华中科技大学学报（自然科学版）2013，Vol.41Issue(3)：92-96,5.
多级离心泵叶轮与导叶水力性能优化研究
Hydraulic performance optimization study on impeller and diffuser of multi-stage centrifugal pump
摘要
Abstract
In order to improve efficiency of multistage centrifugal pump, hydraulic performance of different combination of impeller and radial diffuser under different operating conditions was studied by software FLUENT. It is found that the impeller has higher efficiency with higher blade distort degree at inlet end; the pump will decline on its head and efficiency with the decline of gap between impeller and diffuser; the best combination of impeller and diffuser may change with the change of flow and will not change with the change of speed. The internal flow field analysis shows that eddy current in impeller and radial diffuser is the main factor to reduce the hydraulic efficiency of pump. It is proposed that appropriate increase of blade distort degree at inlet end and reduction of clearance between impeller and diffuser, thereby to weaken the internal vortex, is one of the directions of hydraulic performance optimization of multi-stage centrifugal pump. Test of multi-stage pump performance shows that the error between simulation results and the experimental results is less than 10%.关键词
多级离心泵/叶轮/径向导叶/数值模拟/扭曲度Key words
multi-stage centrifugal pump/impeller/radial diffuser/numerical simulation/distort degree分类
机械制造引用本文复制引用
汪家琼,孔繁余..多级离心泵叶轮与导叶水力性能优化研究[J].华中科技大学学报（自然科学版）,2013,41(3):92-96,5.基金项目
国家科技支撑计划资助项目(2011BAF14B03) （2011BAF14B03）
国家自然科学基金资助项目(51209106) （51209106）
江苏高校优势学科建设工程资助项目(PAPD). （PAPD）
