Cavitation flow simulation for a centrifugal pump at a low flow rate  

作　　者：TAN Lei ZHU BaoShan CAO ShuLiang WANG YuMing 

机构地区：[1]State Key Laboratory of Tribology, Tsinghua University [2]State Key Laboratory of Hydroscience and Engineering, Tsinghua University

出　　处：《Chinese Science Bulletin》2013年第8期949-952,共4页

基　　金：supported by the National Natural Science Foundation of China (51176088 and 51179090);the National Basic Research Program of China (2009CB724304);the Open Research Fund Program of State Key Laboratory of Hydroscience and Engineering (sklhse-2012-E-02)

摘　　要：A computational model on the basis of the combination of the full cavitation model and the modified re-normalization group (RNG) k-ε turbulence model are used to simulate the cavitating flow in a centrifugal pump at a low flow rate. A filter function is introduced for the RNG k-ε turbulence model in order to consider the compressibility in the cavitating flow. The calculated values of the net positive suction head available (H NPSHa ) agree well with the experimental measurements. The cavities in the impeller are obtained and their evolvement with H NPSHa are revealed.A computational model on the basis of the combination of the full cavitation model and the modified re-normalization group （RNG） k-ε turbulence model are used to simulate the cavitating flow in a centrifugal pump at a low flow rate. A filter function is introduced for the RNG k-ε turbulence model in order to consider the compressibility in the cavitating flow. The calculated values of the net positive suction head available （HNPsHa） agree well with the experimental measurements. The cavities in the impeller are obtained and their evolvement with HNPSHa are revealed.

关 键 词：流动模拟 离心式泵 空化模型 低流速 湍流模型 计算模型 功能介绍 实验测量 

分 类 号：TH311[机械工程—机械制造及自动化]