Unsteady flow structure in an axial compressor at windmill condition

Takashi Goto, Dai Kato, Yutaka Ohta, Eisuke Outa

研究成果: Conference contribution

13 被引用数 (Scopus)

抄録

This study investigates experimentally and numerically unsteady flow fields in an axial compressor operating at highflow rate in order to understand the flow structure in the stator row operating at windmill condition. The experimental and numerical data are compared by time- And phase-lock-averaged techniques. Additionally, unsteady vortex structure is investigated by numerical technique. At windmill condition, the incidence angle to the stator row becomes extremely negative. Therefore, large separation occurs near pressure surface in the stator passage. The experimental and numerical results indicate that a large vortex is generated in the separation area. According to the numerical results, part of the vortex migrates downstream, and the vortex produces blockage of the main stream of the stator passage. Therefore, net flow area in the stator passage becomes small so that the flow between the vortex and suction side of stator vane is accelerated. As a result, the total pressure deterioration is generated in the stator passage because the high speed flow and the vortex cause high shear.

本文言語English
ホスト出版物のタイトルTurbomachinery
出版社American Society of Mechanical Engineers (ASME)
ISBN(電子版)9780791845639
DOI
出版ステータスPublished - 2014 1 1
イベントASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014 - Dusseldorf, Germany
継続期間: 2014 6 162014 6 20

出版物シリーズ

名前Proceedings of the ASME Turbo Expo
2D

Conference

ConferenceASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014
国/地域Germany
CityDusseldorf
Period14/6/1614/6/20

ASJC Scopus subject areas

  • 工学(全般)

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