摘要
Analysis on the inner flow field of a centrifugal pump impeller with splitter blades is carfled out by numerical simulation. Based on this analysis, the principle of increasing pump head and efficiency are discussed. New results are obtained from the analysis of turbulence kinetic energy and relative velocity distribution： Firstly, unreasonable length or deviation design of the splitter blades may cause great turbulent fluctuation in impeller channel, which has a great effect on the stability of impeller outlet flow; Secondly, it is found that the occurrence of flow separation can be decreased or delayed with splitter blades from the analysis of blade loading; Thirdly, the effect of splitter blades on reforming the structure of ＂jet-wake＂ is explained from the relative velocity distribution at different flow cross-sections, which shows the flow process in the impeller. The inner flow analysis verifies the results of performance tests results and the PIV test.
Analysis on the inner flow field of a centrifugal pump impeller with splitter blades is carfled out by numerical simulation. Based on this analysis, the principle of increasing pump head and efficiency are discussed. New results are obtained from the analysis of turbulence kinetic energy and relative velocity distribution： Firstly, unreasonable length or deviation design of the splitter blades may cause great turbulent fluctuation in impeller channel, which has a great effect on the stability of impeller outlet flow; Secondly, it is found that the occurrence of flow separation can be decreased or delayed with splitter blades from the analysis of blade loading; Thirdly, the effect of splitter blades on reforming the structure of ＂jet-wake＂ is explained from the relative velocity distribution at different flow cross-sections, which shows the flow process in the impeller. The inner flow analysis verifies the results of performance tests results and the PIV test.
基金
This project is supported by Foundation of National College Doctoral Prog-ram of China(No.20050299006).
作者简介
YUAN Shouqi, male, born in 1963, is currently a professor in Research Centre of Fluid Machinery Engineering and Technology, Jiangsu University, China. He has received 16 prizes of science and technology advancement at province or ministry level. He has published 3 books and more than 170 papers. His research interests include the theory, design and CFD of pumps and fluid machinery. Tel： ＋86-511-8780007; E-mail： shouqiy@ujs.edu.cnZHANG Jinfeng, female, born in 1981, is currently a PhD candidate in Jiangsu University, China. She has published 4 papers. Her research interests include the theory, design and CFD of pumps and fluid machinery. Tel： ＋86-511-8783747; E-mail： sparrowzjf@126.comYUAN Jianping, male, bom in 1970, is currently an associate professor and a PhD candidate in Research Center of Fluid Machinery Engineering and Tech- nology, Jiangsu University, China. He has received 6 prizes of science and technology advancement at province or ministry level. He has published more than 40 papers. His research interests include theory, design, and numerical simulation of fluid machinery. Tel： ＋86-511-8780280; E-mail： yh@ujs.edu.cnHE Youshi, male, bom in 1962, is currently a professor in Jiangsu University, China. He has received 4 prizes of science and technology advancement at province level. He has published more than 30 papers. His research interests include the theory, design and CFD of pumps and fluid machinery. Tel： ＋86-511-8780186; E-mail： heyshi@ujs.edu.cnFU Yuedeng, male, born in 1982, is currently a postgraduate in Jiangsu University, China. His research interests include numerical simulation and inner flow testing of pumps. Tel： ＋86-511-8780280; E-mail： fuyuedeng@163.com
