流体机械2017，Vol.45Issue(8)：43-47,5.DOI:10.3969/j.issn.1005-0329.2017.08.010
螺旋离心泵内不稳定漩涡空化对出口压力的影响
Influence of Unsteady Vortex Cavitation on Pump Outlet Pressure in A Screw Centrifugal Pump
邓育轩 1纪燕飞 2何立东 1王灵德2
作者信息
- 1. 天华化工机械及自动化研究设计院有限公司,甘肃兰州730050
- 2. 北京化工大学,北京100029
- 折叠
摘要
Abstract
In order to study the influence of unsteady vortex cavitation on outlet pressure in hydraulic machinery,a numerical analysis of unsteady vortex cavitation in screw centrifugal pump was presented using the computer fluid dynamic software CFD.It is found that under a certain operation condition,the pressure at the core of vortex formed by tip leakage secondary flow is lower than the ambient pressure due to the centrifugal force on the vertical flow which results in vortex cavitation if the core pressure becomes lower than the vapor pressure in screw centrifugal pump.The process of inception,development and collapse of vortex cavitation were obtained by the results as well.It is found that as the vortex cavitation occurs,the outlet pressure reduces considerably,and the outlet pressure fluctuates irregularly.关键词
螺旋离心泵/漩涡空化/计算流体力学/数值模拟Key words
screw centrifugal pump/vortex cavitation/CFD/numerical simulation分类
机械制造引用本文复制引用
邓育轩,纪燕飞,何立东,王灵德..螺旋离心泵内不稳定漩涡空化对出口压力的影响[J].流体机械,2017,45(8):43-47,5.
