水力发电2018，Vol.44Issue(6)：71-74,115,5.
高速离心泵多维空化特性研究
Research on Multidimensional Cavitation Characteristics of High-speed Centrifugal Pumps
摘要
Abstract
In order to investigate the influences of the evolution of internal cavitation on the stability of high-speed centrifugal pump,the internal cavitation flow of high-speed centrifugal pump and the pressure pulsation of multi-dimensional space monitoring point under unsteady flow are simulated.The proportion of vacuole volume fraction on blade space is studied.The influences of three-dimensional cavitation which is developed from weak to strong in impeller flow channel on the pressure pulsations at tongue and impeller outlet are also studied.The results show that:(a) the volume fraction of vacuole on each blade is increased with the decreases of cavitation coefficient and flow coefficient;and (b) when the cavitation degree is relatively smaller,the change rate of pressure pulsation at tongue and impeller outlet is relatively gentle,but in more severe case,the pressure pulsations at tongue and impeller outlet are greatly affected and the critical point of cavitation coefficient is σ =0.086.关键词
高速离心泵/空泡体积/空化/压力脉动Key words
high-speed centrifugal pump/cavitation volume/cavitation/pressure pulsation分类
机械制造引用本文复制引用
罗旭,宋文武,虞佳颖,万伦,陈建旭..高速离心泵多维空化特性研究[J].水力发电,2018,44(6):71-74,115,5.基金项目
四川省科技厅项目(2016JY0187) （2016JY0187）
四川省教育厅重大培育项目(14CZ0013) （14CZ0013）
