Unsteady flow in the volute of a centrifugal pump with large blade exit angle

doi:10.1615/InterJFluidMechRes.v35.i3.60

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	Unsteady flow in the volute of a centrifugal pump with large blade exit angle
	Li, Wen-Guang
刊名	International Journal of Fluid Mechanics Research
	2008
卷号	35 期号:3 页码:287-298
关键词	Centrifugal pumps Flow measurement Impellers Unsteady flow Angular moments Angular positions Axi-symmetrical Fluid velocities Impeller outlet Measurement points Periodical fluctuations Rectangular section
ISSN号	10642277
DOI	10.1615/InterJFluidMechRes.v35.i3.60
英文摘要	The unsteady flows in three sections of the volute with rectangular section were mapped by using LDV at both best efficiency and part-loading points respectively while pumping water. The pump is a single-stage, cantilevered centrifugal pump, its impeller is in a closed configuration and the blade outlet angle is 44. The results show that the fluid velocity fluctuates periodically with the impeller angular positions with respect to a measurement point where the flow was investigated. As increase in the distance from impeller outlet, the velocity damps rapidly and its periodical fluctuation is suppressed. The magnitude of the fluctuation is about 0.2-0.7 of the averaged velocity and decreases with the increase in the distance. The fluctuation magnitude in the flow angle seems larger than that in velocity by 1 - 2 order. The more the measurement point closes to the tongue of volute, the larger the fluctuation in both velocity and flow angle becomes. The averaged velocity declines with increase in the distance from the impeller outlet. However, the averaged flow angle rises at first, then decreases. The liquid angular moment is not conservational and the flow is not axisymmetrical as well in the volute.
WOS研究方向	Mechanics
语种	英语
出版者	Begell House Inc.
WOS记录号	WOS:000420446400006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/111791]
专题	兰州理工大学
作者单位	Lanzhou University of Technology, Department of Fluid Machinery, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Li, Wen-Guang. Unsteady flow in the volute of a centrifugal pump with large blade exit angle[J]. International Journal of Fluid Mechanics Research,2008,35(3):287-298.
APA	Li, Wen-Guang.(2008).Unsteady flow in the volute of a centrifugal pump with large blade exit angle.International Journal of Fluid Mechanics Research,35(3),287-298.
MLA	Li, Wen-Guang."Unsteady flow in the volute of a centrifugal pump with large blade exit angle".International Journal of Fluid Mechanics Research 35.3(2008):287-298.