An optimization method on runner blades in bulb turbine based on CFD analysis

作     者：YANG Wei WU YuLin LIU ShuHong 

作者机构：Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China State Key Laboratory of Hydroscience and Engineering Department of Thermal Engineering Tsinghua University Beijing 100084 China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2011年第54卷第2期

页      面：338-344页

核心收录：

学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 080703[工学-动力机械及工程] 080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 083204[工学-水产品加工及贮藏工程] 

基　　金：supported by the Tianjin Technical Innovative Project Tianjin Tianfa Heavy Machinery Company Ltd.and Harbin Institute of Large Electric Machinery 

主　　题：bulb turbine CFD flow diagnose performance prediction SST k-ω turbulence model B-spline curve 

摘      要：In this paper an optimization method of the runner blades in a bulb turbine based on CFD analysis is *** the method the main scales of the turbine including guide vane,runner and draft are *** the runner blades are modified based on the present *** the optimization method the runner blade is expressed by spline surface with a gather of coordinate *** B-spline curve is used to keep the modified blades *** order to make the blade optimization simple and ef- ficient,one of the coordinates is fixed and only the angles of the points are changed according to different modification *** main optimization principles based on flow diagnosis are presented *** three principles are all based on the CFD analysis of the internal flow in bulb *** the purpose of method verification,the optimization method is used in a model bulb turbine.A three dimensional steady turbulent computation is carried out through the whole passage including the bulb body,guide vanes,runner and draft tube of the bulb turbine under seven different work *** SST k-ωturbulence model is used during the CFD analysis and the performance of the turbine can be *** runner blade is optimized according to the three optimization principles based on flow *** CFD analysis is conducted again on the optimized turbine and another modification is needed if the new turbine can’t satisfy the required *** of the computational results between the original turbine and an optimized one indicates that the optimization method is practical and does improve the performance of the bulb turbine.