Abstract：Two shapes of complex impeller of roto jet pump were designed. CFD numerical simulation was performed in order to investigate the interior flow of the impellers,and obtain the distribution of pressure and relative velocity in the impeller passages. Suitable short blades installation can decrease the degree of diffusion, and the effect of split flow and diversion is very well. At last, through comparing the performance curves of the two model pumps,the performance was found to meet the designing requirement by using S shaped complex blades. When using two short blades, vortex appeared in the impeller passage, and backflow also appeared near one of the blades, which lead to hydraulic loss and lower efficiency. The performance of pump with one short blade is more superior.
[1]Osbom S. The roto jet pump: 25 years new[J]. World Pumps,1996(363):32-36.[2]袁寿其,张金凤,袁建平.正交试验研究分流叶片主要参数对性能影响[J].排灌机械,2008,26(2):1-5.Yuan Shouqi, Zhang Jinfeng, Yuan Jianping. Orthogonal experimental study effect of main geometry factors of splitter blades on pump performance[J]. Drainage and Irrigation Machinery,2008,26(2):1-5.(in Chinese)[3]齐学义,杨军虎,刘在伦.旋喷泵设计参数的分析探讨[J]. 流体机械,1999,27(10):19-21.Qi Xueyi, Yang Junhu, Liu Zailun. Analyzing and designed parameter for roto jet pump[J]. Fluid Machinery, 1999, 27(10): 19-21. (in Chinese)[4]齐学义,李德忠,杨军虎. 旋转喷射泵叶轮的设计方法探讨[J]. 水泵技术,1999(6):12-15.Qi Xueyi, Li Dezhong, Yang Junhu. Study on the method of impeller of roto jet pump[J]. Pump Technology,1999(6):12-15.(in Chinese)[5]Yuan Shouqi, Jin Shude, He Wei. Performance characteristics and viscous flow analysis of centrifugal pumps[J]. Chinese Journal of Mechanical Engineering: English Edition, 1995,8(1): 75-81. [6]常洪军,朱熠.液体射流泵内部三维流场的数值模拟[J]. 排灌机械,2005,23(6):13-15.Chang Hongjun, Zhu Yi. Three dimensional numerical simulation on interior flow field for liquid jet pump[J]. Drainage and Irrigation Machinery,2005,23(6):13-15.(in Chinese)[7]王春林,司艳雷,郑海霞,等. 旋流自吸泵内部流场的数值模拟[J]. 排灌机械,2008,26(2):31-35.Wang Chunlin,Si Yanlei,Zheng Haixia,et al. Numerical simulation of rotational interior flow in self priming pump[J]. Drainage and Irrigation Machinery, 2008,26(2):31-35.(in Chinese)[8]田爱民,许洪元.旋转喷射泵集流管内部流动计算[J]. 石油化工设备,2005,34(2):21-25.Tian Aimin, Xu Hongyuan. Turblent flow calculation for collecting tube in roto jet pump [J]. Peiro Chemical Equipment,2005,34(2):21-25.(in Chinese)[9]李德忠,杨虎军,刘彦,等.旋转喷射泵主要过流部件设计研究[J].流体机械,2005,33(9):9-13.Li Dezhong,Yang Hujun,Liu Yan,et al. Design study on key parts to roto jet pump[J]. Fluid Machinery,2005,33(9):9-13.(in Chinese)[10]杨军虎,张红霞,张光一,等.旋转喷射泵转子腔内液体的流动规律[J].兰州理工大学学报,2009,35(2):55-57.Yang Junhu, Zhang Hongxia, Zhang Guangyi, et al. Fluid flow pattern in rotor cavity of roto jet pumps[J]. Journal of Lanzhou University of Technology, 2009, 35(2): 55-57. (in Chinese)
