原子能科学技术2016，Vol.50Issue(7)：1216-1223,8.DOI:10.7538/yzk.2016.50.07.1216
基于非线性空化的离心泵内部流动特性分析
Analysis of Internal Flow Characteristics of Centrifugal Pump Based on Nonlinear Cavitation
摘要
Abstract
For studying transient unstable flow variation in centrifugal pump impeller with cavitation,steady and transient calculations with cavitation taking place in centrif-ugal pump impeller were carried out by using ANSYS-CFX software.The transient nonlinear flow in flow channel was analyzed by applying the calculation results of the velocity field,the pressure field,the gas volume fraction and the pressure fluctuation of the different flow channels in the pump.The research results show that influenced by rotor-stator interference,volute throat area and other factors,the cavitation developing in each channel of centrifugal pump impeller is nonlinear.With the development of cavitation,the distributions of pressure field,velocity field and gas volumetric fraction of the impeller interior are asymmetrical.The main reason leading to this kind of nonlin-ear cavitation phenomenon is the asymmetry of the spiral case structure and the non-synchronous of the cavitation process in the flow channel region from the middle surface in the flow channel to the back of the blade.In case of no significant cavitation,pulsa-ting flow of different flow channels depicts the same regularity,but the main frequency of the pressure fluctuation is chaotic and the regularity is weakened under the condition of severe cavitation.关键词
离心泵/非线性空化/气液两相/压力脉动/动静干涉Key words
centrifugal pump/nonlinear cavitation/gas-liquid two-phase/pressure pul-sation/rotor-stator interference分类
机械制造引用本文复制引用
朱荣生,卢永刚,王秀礼,付强,陈宗良..基于非线性空化的离心泵内部流动特性分析[J].原子能科学技术,2016,50(7):1216-1223,8.基金项目
国家自然科学基金资助项目(51379091) （51379091）
国家杰出青年科学基金资助项目(51509112) （51509112）
江苏省自然科学基金科技项目资助(BK20130516) （BK20130516）
