水资源与水工程学报2011，Vol.22Issue(2)：123-125,131,4.
离心泵变频调速空化特性数值分析
Numerical analysis on characteristics of cavitation in variable frequency regulation of centrifugal pump
孟凡英 1孙冠男 1郭祥华1
作者信息
- 1. 辽宁工程技术大学机械工程学院,辽宁阜新123000
- 折叠
摘要
Abstract
Aimed at a certain type of horizontal single-stage single-suction centrifugal pump, a 3 dimensions mathematical model was constructed.By using the computational fluid dynamics theory and moving reference frame model and two-phase mixture model to simulate the internal state of the pump, the change rule of the interior pressure, vapor-liquid two-phase and vapor-phase volume fraction with the output frequency and the velocity of pump were obtained.The calculation results show that the inlet pressure has the inverse ratio with output frequency of motor and rotation speed, when it is less than vaporization pressure, cavitation is inevitably produced; the relation between volume fraction of vapor-phase and rotary speed is direct ratio.The incidence of cavitation is bigger and more serious with RPM increases.The results can provided a theoretical basis for the better and more rational application of the variable frequency regulation to pump.关键词
离心泵/变频调节/空化/数值分析Key words
centrifugal pump/ variable frequency regulation/ cavitation/ numerical analysis分类
机械制造引用本文复制引用
孟凡英,孙冠男,郭祥华..离心泵变频调速空化特性数值分析[J].水资源与水工程学报,2011,22(2):123-125,131,4.
