Numerical assessment on improving multistage centrifugal impeller performance by changing inlet skew angle at impeller inlet

作     者：M.N.Labib Woo Ju-sik Choi Du-youl T.Utomo B.Fajar Chung Han-shik Jeong Hyo-min 

作者机构：Graduate School of Department of Mechanical and Precision EngineeringGyeongsang National UniversityTongyeong 650-160Korea Fluid and Thermal Engineering Co.Ltd.Kyungnam 621-843Korea Department of Mechanical EngineeringEngineering FacultyUniversity of DiponegoroSemarang 1269Indonesia Department of Mechanical and Precision EngineeringGyeongsang National UniversityThe Institute of Marine Industr yTongyeong 650-160Korea Department of Mechanical and Precision EngineeringGyeongsang National UniversityThe Institute of Marine Industr yTongyeong 650-160Kore 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2012年第19卷第4期

页      面：953-961页

核心收录：

学科分类：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] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Project(NRF-2010-013-D00007) supported by the National Research Foundation of Korea Work finacially supported by the 2010 Research Professor Fund of Gyeongsang National University,Korea 

主　　题：离心泵叶轮 倾斜角度 数值评估 多级 计算流体动力学 Stokes方程 入口 性能 

摘      要：Multistage centrifugal impellers with four different skew angles were investigated by using computational fluid *** purpose of this work is to investigate the influences of lean angle at the blade tip of the impeller *** variations of lean angles,that is,8°,10°,15° and 20°,were made at first stage *** Average Navier Stokes equation was used in simulation together with a shear?stress transport(SST) k-w turbulence model and mixing-plane approach,*** dimensional fluid flows were simplified using periodic model to reduce the computational cost and time required.A good performance was expected that the secondary flow can be effectively reduced in the flow passage of the impeller without excessive increase in manufacturing cost caused by the secondary *** results show that secondary flow affects the main flow intricately to form vortices or having non-uniform velocity in the flow passage,which in turn results in substantial fluid energy loss not only in the impeller but also in the guide vane downstream of *** numerical solutions were performed and allowed the optimum design and operating conditions to be obtained.