水利水电科技进展2011，Vol.31Issue(5)：23-26,94,5.DOI:10.3880/j.issn.1006-7647.2011.05.006
采用径向回流平衡孔的低比速离心泵压力脉动特性
Pressure fluctuation performance of low specific-speed centrifugal pump with radial reflux balance hole/
摘要
Abstract
By means of the k-ε model, numerical simulation of unsteady full flow fields of low specific-speed centrifugal pump with three different structures, that is, radial reflux balance hole, traditional axial reflux balance hole and no balance hole, was carried out. The time domain and frequency domain were analyzed. The results show that for the above three kinds of structures, the fluid at the inlet of the impeller, outlet and tongue of the volute exhibits cyclic fluctuation with the time, and the fluctuating frequency is mainly the passing frequency of the blade. Compared with that with the other two structures, the low specific-speed centrifugal pump with radial reflux balance hole will effectively improve the pressure fluctuation at the tongue of the volute.关键词
径向回流平衡孔/低比速离心泵/压力脉动/数值模拟/结构网格Key words
radial reflux balance hole/low specific-speed centrifugal pump/pressure fluctuation/numerical simulation/structured gird分类
机械制造引用本文复制引用
曹卫东,张晓娣,施卫东..采用径向回流平衡孔的低比速离心泵压力脉动特性[J].水利水电科技进展,2011,31(5):23-26,94,5.基金项目
国家自然科学基金(51079062) （51079062）
江苏高等学校优秀科技创新团队计划(苏教科[2009]10号) （苏教科[2009]10号）
