水力发电2017，Vol.43Issue(8)：84-87,4.
多工况下分流叶片离心泵非定常空化特性分析
Unsteady Cavitation Characteristics of Centrifugal Pump with Splitter Blades Operating in Multi-Conditions
摘要
Abstract
In order to further optimize flow passage of impeller and improve the cavitation performance of centrifugal pump,the numerical simulations of three dimensional unsteady turbulent flow in whole flow passage of a centrifugal pump with or without splitter blades are carried out to analyze the cavitation performance of pump under 0.4Q-1.0Q conditions respectively.The results show that:(a) in the case of full development of cavitation,the head of centrifugal pump without splitter blades is more sensitive to the reduction of NPSH;(b) after adding splitter blades,the head of centrifugal pump is improved,the low pressure area of impeller is reduced,the turbulent kinetic energy of impeller is decreased obviously and the anti cavitation performance of pump is obviously enhanced;(c) with the decrease of flow rate,the critical cavitation margin of pump is reduced,but the rate of serious cavitation in pump is gradually increased;and (d) when a serious cavitation occurs in centrifugal pump,the cavity will block the flow of impeller.关键词
离心泵/分流叶片/非定常/空化特性Key words
centrifugal pump/splitter blade/unsteady/cavitation characteristics分类
建筑与水利引用本文复制引用
张兴,廖姣,张文明..多工况下分流叶片离心泵非定常空化特性分析[J].水力发电,2017,43(8):84-87,4.基金项目
国家自然科学基金资助项目(51379179) （51379179）
流体及动力机械四川省科技创新研究团队(2011JTD0016) （2011JTD0016）
西华大学研究生创新基金项目(ycjj2016096) （ycjj2016096）
