An active method to control cavitation in a centrifugal pump by obstacles

doi:10.1177/1687814017732940

	An active method to control cavitation in a centrifugal pump by obstacles
	Zhao, Weiguo 1,2; Zhao, Guoshou 1,2
刊名	ADVANCES IN MECHANICAL ENGINEERING
	2017-11-19
卷号	9 期号:11
关键词	Cavitation control obstacles centrifugal pump transient flow
ISSN号	1687-8140
DOI	10.1177/1687814017732940
英文摘要	In this article, we proposed an active method of obstacle attached on the blade to control cavitation in centrifugal pump. The modified shear stress transport k-omega model with a local density correction for turbulent eddy viscosity combined with Kubota cavitation model was employed to simulate three-dimensional unsteady flow. The simulated external performance agreed fairly well with experiment observation. The results show that the obstacles of appropriate height can cause little disturbance to external performance. The over-high obstacle can cause larger perturbation to deteriorate the flow field at large flow rate point. The obstacle of appropriate height can induce relative high pressure and optimize the flow structure to suppress the cavitation, which is the main mechanism of cavitation control in a centrifugal pump. The passages would be blocked if over-high obstacle is arranged, which is bad to suppress the cavitation in centrifugal pumps. The effects of 1/2 the outlet width of impeller for cavitation suppression are optimal when the bubbles reach close to the obstacle, which degrade the amplitude of dominate frequency and simultaneously attenuate the bubble volume. When cavitation completely developed, the obstacle of any height can keep the cavity volume attenuating and 1/2 of the outlet width of impeller is best.
资助项目	National Natural Science Foundation of China[51269011] ; Open Research Subject of Key Laboratory of Fluid and Power Machinery (Xihua University), Ministry of Education[szjj2017-093]
WOS研究方向	Thermodynamics ; Engineering
语种	英语
出版者	SAGE PUBLICATIONS LTD
WOS记录号	WOS:000415947300001
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33019]
专题	能源与动力工程学院
通讯作者	Zhao, Weiguo
作者单位	1.Key Lab Fluid Machinery & Syst, Lanzhou, Gansu, Peoples R China 2.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Weiguo,Zhao, Guoshou. An active method to control cavitation in a centrifugal pump by obstacles[J]. ADVANCES IN MECHANICAL ENGINEERING,2017,9(11).
APA	Zhao, Weiguo,&Zhao, Guoshou.(2017).An active method to control cavitation in a centrifugal pump by obstacles.ADVANCES IN MECHANICAL ENGINEERING,9(11).
MLA	Zhao, Weiguo,et al."An active method to control cavitation in a centrifugal pump by obstacles".ADVANCES IN MECHANICAL ENGINEERING 9.11(2017).