Incipient rotating stall characteristics measured by semiconductor L2F and pressure transducer in vaneless diffusers of centrifugal blowers

Masahiro Ishida, Daisaku Sakaguchi, Hironobu Ueki

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

7 被引用数 (Scopus)

抄録

In order to clarify the transient behavior from the non-stall condition to the developed rotating stall in vaneless diffuser of a centrifugal blower, blade-to-blade variations of velocity and wall pressure were measured immediately upstream and downstream of the impeller exit as well as in the vaneless diffuser by means of the semiconductor laser 2-focus velocimeter and the pressure sensor respectively. The specified auto-correlation coefficient of large scale disturbances with the wavelength larger than twice of the blade spacing show that the intermittent stall occurs prior to the developed rotating stall. By analyzing the flow-fluctuationellipse and the correlation coefficient with respect to the radial and tangential components of velocity fluctuation, it is found that the intermittent stall as well as the developed rotating stall are triggered by the interaction between the reverse flow in the diffuser entry region and the jet-wake like flow discharged from the impeller.

本文言語英語
ホスト出版物のタイトルAircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery
出版社American Society of Mechanical Engineers (ASME)
ISBN(電子版)9780791878545, 9780791878545
DOI
出版ステータス出版済み - 2000
外部発表はい
イベントASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000 - Munich, ドイツ
継続期間: 5月 8 20005月 11 2000

出版物シリーズ

名前Proceedings of the ASME Turbo Expo
1

その他

その他ASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000
国/地域ドイツ
CityMunich
Period5/8/005/11/00

!!!All Science Journal Classification (ASJC) codes

  • 工学一般

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