Cavitation control of centrifugal pump based on gap jet principle

doi:10.3785/j.issn.1008-973X.2020.09.015

	Cavitation control of centrifugal pump based on gap jet principle
	Zhao, Wei-guo 1,2; Lu, Jia-jia 1,2; Zhao, Fu-rong 1,2
刊名	Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science)
	2020-09-01
卷号	54 期号:9 页码:1785-1794
关键词	Centrifugal pumps High pressure effects Impellers Numerical methods Turbulence models Calculation results Cavitation control Flow field structure High-pressure fluids K-Omega turbulence model Low specific speed centrifugal pump Numerical simulation method Suppression effects
ISSN号	1008973X
DOI	10.3785/j.issn.1008-973X.2020.09.015
英文摘要	A passive control method with slot on the blade was proposed, and the cavitation suppression effect and control mechanism of the structure were explored, in order to improve the cavitation flow state in low specific speed centrifugal pump. The restraining effect of the structure on cavitation was explored by numerical simulation method. The modified SST k-ω turbulence model and Kubota cavitation model were used to calculate the steady and unsteady flow on the original impeller and the modified impeller, respectively, to obtain the flow field structure and pressure pulsation characteristic of two impeller forms in each cavitation stage under the design conditions. The calculation results show that the high-pressure fluid flowing to the back of the blade through the gap in the modified impeller increases the pressure on the back of the blade, which has inhibitory effect on initial cavitation, the development of cavitation and the intense stage of cavitation. Especially for the intense stage of cavitation, the cavity volume fraction decreased by 60.6% compared with the original model. the main frequency amplitude of the pressure pulsation in the liquid region of the modified impeller decreased at each cavitation stage, compared with that of the original impeller. Copyright ©2020 Journal of Zhejiang University (Engineering Science). All rights reserved.
语种	中文
出版者	Zhejiang University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115322]
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 System, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhao, Wei-guo,Lu, Jia-jia,Zhao, Fu-rong. Cavitation control of centrifugal pump based on gap jet principle[J]. Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science),2020,54(9):1785-1794.
APA	Zhao, Wei-guo,Lu, Jia-jia,&Zhao, Fu-rong.(2020).Cavitation control of centrifugal pump based on gap jet principle.Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science),54(9),1785-1794.
MLA	Zhao, Wei-guo,et al."Cavitation control of centrifugal pump based on gap jet principle".Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) 54.9(2020):1785-1794.