIGIDITY BETWEEN ELEMENTS ON FREE VIBRATIONS OF A TELESCOPIC HYDRAULIC CYLINDER SUBJECTED TO EULER S LOAD
Journal of Appled Mathematcs and Computatonal Mechancs 7, 6(3), 7- www.amcm.pcz.pl p-issn 99-9965 DOI:.75/jamcm.7.3. e-issn 353-588 THE EFFECT OF TORSIONAL RIGIDITY BETWEEN ELEMENTS ON FREE VIBRATIONS
More informationThe Finite Element Method
The Fnte Element Method GENERAL INTRODUCTION Read: Chapters 1 and 2 CONTENTS Engneerng and analyss Smulaton of a physcal process Examples mathematcal model development Approxmate solutons and methods of
More informationINTERROGATING THE FLOW BEHAVIOUR IN A NOVEL MAGNETIC DESICCANT VENTILATION SYSTEM USING COMPUTATIONAL FLUID DYNAMICS (CFD)
INTERROGATING THE FLOW BEHAVIOUR IN A NOVEL MAGNETIC DESICCANT VENTILATION SYSTEM USING COMPUTATIONAL FLUID DYNAMICS (CFD) Auwal Dodo*, Valente Hernandez-Perez, Je Zhu and Saffa Rffat Faculty of Engneerng,
More informationNumerical Analysis and Optimization on Vortex Shedder by the Linearity of Strouhal Number against Reynold Number
Internatonal Journal of Materals, Mechancs and Manufacturng, Vol. 4, No. 3, August 2016 Numercal Analyss and Optmzaton on Vortex Shedder by the Lnearty of Strouhal Number aganst Reynold Number Su Myat
More informationNON-CENTRAL 7-POINT FORMULA IN THE METHOD OF LINES FOR PARABOLIC AND BURGERS' EQUATIONS
IJRRAS 8 (3 September 011 www.arpapress.com/volumes/vol8issue3/ijrras_8_3_08.pdf NON-CENTRAL 7-POINT FORMULA IN THE METHOD OF LINES FOR PARABOLIC AND BURGERS' EQUATIONS H.O. Bakodah Dept. of Mathematc
More informationOperating conditions of a mine fan under conditions of variable resistance
Paper No. 11 ISMS 216 Operatng condtons of a mne fan under condtons of varable resstance Zhang Ynghua a, Chen L a, b, Huang Zhan a, *, Gao Yukun a a State Key Laboratory of Hgh-Effcent Mnng and Safety
More informationAn Improved multiple fractal algorithm
Advanced Scence and Technology Letters Vol.31 (MulGraB 213), pp.184-188 http://dx.do.org/1.1427/astl.213.31.41 An Improved multple fractal algorthm Yun Ln, Xaochu Xu, Jnfeng Pang College of Informaton
More informationNumerical Transient Heat Conduction Experiment
Numercal ransent Heat Conducton Experment OBJECIVE 1. o demonstrate the basc prncples of conducton heat transfer.. o show how the thermal conductvty of a sold can be measured. 3. o demonstrate the use
More informationModule 3: The Whole-Process Perspective for Thermochemical Hydrogen
"Thermodynamc Analyss of Processes for Hydrogen Generaton by Decomposton of Water" by John P. O'Connell Department of Chemcal Engneerng Unversty of Vrgna Charlottesvlle, VA 2294-4741 A Set of Energy Educaton
More informationInternational Power, Electronics and Materials Engineering Conference (IPEMEC 2015)
Internatonal Power, Electroncs and Materals Engneerng Conference (IPEMEC 2015) Dynamc Model of Wnd Speed Dstrbuton n Wnd Farm Consderng the Impact of Wnd Drecton and Interference Effects Zhe Dong 1, a,
More informationA Numerical Study of Heat Transfer and Fluid Flow past Single Tube
A Numercal Study of Heat ransfer and Flud Flow past Sngle ube ZEINAB SAYED ABDEL-REHIM Mechancal Engneerng Natonal Research Center El-Bohos Street, Dokk, Gza EGYP abdelrehmz@yahoo.com Abstract: - A numercal
More informationThe Quadratic Trigonometric Bézier Curve with Single Shape Parameter
J. Basc. Appl. Sc. Res., (3541-546, 01 01, TextRoad Publcaton ISSN 090-4304 Journal of Basc and Appled Scentfc Research www.textroad.com The Quadratc Trgonometrc Bézer Curve wth Sngle Shape Parameter Uzma
More informationModule 1 : The equation of continuity. Lecture 1: Equation of Continuity
1 Module 1 : The equaton of contnuty Lecture 1: Equaton of Contnuty 2 Advanced Heat and Mass Transfer: Modules 1. THE EQUATION OF CONTINUITY : Lectures 1-6 () () () (v) (v) Overall Mass Balance Momentum
More informationAbstract. 1 Introduction
Numercal models for unsteady flow n ppe dvdng systems R. Klasnc," H. Knoblauch," R. Mader* ^ Department of Hydraulc Structures and Water Resources Management, Graz Unversty of Technology, A-8010, Graz,
More informationUncertainty in measurements of power and energy on power networks
Uncertanty n measurements of power and energy on power networks E. Manov, N. Kolev Department of Measurement and Instrumentaton, Techncal Unversty Sofa, bul. Klment Ohrdsk No8, bl., 000 Sofa, Bulgara Tel./fax:
More informationInductance Calculation for Conductors of Arbitrary Shape
CRYO/02/028 Aprl 5, 2002 Inductance Calculaton for Conductors of Arbtrary Shape L. Bottura Dstrbuton: Internal Summary In ths note we descrbe a method for the numercal calculaton of nductances among conductors
More informationModule 3 LOSSY IMAGE COMPRESSION SYSTEMS. Version 2 ECE IIT, Kharagpur
Module 3 LOSSY IMAGE COMPRESSION SYSTEMS Verson ECE IIT, Kharagpur Lesson 6 Theory of Quantzaton Verson ECE IIT, Kharagpur Instructonal Objectves At the end of ths lesson, the students should be able to:
More informationComputational Modelling of the Unbalanced Magnetic Pull by Finite Element Method
Avalable onlne at www.scencedrect.com Proceda Engneerng 48 (2012 ) 83 89 MMaMS 2012 Computatonal Modellng of the Unbalanced Magnetc Pull by Fnte Element Method Martn Donát a * a Brno Unversty of Technology,
More informationGlobal Sensitivity. Tuesday 20 th February, 2018
Global Senstvty Tuesday 2 th February, 28 ) Local Senstvty Most senstvty analyses [] are based on local estmates of senstvty, typcally by expandng the response n a Taylor seres about some specfc values
More informationFlow equations To simulate the flow, the Navier-Stokes system that includes continuity and momentum equations is solved
Smulaton of nose generaton and propagaton caused by the turbulent flow around bluff bodes Zamotn Krll e-mal: krart@gmal.com, cq: 958886 Summary Accurate predctons of nose generaton and spread n turbulent
More informationCHAPTER 5 NUMERICAL EVALUATION OF DYNAMIC RESPONSE
CHAPTER 5 NUMERICAL EVALUATION OF DYNAMIC RESPONSE Analytcal soluton s usually not possble when exctaton vares arbtrarly wth tme or f the system s nonlnear. Such problems can be solved by numercal tmesteppng
More informationThe Tangential Force Distribution on Inner Cylinder of Power Law Fluid Flowing in Eccentric Annuli with the Inner Cylinder Reciprocating Axially
Open Journal of Flud Dynamcs, 2015, 5, 183-187 Publshed Onlne June 2015 n ScRes. http://www.scrp.org/journal/ojfd http://dx.do.org/10.4236/ojfd.2015.52020 The Tangental Force Dstrbuton on Inner Cylnder
More informationChapter 13: Multiple Regression
Chapter 13: Multple Regresson 13.1 Developng the multple-regresson Model The general model can be descrbed as: It smplfes for two ndependent varables: The sample ft parameter b 0, b 1, and b are used to
More informationSimulation of Flow Pattern in Open Channels with Sudden Expansions
Research Journal of Appled Scences, Engneerng and Technology 4(19): 3852-3857, 2012 ISSN: 2040-7467 Maxwell Scentfc Organzaton, 2012 Submtted: May 11, 2012 Accepted: June 01, 2012 Publshed: October 01,
More informationComparative Studies of Law of Conservation of Energy. and Law Clusters of Conservation of Generalized Energy
Comparatve Studes of Law of Conservaton of Energy and Law Clusters of Conservaton of Generalzed Energy No.3 of Comparatve Physcs Seres Papers Fu Yuhua (CNOOC Research Insttute, E-mal:fuyh1945@sna.com)
More informationHigh resolution entropy stable scheme for shallow water equations
Internatonal Symposum on Computers & Informatcs (ISCI 05) Hgh resoluton entropy stable scheme for shallow water equatons Xaohan Cheng,a, Yufeng Ne,b, Department of Appled Mathematcs, Northwestern Polytechncal
More informationThe Study of Teaching-learning-based Optimization Algorithm
Advanced Scence and Technology Letters Vol. (AST 06), pp.05- http://dx.do.org/0.57/astl.06. The Study of Teachng-learnng-based Optmzaton Algorthm u Sun, Yan fu, Lele Kong, Haolang Q,, Helongang Insttute
More informationmodeling of equilibrium and dynamic multi-component adsorption in a two-layered fixed bed for purification of hydrogen from methane reforming products
modelng of equlbrum and dynamc mult-component adsorpton n a two-layered fxed bed for purfcaton of hydrogen from methane reformng products Mohammad A. Ebrahm, Mahmood R. G. Arsalan, Shohreh Fatem * Laboratory
More informationPrinciples of Food and Bioprocess Engineering (FS 231) Solutions to Example Problems on Heat Transfer
Prncples of Food and Boprocess Engneerng (FS 31) Solutons to Example Problems on Heat Transfer 1. We start wth Fourer s law of heat conducton: Q = k A ( T/ x) Rearrangng, we get: Q/A = k ( T/ x) Here,
More informationNote 10. Modeling and Simulation of Dynamic Systems
Lecture Notes of ME 475: Introducton to Mechatroncs Note 0 Modelng and Smulaton of Dynamc Systems Department of Mechancal Engneerng, Unversty Of Saskatchewan, 57 Campus Drve, Saskatoon, SK S7N 5A9, Canada
More informationCalculating the Quasi-static Pressures of Confined Explosions Considering Chemical Reactions under the Constant Entropy Assumption
Appled Mechancs and Materals Onlne: 202-04-20 ISS: 662-7482, ol. 64, pp 396-400 do:0.4028/www.scentfc.net/amm.64.396 202 Trans Tech Publcatons, Swtzerland Calculatng the Quas-statc Pressures of Confned
More informationComputational Analysis of Cavitating Marine Propeller Performance using OpenFOAM
Fourth Internatonal Symposum on Marne Propulsors smp 15, Austn, Texas, USA, June 2015 Workshop: Propeller Performance Computatonal Analyss of Cavtatng Marne Propeller Performance usng OpenFOAM Abolfazl
More informationOn the correction of the h-index for career length
1 On the correcton of the h-ndex for career length by L. Egghe Unverstet Hasselt (UHasselt), Campus Depenbeek, Agoralaan, B-3590 Depenbeek, Belgum 1 and Unverstet Antwerpen (UA), IBW, Stadscampus, Venusstraat
More informationA Hybrid Variational Iteration Method for Blasius Equation
Avalable at http://pvamu.edu/aam Appl. Appl. Math. ISSN: 1932-9466 Vol. 10, Issue 1 (June 2015), pp. 223-229 Applcatons and Appled Mathematcs: An Internatonal Journal (AAM) A Hybrd Varatonal Iteraton Method
More information( ) 1/ 2. ( P SO2 )( P O2 ) 1/ 2.
Chemstry 360 Dr. Jean M. Standard Problem Set 9 Solutons. The followng chemcal reacton converts sulfur doxde to sulfur troxde. SO ( g) + O ( g) SO 3 ( l). (a.) Wrte the expresson for K eq for ths reacton.
More informationCOMPARISON OF SOME RELIABILITY CHARACTERISTICS BETWEEN REDUNDANT SYSTEMS REQUIRING SUPPORTING UNITS FOR THEIR OPERATIONS
Avalable onlne at http://sck.org J. Math. Comput. Sc. 3 (3), No., 6-3 ISSN: 97-537 COMPARISON OF SOME RELIABILITY CHARACTERISTICS BETWEEN REDUNDANT SYSTEMS REQUIRING SUPPORTING UNITS FOR THEIR OPERATIONS
More informationThe Two-scale Finite Element Errors Analysis for One Class of Thermoelastic Problem in Periodic Composites
7 Asa-Pacfc Engneerng Technology Conference (APETC 7) ISBN: 978--6595-443- The Two-scale Fnte Element Errors Analyss for One Class of Thermoelastc Problem n Perodc Compostes Xaoun Deng Mngxang Deng ABSTRACT
More informationThermal State Investigations of Two-stage Thruster with Anode Layer
Thermal State Investgatons of Two-stage Thruster wth Anode Layer IEPC-2007-127 Presented at the 30 th Internatonal Electrc Propulson Conference, Florence, Italy Mtroshn A.S. *, Garkusha V.I., Semenkn A.V.
More informationAir Age Equation Parameterized by Ventilation Grouped Time WU Wen-zhong
Appled Mechancs and Materals Submtted: 2014-05-07 ISSN: 1662-7482, Vols. 587-589, pp 449-452 Accepted: 2014-05-10 do:10.4028/www.scentfc.net/amm.587-589.449 Onlne: 2014-07-04 2014 Trans Tech Publcatons,
More informationCOMPOSITE BEAM WITH WEAK SHEAR CONNECTION SUBJECTED TO THERMAL LOAD
COMPOSITE BEAM WITH WEAK SHEAR CONNECTION SUBJECTED TO THERMAL LOAD Ákos Jósef Lengyel, István Ecsed Assstant Lecturer, Professor of Mechancs, Insttute of Appled Mechancs, Unversty of Mskolc, Mskolc-Egyetemváros,
More informationThermo-Calc Software. Modelling Multicomponent Precipitation Kinetics with CALPHAD-Based Tools. EUROMAT2013, September 8-13, 2013 Sevilla, Spain
Modellng Multcomponent Precptaton Knetcs wth CALPHAD-Based Tools Kasheng Wu 1, Gustaf Sterner 2, Qng Chen 2, Åke Jansson 2, Paul Mason 1, Johan Bratberg 2 and Anders Engström 2 1 Inc., 2 AB EUROMAT2013,
More informationIC Engine Flow Simulation using KIVA code and A Modified Reynolds Stress Turbulence Model
IC Engne Flow Smulaton usng KIVA code and A Modfed Reynolds Stress Turbulence Model Satpreet Nanda and S.L. Yang Mechancal Engneerng-Engneerng Mechancs Department Mchgan Technologcal Unversty Houghton,
More informationLab 2e Thermal System Response and Effective Heat Transfer Coefficient
58:080 Expermental Engneerng 1 OBJECTIVE Lab 2e Thermal System Response and Effectve Heat Transfer Coeffcent Warnng: though the experment has educatonal objectves (to learn about bolng heat transfer, etc.),
More informationTensor Smooth Length for SPH Modelling of High Speed Impact
Tensor Smooth Length for SPH Modellng of Hgh Speed Impact Roman Cherepanov and Alexander Gerasmov Insttute of Appled mathematcs and mechancs, Tomsk State Unversty 634050, Lenna av. 36, Tomsk, Russa RCherepanov82@gmal.com,Ger@npmm.tsu.ru
More informationFORCED CONVECTION HEAT TRANSFER FROM A RECTANGULAR CYLINDER: EFFECT OF ASPECT RATIO
ISTP-,, PRAGUE TH INTERNATIONAL SYMPOSIUM ON TRANSPORT PHENOMENA FORCED CONVECTION HEAT TRANSFER FROM A RECTANGULAR CYLINDER: EFFECT OF ASPECT RATIO Mohammad Rahnama*, Seyed-Mad Hasheman*, Mousa Farhad**
More informationCIE4801 Transportation and spatial modelling Trip distribution
CIE4801 ransportaton and spatal modellng rp dstrbuton Rob van Nes, ransport & Plannng 17/4/13 Delft Unversty of echnology Challenge the future Content What s t about hree methods Wth specal attenton for
More informationThree-Phase Distillation in Packed Towers: Short-Cut Modelling and Parameter Tuning
European Symposum on Computer Arded Aded Process Engneerng 15 L. Pugjaner and A. Espuña (Edtors) 2005 Elsever Scence B.V. All rghts reserved. Three-Phase Dstllaton n Packed Towers: Short-Cut Modellng and
More informationPhysics 181. Particle Systems
Physcs 181 Partcle Systems Overvew In these notes we dscuss the varables approprate to the descrpton of systems of partcles, ther defntons, ther relatons, and ther conservatons laws. We consder a system
More informationA Robust Method for Calculating the Correlation Coefficient
A Robust Method for Calculatng the Correlaton Coeffcent E.B. Nven and C. V. Deutsch Relatonshps between prmary and secondary data are frequently quantfed usng the correlaton coeffcent; however, the tradtonal
More informationErrors for Linear Systems
Errors for Lnear Systems When we solve a lnear system Ax b we often do not know A and b exactly, but have only approxmatons  and ˆb avalable. Then the best thng we can do s to solve ˆx ˆb exactly whch
More informationResearch & Reviews: Journal of Engineering and Technology
Research & Revews: Journal of Engneerng and Technology Case Study to Smulate Convectve Flows and Heat Transfer n Arcondtoned Spaces Hussen JA 1 *, Mazlan AW 1 and Hasanen MH 2 1 Department of Mechancal
More informationOptimal Control of Temperature in Fluid Flow
Kawahara Lab. 5 March. 27 Optmal Control of Temperature n Flud Flow Dasuke YAMAZAKI Department of Cvl Engneerng, Chuo Unversty Kasuga -3-27, Bunkyou-ku, Tokyo 2-855, Japan E-mal : d33422@educ.kc.chuo-u.ac.jp
More informationOrientation Model of Elite Education and Mass Education
Proceedngs of the 8th Internatonal Conference on Innovaton & Management 723 Orentaton Model of Elte Educaton and Mass Educaton Ye Peng Huanggang Normal Unversty, Huanggang, P.R.Chna, 438 (E-mal: yepeng@hgnc.edu.cn)
More informationNormally, in one phase reservoir simulation we would deal with one of the following fluid systems:
TPG4160 Reservor Smulaton 2017 page 1 of 9 ONE-DIMENSIONAL, ONE-PHASE RESERVOIR SIMULATION Flud systems The term sngle phase apples to any system wth only one phase present n the reservor In some cases
More information829. An adaptive method for inertia force identification in cantilever under moving mass
89. An adaptve method for nerta force dentfcaton n cantlever under movng mass Qang Chen 1, Mnzhuo Wang, Hao Yan 3, Haonan Ye 4, Guola Yang 5 1,, 3, 4 Department of Control and System Engneerng, Nanng Unversty,
More informationWeek3, Chapter 4. Position and Displacement. Motion in Two Dimensions. Instantaneous Velocity. Average Velocity
Week3, Chapter 4 Moton n Two Dmensons Lecture Quz A partcle confned to moton along the x axs moves wth constant acceleraton from x =.0 m to x = 8.0 m durng a 1-s tme nterval. The velocty of the partcle
More informationA New Evolutionary Computation Based Approach for Learning Bayesian Network
Avalable onlne at www.scencedrect.com Proceda Engneerng 15 (2011) 4026 4030 Advanced n Control Engneerng and Informaton Scence A New Evolutonary Computaton Based Approach for Learnng Bayesan Network Yungang
More informationSupplemental Material: Causal Entropic Forces
Supplemental Materal: Causal Entropc Forces A. D. Wssner-Gross 1, 2, and C. E. Freer 3 1 Insttute for Appled Computatonal Scence, Harvard Unversty, Cambrdge, Massachusetts 02138, USA 2 The Meda Laboratory,
More informationModeling of Breakage Equations Using PBE Software
Modelng of Breakage Equatons Usng PBE Software Prsclla Hll 1 Abstract Partcle breakage occurs n a varety of processng unts n chemcal processng rangng from crushers and grnders to breakage of partcles n
More informationAn Experimental and Numerical Study on Pressure Drop Coefficient of Ball Valves
A. Ozdomar, K. Turgut Gursel, Y. Pekbey, B. Celkag / Internatonal Energy Journal 8 (2007) An Expermental and Numercal Study on Pressure Drop Coeffcent of Ball Valves www.serd.at.ac.th/rerc A. Ozdamar*
More informationPREDICTIVE CONTROL BY DISTRIBUTED PARAMETER SYSTEMS BLOCKSET FOR MATLAB & SIMULINK
PREDICTIVE CONTROL BY DISTRIBUTED PARAMETER SYSTEMS BLOCKSET FOR MATLAB & SIMULINK G. Hulkó, C. Belavý, P. Buček, P. Noga Insttute of automaton, measurement and appled nformatcs, Faculty of Mechancal Engneerng,
More informationThe Minimum Universal Cost Flow in an Infeasible Flow Network
Journal of Scences, Islamc Republc of Iran 17(2): 175-180 (2006) Unversty of Tehran, ISSN 1016-1104 http://jscencesutacr The Mnmum Unversal Cost Flow n an Infeasble Flow Network H Saleh Fathabad * M Bagheran
More informationPower law and dimension of the maximum value for belief distribution with the max Deng entropy
Power law and dmenson of the maxmum value for belef dstrbuton wth the max Deng entropy Bngy Kang a, a College of Informaton Engneerng, Northwest A&F Unversty, Yanglng, Shaanx, 712100, Chna. Abstract Deng
More informationWinter 2008 CS567 Stochastic Linear/Integer Programming Guest Lecturer: Xu, Huan
Wnter 2008 CS567 Stochastc Lnear/Integer Programmng Guest Lecturer: Xu, Huan Class 2: More Modelng Examples 1 Capacty Expanson Capacty expanson models optmal choces of the tmng and levels of nvestments
More information1-Dimensional Advection-Diffusion Finite Difference Model Due to a Flow under Propagating Solitary Wave
014 4th Internatonal Conference on Future nvronment and nergy IPCB vol.61 (014) (014) IACSIT Press, Sngapore I: 10.776/IPCB. 014. V61. 6 1-mensonal Advecton-ffuson Fnte fference Model ue to a Flow under
More informationDesign and Optimization of Fuzzy Controller for Inverse Pendulum System Using Genetic Algorithm
Desgn and Optmzaton of Fuzzy Controller for Inverse Pendulum System Usng Genetc Algorthm H. Mehraban A. Ashoor Unversty of Tehran Unversty of Tehran h.mehraban@ece.ut.ac.r a.ashoor@ece.ut.ac.r Abstract:
More informationEnergy configuration optimization of submerged propeller in oxidation ditch based on CFD
IOP Conference Seres: Earth and Envronmental Scence Energy confguraton optmzaton of submerged propeller n oxdaton dtch based on CFD To cte ths artcle: S Y Wu et al 01 IOP Conf. Ser.: Earth Envron. Sc.
More informationA PROBABILITY-DRIVEN SEARCH ALGORITHM FOR SOLVING MULTI-OBJECTIVE OPTIMIZATION PROBLEMS
HCMC Unversty of Pedagogy Thong Nguyen Huu et al. A PROBABILITY-DRIVEN SEARCH ALGORITHM FOR SOLVING MULTI-OBJECTIVE OPTIMIZATION PROBLEMS Thong Nguyen Huu and Hao Tran Van Department of mathematcs-nformaton,
More informationAP Physics 1 & 2 Summer Assignment
AP Physcs 1 & 2 Summer Assgnment AP Physcs 1 requres an exceptonal profcency n algebra, trgonometry, and geometry. It was desgned by a select group of college professors and hgh school scence teachers
More informationCHAPTER IV RESEARCH FINDING AND ANALYSIS
CHAPTER IV REEARCH FINDING AND ANALYI A. Descrpton of Research Fndngs To fnd out the dfference between the students who were taught by usng Mme Game and the students who were not taught by usng Mme Game
More informationA large scale tsunami run-up simulation and numerical evaluation of fluid force during tsunami by using a particle method
A large scale tsunam run-up smulaton and numercal evaluaton of flud force durng tsunam by usng a partcle method *Mtsuteru Asa 1), Shoch Tanabe 2) and Masaharu Isshk 3) 1), 2) Department of Cvl Engneerng,
More informationCalculation of Aerodynamic Characteristics of NACA 2415, 23012, Airfoils Using Computational Fluid Dynamics (CFD)
Calculaton of Aerodynamc Characterstcs of NACA 2415, 23012, 23015 Arfols Usng Computatonal Flud Dynamcs (CFD) Hmanshu Parashar Abstract A method of solvng the flow over arfols of Natonal Advsory Commttee
More informationNumerical Analysis of Heat Transfer and Pressure Drop in a Channel Equipped with Triangular Bodies in Side-By-Side Arrangement
mercal Analyss of Heat Transfer and Pressure Drop n a Channel Equpped wth Trangular Bodes n Sde-By-Sde Arrangement E. Manay Department of Mechancal Engneerng, Faculty of Engneerng, Bayburt Unversty, Bayburt,
More informationChapter 5. Solution of System of Linear Equations. Module No. 6. Solution of Inconsistent and Ill Conditioned Systems
Numercal Analyss by Dr. Anta Pal Assstant Professor Department of Mathematcs Natonal Insttute of Technology Durgapur Durgapur-713209 emal: anta.bue@gmal.com 1 . Chapter 5 Soluton of System of Lnear Equatons
More informationPARTICIPATION FACTOR IN MODAL ANALYSIS OF POWER SYSTEMS STABILITY
POZNAN UNIVE RSITY OF TE CHNOLOGY ACADE MIC JOURNALS No 86 Electrcal Engneerng 6 Volodymyr KONOVAL* Roman PRYTULA** PARTICIPATION FACTOR IN MODAL ANALYSIS OF POWER SYSTEMS STABILITY Ths paper provdes a
More informationA new Approach for Solving Linear Ordinary Differential Equations
, ISSN 974-57X (Onlne), ISSN 974-5718 (Prnt), Vol. ; Issue No. 1; Year 14, Copyrght 13-14 by CESER PUBLICATIONS A new Approach for Solvng Lnear Ordnary Dfferental Equatons Fawz Abdelwahd Department of
More informationCopyright 2017 by Taylor Enterprises, Inc., All Rights Reserved. Adjusted Control Limits for P Charts. Dr. Wayne A. Taylor
Taylor Enterprses, Inc. Control Lmts for P Charts Copyrght 2017 by Taylor Enterprses, Inc., All Rghts Reserved. Control Lmts for P Charts Dr. Wayne A. Taylor Abstract: P charts are used for count data
More informationAnalysis of the Magnetomotive Force of a Three-Phase Winding with Concentrated Coils and Different Symmetry Features
Analyss of the Magnetomotve Force of a Three-Phase Wndng wth Concentrated Cols and Dfferent Symmetry Features Deter Gerlng Unversty of Federal Defense Munch, Neubberg, 85579, Germany Emal: Deter.Gerlng@unbw.de
More informationDurban Watson for Testing the Lack-of-Fit of Polynomial Regression Models without Replications
Durban Watson for Testng the Lack-of-Ft of Polynomal Regresson Models wthout Replcatons Ruba A. Alyaf, Maha A. Omar, Abdullah A. Al-Shha ralyaf@ksu.edu.sa, maomar@ksu.edu.sa, aalshha@ksu.edu.sa Department
More informationElectrical double layer: revisit based on boundary conditions
Electrcal double layer: revst based on boundary condtons Jong U. Km Department of Electrcal and Computer Engneerng, Texas A&M Unversty College Staton, TX 77843-318, USA Abstract The electrcal double layer
More informationNUMERICAL SIMULATION OF FLOW OVER STEPPED SPILLWAYS
ISSN: 345-3109 RCEE Research n Cvl and Envronmental Engneerng www.rcee.com Research n Cvl and Envronmental Engneerng 014 (04) 190-198 NUMERICAL SIMULATION OF FLOW OVER STEPPED SPILLWAYS Rasoul Daneshfaraz
More informationIntegrated approach in solving parallel machine scheduling and location (ScheLoc) problem
Internatonal Journal of Industral Engneerng Computatons 7 (2016) 573 584 Contents lsts avalable at GrowngScence Internatonal Journal of Industral Engneerng Computatons homepage: www.growngscence.com/ec
More informationCHAPTER IV RESEARCH FINDING AND DISCUSSIONS
CHAPTER IV RESEARCH FINDING AND DISCUSSIONS A. Descrpton of Research Fndng. The Implementaton of Learnng Havng ganed the whole needed data, the researcher then dd analyss whch refers to the statstcal data
More informationDUE: WEDS FEB 21ST 2018
HOMEWORK # 1: FINITE DIFFERENCES IN ONE DIMENSION DUE: WEDS FEB 21ST 2018 1. Theory Beam bendng s a classcal engneerng analyss. The tradtonal soluton technque makes smplfyng assumptons such as a constant
More informationConstruction of Serendipity Shape Functions by Geometrical Probability
J. Basc. Appl. Sc. Res., ()56-56, 0 0, TextRoad Publcaton ISS 00-0 Journal of Basc and Appled Scentfc Research www.textroad.com Constructon of Serendpty Shape Functons by Geometrcal Probablty Kamal Al-Dawoud
More informationTurbulent Flow. Turbulent Flow
http://www.youtube.com/watch?v=xoll2kedog&feature=related http://br.youtube.com/watch?v=7kkftgx2any http://br.youtube.com/watch?v=vqhxihpvcvu 1. Caothc fluctuatons wth a wde range of frequences and
More informationOne-sided finite-difference approximations suitable for use with Richardson extrapolation
Journal of Computatonal Physcs 219 (2006) 13 20 Short note One-sded fnte-dfference approxmatons sutable for use wth Rchardson extrapolaton Kumar Rahul, S.N. Bhattacharyya * Department of Mechancal Engneerng,
More informationInfluence of strut structure on hemodynamic characteristics by the boundary elementary method
Boundary Elements and Other Mesh ducton Methods XXXVI 471 Influence of strut structure on hemodynamc characterstcs by the boundary elementary method Hongme Peng Physcs and Electronc Informaton College
More informationSIMULATION OF SOUND WAVE PROPAGATION IN TURBULENT FLOWS USING A LATTICE-BOLTZMANN SCHEME. Abstract
SIMULATION OF SOUND WAVE PROPAGATION IN TURBULENT FLOWS USING A LATTICE-BOLTZMANN SCHEME PACS REFERENCE: 43.20.Mv Andreas Wlde Fraunhofer Insttut für Integrerte Schaltungen, Außenstelle EAS Zeunerstr.
More informationIntroduction to Vapor/Liquid Equilibrium, part 2. Raoult s Law:
CE304, Sprng 2004 Lecture 4 Introducton to Vapor/Lqud Equlbrum, part 2 Raoult s Law: The smplest model that allows us do VLE calculatons s obtaned when we assume that the vapor phase s an deal gas, and
More informationO 2 ( 1 ) PRODUCTION AND OXYGEN-IODINE KINETICS IN FLOWING AFTERGLOWS FOR ELECTRICALLY EXCITED CHEMICAL-OXYGEN-IODINE LASERS*
O 2 ( 1 ) PRODUCTION AND OXYGEN-IODINE KINETICS IN FLOWING AFTERGLOWS FOR ELECTRICALLY EXCITED CHEMICAL-OXYGEN-IODINE LASERS* Ramesh Arakon, Natala Y. Babaeva, and Mark J. Kushner Ames, IA 50011, USA arakon@astate.edu
More informationTransfer Functions. Convenient representation of a linear, dynamic model. A transfer function (TF) relates one input and one output: ( ) system
Transfer Functons Convenent representaton of a lnear, dynamc model. A transfer functon (TF) relates one nput and one output: x t X s y t system Y s The followng termnology s used: x y nput output forcng
More informationMessage modification, neutral bits and boomerangs
Message modfcaton, neutral bts and boomerangs From whch round should we start countng n SHA? Antone Joux DGA and Unversty of Versalles St-Quentn-en-Yvelnes France Jont work wth Thomas Peyrn 1 Dfferental
More informationERROR RESEARCH ON A HEPA FILTER MEDIA TESTING SYSTEM OF MPPS(MOST PENETRATION PARTICLE SIZE) EFFICIENCY
Proceedngs: Indoor Ar 2005 ERROR RESEARCH ON A HEPA FILTER MEDIA TESTING SYSTEM OF MPPS(MOST PENETRATION PARTICLE SIZE) EFFICIENCY S Lu, J Lu *, N Zhu School of Envronmental Scence and Technology, Tanjn
More informationSpeeding up Computation of Scalar Multiplication in Elliptic Curve Cryptosystem
H.K. Pathak et. al. / (IJCSE) Internatonal Journal on Computer Scence and Engneerng Speedng up Computaton of Scalar Multplcaton n Ellptc Curve Cryptosystem H. K. Pathak Manju Sangh S.o.S n Computer scence
More information