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遠心羽根車入口循環流によるインデューサ失速の抑制 : 第2報, 失速抑制効果の数値解析

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Title: 遠心羽根車入口循環流によるインデューサ失速の抑制 : 第2報, 失速抑制効果の数値解析
Other Titles: Suppression of Inducer Stall Based on Inlet Recirculation in a Centrifugal Impeller : 2st Report, Numerical Analysis of Stall Suppression Effect
Authors: 孫, 自祥 / 石田, 正弘 / 坂口, 大作 / 植木, 弘信
Authors (alternative): Sun, Zixiang / Ishida, Masahiro / Sakaguchi, Daisaku / Ueki, Hironobu
Issue Date: 25-Jul-2000
Publisher: 日本機械学会
Citation: 日本機械学會論文集. B編 66(647) p.1712-1718, 2000
Abstract: The ring groove arrangement was proposed to improve surge margin in a centrifugal blower. The inlet recirculation formed by the arrangement at small flow rates resulted in a significant decrease in the flow rate of the unstable flow inception at a small expense of the delivery pressure drop. The effect of inlet recirculation on the main through-flow in the impeller and the unstable flow suppression is analyzed by the 3-D turbulent flow calculation, and the calculated results are compared with the experimental ones. The critical flow incidence is about 7 degrees for the separation bubble formation at the blade-leading edge. In the tested impeller, the separation bubble on the blade suction surface extends alongthe blade leading edge from the blade root to a radial position of the root-mean-square radius at the stall limit flow rate. It is found that the surge suppression is mainly due to decrease in flow incidence at the blade-leading based on the inlet recirculation flow.
Keywords: Centrifugal Impeller / Inducer Stall / Separation Bubble / Inlet Recirculation / Numerical Analysis
URI: http://hdl.handle.net/10069/6753
ISSN: 03875016
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/6753

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