Effect of hub-fitted tiny blade in centrifugal pump on cavitation suppression

doi:10.11990/jheu.201905025

	Effect of hub-fitted tiny blade in centrifugal pump on cavitation suppression
	Zhao, Weiguo 1,2; Yu, Jinhong 1,2; Xu, Yang 3; Xu, Zexin 1,2; Wang, Guipeng 1,2
刊名	Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University
	2020-12-05
卷号	41 期号:12 页码:1827-1833
关键词	Centrifugal pumps Impellers Kinetic energy Kinetics Vortex flow Cavitation performance Development stages Experimental values External characteristic Low specific speed centrifugal pump Numerical calculation Suppression mechanism Turbulent kinetic energy
ISSN号	10067043
DOI	10.11990/jheu.201905025
英文摘要	To solve the problem that cavitation is prone to occur in low-specific-speed centrifugal pumps, a new method in which tiny blades are arranged on the hub of the impeller is proposed to suppress cavitation. Through numerical calculations, combined with corresponding external characteristics tests and cavitation experiments, the effect of tiny blades on the cavitation performance of low-specific-speed centrifugal pumps was investigated, and the cavitation suppression mechanism was also analyzed. The results show that the simulation value of cavitation agrees well with the experimental value. In the cavitation development stage, the tiny blade optimizes the flow structure, decreases the intensity of turbulent kinetic energy in the impeller, and significantly weakens the vortex intensity on the hub of the blade, thereby improving the cavitation performance of the centrifugal pump. The cavity volume with the tiny blades is far smaller than that of the prototype impeller. At the same time, the tiny blades can reduce the main frequency amplitude of the pressure in the impeller, but will cause a certain degree of disturbance to the volute tongue. The above analysis provides a certain research foundation and theoretical basis for suppressing the development of cavitation in centrifugal pumps. Copyright ©2020 Journal of Harbin Engineering University.
语种	中文
出版者	Editorial Board of Journal of Harbin Engineering
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151111]
专题	能源与动力工程学院
作者单位	1.College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou; 730050, China; 3.Shanghai Kaiquan Pump Industry(Group) Company, Ltd., Shanghai; 201804, China
推荐引用方式 GB/T 7714	Zhao, Weiguo,Yu, Jinhong,Xu, Yang,et al. Effect of hub-fitted tiny blade in centrifugal pump on cavitation suppression[J]. Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University,2020,41(12):1827-1833.
APA	Zhao, Weiguo,Yu, Jinhong,Xu, Yang,Xu, Zexin,&Wang, Guipeng.(2020).Effect of hub-fitted tiny blade in centrifugal pump on cavitation suppression.Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University,41(12),1827-1833.
MLA	Zhao, Weiguo,et al."Effect of hub-fitted tiny blade in centrifugal pump on cavitation suppression".Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University 41.12(2020):1827-1833.