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遠心羽根車の羽根先端すきまに基づく二次流れ


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Title: 遠心羽根車の羽根先端すきまに基づく二次流れ
Other Titles: Secondary Flow due to the Tip Clearance at the Exit of Centrifugal Impellers
Authors: 石田, 正弘 / 植木, 弘信 / 江上, 弘孝 / 妹尾, 泰利
Authors (alternative): Ishida, Masahiro / Ueki, Hironobu / Egami, Hirotaka / Senoo, Yasutoshi
Issue Date: 25-Jan-1989
Publisher: 日本機械学会
Citation: 日本機械学會論文集. B編 55(509) p.165-170, 1989
Abstract: The velocity distribution is measured at the exit of two different types of unshrouded centrifugal impellers under four different tip clearance conditions each, one with twenty radial blades and inducers and the other with sixteen backward-leaning blades. The secondary flow induced by the tip leakage is similar in both impellers, and the underturning near the blade tip due to the stationary shroud is reduced significantly with the increase of tip clearance. The local change of angular momentum due to the tip clearance is related to the flow rate ratio of leakage-flow and through-flow, and an almost proportional relationship between them is found. Despite a similar secondary flow in both impellers, the input power is hardly changed in the radial blades impeller and is decreased in the backward-leaning blades impeller by the increase of tip clearance.
Keywords: Fluid Machine / Centrifugal Impeller / Tip Clearance / Leakage / Secondary Flow / Input power / Angular Momentum
URI: http://hdl.handle.net/10069/6732
ISSN: 03875016
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/6732

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