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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 30, No. 54 >


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Title: 遠心送風機の旋回失速初生に及ぼすディフューザ入口速度分布の影響
Other Titles: Effect of Diffuser Inlet Velocity Distribution on Rotating Stall Inception of a Centrifugal Blower
Authors: 坂口, 大作 / 石田, 正弘 / 植木, 弘信 / 孫, 自祥
Authors (alternative): Sakaguchi, Daisaku / Ishida, Masahiko / Ueki, Hironobu / Sun, Zixiang
Issue Date: Jan-2000
Citation: 長崎大学工学部研究報告 Vol.30(54) p.23-28, 2000
Abstract: The effect of diffuser inlet velocity distribution on unstable flow inception was examined experimentally in the vaneless diffuser of a centrifugal blower with the backswept blade impeller. In order to suppress the reverse flow appeared firstly on the hub side wall at small flow rates, the velocity was increased locally near the hub side of the diffuser inlet. As a result, the flow rate of rotating stall inception was decreased and the stall margin was improved. It is found that the rotating stall in the vaneless diffuser is mainly caused by the 3-D boundary layer separation on the hub side wall not on the shroud wall.
URI: http://hdl.handle.net/10069/5094
ISSN: 02860902
Type: Departmental Bulletin Paper
Appears in Collections:Volume 30, No. 54

Citable URI : http://hdl.handle.net/10069/5094

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