水利水电科技进展2011，Vol.31Issue(6)：31-34,4.DOI:10.3880/j.issn.1006-7647.2011.06.009
低比转速离心泵空化性能的数值模拟
Numerical simulation of cavitation characteristics of low specific speed centrifugal punmp
摘要
Abstract
In order to analyze the vapor-liquid two-phase flows in low specific speed centrifugal pumps at the occurrence of cavitation, numerical simulation of the vapor-liquid two-phase flow fields in a centrifugal pump at a specific speed of 66 was carried out by use of computational fluid dynamics software. Hie distribution of water vapor within the impeller at different net positive suction heads was investigated. Cavitation inception occurred at the inlet of blade suction side was found when the inlet pressure is quite high. Under the critical and the allowable net positive suction heads, water vapor was found on the blade surface and in the flow channel, occupied part of the impeller flow channel. The energy transfer within impeller was affected and cavitation erosion may happen. The accuracy of numerical simulation was validated through the experimental studies on the prototype pump.关键词
离心泵/空化初生/临界空化余量/允许空化余量Key words
centrifugal pump/ cavitation inception/ critical net positive suction head/ allowable net positive suction head分类
机械制造引用本文复制引用
典平鸽..低比转速离心泵空化性能的数值模拟[J].水利水电科技进展,2011,31(6):31-34,4.基金项目
"十一五"国家科技支撑计划(2008BAF34B10) （2008BAF34B10）
