Fluid machinery and fluid mechnics

Tai ngay!!! Ban co the xoa d Jianzhong Xu Yulin Wu Yangjun Zhang Junyue Zhang Fluid Machinery and Fluid Mechanics 4th International Symposium (4th ISFMFE) Jianzhong Xu Yulin Wu Yangjun Zhang Junyue Zhang Fluid Machinery and Fluid Mechanics 4th International Symposium (4th ISFMFE) With 626 figures ,,,, TSINGHUA ~> UNiVERSITY PRESS ~ Springer EDITORS: Prof.Jianzhong XU CSET ChineseAcademy of Sciences No.11 Bei Si Huan Xi Lu 100190,Beijing, China Prof.Yangjun ZHANG Departmentof AutomotiveEngineering TsinghuaUniversity 100084,Beijing, China Prof.Yulin WU Department of Thermal Engineering TsinghuaUniversity 100084,Beijing, China Prof.Junyue ZHANG National Key Laboratory of Diesel Engine Turbocharging Technology P.O.Box 22 030706, Datong, Shanxi, China ISBN 978-7-302-18728-8 Tsinghua University Press, Beijing ISBN 978-3-54~-89748-4 Springer Berlin Heidelberg New York e ISBN 978-3-540-89749-1 Springer Berlin Heidelberg New York Library of Congress Control Number: 2008940137 This work is subject to copyright All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks Duplication of this publication or parts thereofis permitted onlyunderthe provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag Violations are liable to prosecution under the German Copyright Law © 2009Tsinghua University Press,Beijing and Springer-Verlag GmbH BerlinHeidelberg Co-published by Tsinghua University Press, Beijing and Springer-Verlag GmbH Berlin Heidelberg Springer is a part of Springer Science+Business Media springer.com The use of general descriptive names, registered names, trademarks, etc in this publication does not imply, even in the absence of a specific statement, that suchnames are exempt from the relevant protective lawsandregulations andtherefore free for general use Coverdesign: FridoSteinen-Broo, EStudio Ca1amar, Spain Printed on acid-free paper ORGANIZING COMMITTEE Chairman JianzhongXU (ChineseAcademyof Sciences) Vice Chairmen Kangmin CHEN, Chuanggang GU, Leqin WANG, ZengquanWang, ZhongqiWANG, Yulin WU, Guang XI, ShuyongZHANG, YangjunZHANG, Xiaolu ZHAO General Secretary Xingqi LUO Secretary HongyingKE INTERNATIONAL TECHNICAL COMMITTEE AVELLANFrancois BOHN Dieter E DICK Erik EGUSQUIZA Eduard GAJIC Aleksandar GOTO Akira GOULAS Apostolos HAYAMI Hiroshi HELLMANN D H IKOHAGIToshiaki, KATO Chisachi KIM KwangHo KIM Kwang Yong LEE YoungHo SUN Zixiang TSUJIMOTO Yoshi TSUKAMOTO Hiroshi WALKERG.J WINOTOS.H INTERNATIONAL ADVISORY COMMITTEE AHMEDRafiuddinM BOHLE Martin CHUNGJin Taek FRISCHKORN Petra FURUKAWA Akinori KIM Man Eung KIMYounJea KOUIDRI Smaine LEEDae Sung LEE Tea Seak MARTINEZ-BOTAS R MATSUMOTO Y MIYAGAWAK NISHI Michihiro OHMinHwan SERRANO J R SHIN Byeong Rog SHYYWei SUSAN-RESIGA Romeo WU Jingchun YOON Joon Yong FOREWORD Following the experience gained in organizing the International Symposium on Fluid Machinery and Fluid Engineering in 1996,2000 and 2004, it was decided to hold the Fourth International Symposium on Fluid Machinery and Fluid Engineering This fourth symposium is now to convene on November 25-27 in Beijing The Chinese Society of Engineering Thermophysics (CSET) is a well-established engineering society devoted to theoretical and applied research in the thermal and fluid sciences It was first founded by the late Dr C.H Wu, wellknown leader in the field of turbomachinery The Chinese Society of Engineering Thermophysics (CSET) organized the First, the Second and the Third International Symposium on Fluid Machinery and Fluid Engineering, in 1996, in 2000, and in 2004 successfully Fluid machinery is a kind of widely used machines and has a great action to all fields of the national economy The purpose of the Fourth Symposium is the same as before, to provide a common forum for exchange of scientific and technical information worldwide on fluid machinery and fluid engineering for scientists and engineers The main subject of this symposium is "Fluid Machinery for Energy saving" There is the "Mei lecture" in the symposium to make reports on the development and the new research area of fluid machinery in order to commemorate the late professor Mei Zuyan in the field of fluid machinery in China This volume of proceedings contains 69 highly informative technical papers that have been selected by peer review and are to be presented at the Mei lecture session and the technical sessions of the symposium They cover very well the latest practice and findings in the fields of fluid machinary and fluid engineering Jianzhong XU, Professor Chairman of the Organizing Committee September 2008 CONTENTS Invited Mei Lecture Session Heat Transfer in an Automotive TurbochargerUnder ConstantLoad Points: an Experimentaland Computational Investigation A Romagnoli, R.M.F Botas 1-7 Multi-Scale Thermal Measurementand Design of Cooling Systems in Gas Turbine Hyung Hee Cho, Kyung Min Kim, Sangwoo Shin, Beom Seok Kim and Dong Hyun Lee 8-13 Reduced Size Bi-Flow Centrifugal Pump as Ventricular Assist Device for End-StagePatients Andy C C Tan 14-19 ExperimentalInvestigation of Wall Pressure Fluctuations in Axial Flow Fans with Different Swept J Hurault, S Kouidri, F Bakir and R Rey 20-26 Meso and Macro-Scales Fluid Flow Simulationswith Lattice BoltzmannMethod A.A Mohamad 27-32 Engineering Flow Performanceby Local Dynamics: Theories and Applications Jiezhi Wu, Feng Mao, Weidong Su, Hong Wu and Qiushi Li 33-43 One-Dimensional Analysis of Full Load Draft Tube Surge Yoshinobu Tsujimoto, Koichi Yonezawa, Changkun Chen 44-56 Future Aspects and'Developmentsfor Advanced CO2-Free Power Station Technologies D Bohn 57-65 Numerical Analysis of Impeller-Volute Tongue Interaction and Unsteady Fluid Flow in a CentrifugalPump 66-71 K.W Cheah, T.S Lee, S.H Winoto and Z.M Zhao 10 A Procedure for the Unsteady Characterizationof Turbochargers in ReciprocatingInternal CombustionEngines A Torregrosa, J Galindo, J.R Serrano and A Tiseira 72-79 11 Cavitation and Turbopump Hydrodynamics Research at Alta S.P.A and Pisa University Angelo Cervone, Lucio Torre, Angelo Pasini and Luca d' Agostino 80-88 12 Decelerated Swirling Flow Control in the Discharge Cone of Francis Turbines Romeo Susan-Resigaand SebastianMuntean 89-96 13 Hydraulic Oscillations Caused by the Earthquake Aleksandar Gajic 97-106 Fundament and Analysis 14 A Numerical Investigation of the Effect of End-Wall Boundary Layer Skew on the Aerodynamic Performanceof a Low Aspect Ratio, High Turning CompressorCascade Martin Bohle, Udo Stark 15 Design and Analysis of a Radial Turbine with Back Swept Blading Liam Barr, Stephen Spence and Paul Eynon 16 Swirl Flow and Heat Transfer Through Square Duct with Twisted Tape Insert Ho-Keun Kang, Soo-Whan Ahn, Bachtiar-Krishna-Putra Ary and Jong-WoongChoi 17 Multi-ObjectiveAutomated Optimizationof Centrifugal Impeller Using Genetic Algorithm Wenbin Zhang, Xiaomin Liu 18 AxisymmetricWeakly CompressibleTransient Pipe Flow and Water Hammer Control Lijun Xuan, Feng Mao and Jiezhi Wu 19 Research on the OptimizationMethod of Impeller Meridional Contour and 3-D Blade Jinling Lu, Guang Xi and Xingqi Luo 111 107-114 115-121 122-129 130-136 137-144 145-152 Experimental Study 20 LDV and PIV Techniques Appliedto Turbomachinery Geometry Constrains G Bois, P Dupont, A Dazin and G Caignaert 21 Limiting Streamlines Measurement in Contra-Rotating Axial Flow Pump AkinoriFurukawa, SatoshiUsami, YusukeTsunenari, SatoshiWatanabe and Kusuo Okuma 22 Experimental Modeling of PollutedAir Dispersion in Street Canyons of Metropolitan Hyoung-June Kim, Joon-Yong Yoon and Nak-Won Sung 23 PIV Studyof Tip Leakage Flow in Linear Compressor Cascade Ren Dai, Zhonghua Huang,Ze Chen and Kangmin Chen 24 Studyon Cavitating TurbulentFlow arounda Hydrofoil Mindi Zhang,GuoyuWang and Xiangbin Li 153-160 161-166 167-172 173-178 179-184 Numerical Simulation 25 Microchannel Heat Sinking: Analysisand Optimization Afzal Husain, Kwang-Yong Kim 26 A Numerical Simulation of a Flow in Pem Fuel Cell Stack Using Lattice BoltzmannMethod Jae-Hoon Lee, Seok-Yun Jeon, Joon-Yong Yoon, Sung-Joon Byun and Myung-Seob Shin 27 Simulation of Gas Flow in a Microchannel by Lattice BoltzmannMethod In-WonPark, Myung-Seob Shin, Sung-Joon Byun, Joon-Yong Yoon 28 NumericalSolutionofNavier-Stokes Equations for Separating and Reattaching Flow over a Double Steps Expansion and Contraction KhaledAlhussan 29 Computation of SeveralTurbulentFlowswith the Des-Sa Model Yang Guo, Chisachi Kato, YoshinobuYamadeand Hong Wang 30 Comparative Studyof Turbulence Modelsin Separated-Attached DiffuserFlow Liu Chen, Ailing Yang, Ren Dai and Kangmin Chen 31 Simulating the Blood Flow for the Aorta with a Stenosis Ying Li, XianwuLuo, MingkuiZhang,Yao Zhang, Shuhong Liu and Hongyuan Xu 185-190 191-194 195-200 201-205 206-214 215-220 221-226 Turbocharger 32 ThroughFlow Models for EngineTurbocharging and ExhaustHeat Recovery YangjunZhang,Weilin Zhuge, Shuyong Zhang and Jianzhong Xu 33 Study on the Seal Leakageof Turbocharger Hong He, SiyouXu, RuiqianYan and Jianbo Ji 34 Study on the Pre-Tightening Force About the Nut of the Turbocharger Shaft Li Long, Hong He and Wei Pei 35 VibrationPropertyAnalysisof Turbocharger TurbineBlade Under DifferentLoads Wei Pei, Dongmei Zhang and JizhongZhang 36 A Methodto Solve the Problem of the Application of Ti-AITurbine XiujuanWang 227-233 234-237 238-241 242-245 246-248 Compressor and Fan 37 A Study on Rotor Blades for a Two-Stage Jet Fan Michihiro Nishi, KouichiYoshida, MinoruOkamoto and HiroyasuNakayama IV 249-254 The 4th International Symposium on Fluid Machinery and Fluid Engineering November 24-27, 2008, Beijing, China NO 4ISFMFE·Ch17 Influence of the Floating-Ring Bearing Parameters on Stability of Turbocharge Rotor-Bearing System Xinjun Zhao*, Hong He and Siyou Xu • NationalKey Lab of Diesel EngineTurbo-charging Tech P.O.B 22, Datong Shanxi,037036, China Tel: +86-352-5362096 / Fax: +86-352-5362085 E-mail:kunpeng_zhao@163.com Abstract In the paper, the finite element computational model of rotor-bearing system is presented using the software DyRoBeS Based on the numerical simulating method, dynamical characteristics in the different working conditions of bearing are analyzed such as span, width, gap and so on By the theoretical analysis of critical speed and spectrum cascades, the changing rule of stability of the rotor system and the reason of oil whirl and oil whip are discovered The influence of parameters on the system stability is different, and the significant effect is attained by one or two parameters The investigation is helpful to design the bearing and optimize the rotor-bearing system in a turbocharger Keywords floating-ring bearing, turbocharger, stability Nomenclature ex L Ly S Sy lJl £5 1y £52 £52y The first critical speed in station X (r/min) The width of bearing (mm) The width of bearing in state Y (mm) The span of two bearings (mm) The span of two bearings in state Y(mm) The inner gap of bearing (mm) The inner gap of bearing in state Y (mm) The outer gap of bearing (mm) The outer gap of bearing in state Y (mm) material Introduction At present, the stability of rotor system has been the emphases of study in the domain of rotor dynamics However, the most investigation was focused on the study of large-scale low-speed rotor system (such as turbogenerator rotor system), not the instability study of highspeed turbocharger rotor system The rotational speed of the turbocharger rotor in this paper reaches 100,000rpm, and there is strong connection between the stability of rotor-bearing system and the stability of turbocharger Therefore, the stability of a turbocharger rotor system is investigated by using the method of adjusting floatingring parameters in this paper Computational Results of Rotor-Bearing System In the paper, the finite element computational model of rotor-bearing system is presented using the software DyRoBeS Based on the numerical simulating method, dynamical characteristics of different working condition of bearing is computed such as span, width, gap and so on By the analysis of critical speed and spectrum cascades, it is the changing rule of stability of rotor system and the reason of oil whirl and oil whip that are found The computational model of the rotor-bearing system is shown in Fig 1, and it mainly consists of a nut (station 1), compressor impeller (left), shaft, floating-ring bearings and turbine impeller (right) Based on changing one parameter of bearing in the computation, it is obtained that the relation between parameter and stability Because of station far from the bearing, the amplitude at this station is bigger than that at other stations In the test the vibration characteristic at this station also represents the characteristic of the whole rotor-bearing system, so the vibration spectrum cascade in station represents the rotor-bearing system's characteristic in the paper phenomenon it can be sure that the vibration characteristic is basically same in these conditions , and the amplitude of the fundamental frequency vibration keep stable So the amplitude of vibration is mainly affected by the unbalance of rotor Although the vibration rule is approximately uniform, the rotational speed of low frequency vibration threshold, namely rotational speed of oil whirl, increases gradually with augment of S(from 44000 rpm in Fig 3(1) to 60000 rpm in Fig 3(3)) It is helpful for the stability of rotor-bearing system to increase span, but the impact is not evident Vibr ati on Spectrum Cascade ]1 Fig Finite element model 2.1 Influence of Span on Stability In this computational model only the span is changed A typical data set consisting of the span and the first critical speed at the different stations is shown in Fig It is shown that C], C, and C9 linearly increase with augment of span, but the increment are slight The difference between C and Cs is small, but either of them is bigger than C9 8- ! ] 08 92000 'a0' 06 72000~ S O 04 52000.8 ~ O 32000~ 02 o 12000 118 27 53160 7'314'3105138 Fr e qen cy/ cpm Vi br a t i on Spectr um Cascade r The Infl tm.enc e o f Sllllll on t)u, Cr i ti,~l SlI" d e ":a ~ :;}l500 SolOO O 33500 33(1)0 32~)0 ';l 32(1)0 ;: 31 ~IO 'i:: 31(1)0 'j :'»)50 ~ -'- _ _ ~ - "" _ -" " .- -c- I ~, I ~ OE-02 j _ , • C ; I • I I -+ I I i :'»)((10 (: OE- 'a OE- 02 ~ (: ~• OE- 02 '32000 72000~ 1111111I111 52000 32000 ~ O.O E+ OO 12000 11 81 5'38'3 07'3 756 05 lE+ 05 ~9 1; 50 I; 51 I; 52 I; 53 I; ~ I; "0 Frequency/ cpm I ~~)O ~ 8- 55 I; Vi br a t i on Spectrum Cascade SlI~nllTlT1 S.•- S=2 Fig The influence of span on the critical speed For computational cases the vibration spectrum cascades are shown in Fig It is obvious that the change set is almost uniform in plots, and the amplitudes of fundamental frequency vibration persist in the range of all the velocity The amplitudes of low frequency vibration not appear until in the range of high velocity, which increase rapidly and exceed the amplitude of the fundamental frequency vibration in the identical velocity When rotational speed sequentiallyincreases,the amplitudes of low frequency vibration decrease suddenly From the ~ ] OE-02 ] 48 O E-02 I i 'a OE-02 ~ l l l l l l 7200i i'320001 5200o g 32000~ OE-02 O.OE+OO 1181 i 12000 27 170 53 160 7'314'3 105138 Fr e quen cy/ cpm Fig The influence of span on the spectrum cascade -422- 2.2 Influence of Width on Stability Vibr ati on Spe ctr1Jm Cas cade In this computational model only the width of bearing is changed The typical relative curses consisting of the width and the first critical speed at different stations are shown in Fig C1 and C5 decrease with augment of width, but C9 increases in some sort Th I nf l tL