Short and long length-scale disturbances leading to rotating stall in an axial compressor stage with different stator/rotor gaps

M. Inoue, M. Kuroumaru, S. Yoshida, Masato Furukawa

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

The transient processes of rotating stall evolution have been investigated experimentally in a low-speed axial compressor stage with three stator-rotor gaps. The pressure traces at 8 circumferential locations on the casing wall near the rotor leading edge have been analyzed by the wavelet transforms. With the appropriate mother wavelets, the evolution of short and long length-scale disturbances leading to the stall can be captured clearly. Behavior of these disturbances is different depending on the stator- rotor gap. For the large and middle gap, the stall inception is detected by a spiky short length-scale disturbance, and the number of spiky waves increases to generate the high frequency waves. They becomes the short length-scale part-span stall cells at the mild stall for the large gap, while they turn into a big stall cell with growth of a long length-scale disturbance for the middle gap. In the latter case, therefore, the stalling process was identified with 'high frequency stall inception'. For the small stator-rotor gap, the stalling process is identified with 'long wave-length stall inception', and supported the recent computational model for the short wave-length stall inception by showing that closing the rotor-stator gaps suppressed the growth of short length-scale disturbances. From the measurement of the pressure field traces on the casing wall, a hypothesis has been built up that the short length-scale disturbance should result from a separation vortex from a blade surface to reduce circulation. The processes of the stall evolution are discussed on this hypothesis.

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(印刷版)9780791878507
DOI
出版ステータス出版済み - 1月 1 2001
イベントASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001 - New Orleans, LA, 米国
継続期間: 6月 4 20016月 7 2001

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 2001: Power for Land, Sea, and Air, GT 2001
国/地域米国
CityNew Orleans, LA
Period6/4/016/7/01

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)

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