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Experimental study of the effect of blade tip clearance and blade angle error on the performance of mixed-flow pump

Content Provider	Springer Nature Link
Author	Bing, Hao Cao, ShuLiang He, ChengLian Lu, Li
Copyright Year	2012
Abstract	The hydraulic performance test of the mixed-flow pump has been carried out through selecting different blade tip clearances and various blade angle errors. The ratio of the mixed-flow pump efficiency reduction and the blade tip clearance variation (Δη/Δδ) varies with the flow rate coefficient ϕ revealing a parabolic trend. An empirical equation has been developed for the mixed-flow pump model by parabolic fitting. For the same blade tip clearance variation Δδ, the mixed-flow pump efficiency reduction Δη increases rapidly as the flow rate rises. For any given flow rate, the efficiency, the head and the shaft power of the mixed-flow pump all decrease with the increase of the blade tip clearance. Among them, the efficiency reduction Δη varies approximately linearly with the blade tip clearance variation Δδ. When the angle of an individual blade of the mixed-flow pump has a deviation, the performance curves will move and change. These curves have consistent change directions with the performance curves under the condition of all the blades rotated at the same time, but have smaller offset and lower range of variation. When an individual blade angle error changes to ±2°, the optimal efficiency of the mixed-flow pump will have no significant difference. When the individual blade angle error increases to ±4°, the optimal efficiency will decrease by 1%.
Starting Page	293
Ending Page	298
Page Count	6
File Format	PDF
ISSN	16747321
Journal	Science in China Series E: Technological Sciences
Volume Number	56
Issue Number	2
e-ISSN	18691900
Language	English
Publisher	SP Science China Press
Publisher Date	2012-12-01
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	mixed-flow pump model test hydraulic performance blade tip clearance blade angle Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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