The role of tip leakage vortex breakdown in compressor rotor aerodynamics

Masato Furukawa, Masahlro Inoue, Kazuhlsa Saiki, Kazutoyo Yamada

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

11 被引用数 (Scopus)

抄録

The breakdown of tip leakage vortex has been investigated on a low-speed axial compressor rotor with moderate blade loading. Effects of the breakdown on the rotor aerodynamics are elucidated by Navier-Stokes flow simulations and visualization techniques for identifying the breakdown. The simulations show that the leakage vortex breakdown occurs inside the rotor at a lower flow rate than the peak pressure rise operating condition. The breakdown is characterized by the existence of the stagnation point followed by a bubble-like recirculation region. The onset of breakdown causes significant changes in the nature of the tip leakage vortex: large expansion of the vortex and disappearance of the streamwise vorticity concentrated in the vortex. The expansion has an extremely large blockage effect extending to the upstream of the leading edge. The disappearance of the concentrated vorticity results in no rolling-up of the vortex downstream of the rotor and the disappearance of the pressure trough on the casing. The leakage flow field downstream of the rotor is dominated by the outward radial flow resulting from the contraction of the bubble-like structure of the breakdown region. It is found that the leakage vortex breakdown plays a major role in characteristic of rotor performance at nearstall conditions. As the flow rate is decreased from the peak pressure rise operating condition, the breakdown region grows rapidly in the streamwise, spanwise and pitchwise directions. The growth of the breakdown causes the blockage and the loss to increase drastically. Then, the interaction of the breakdown region with the blade suction surface gives rise to the three-dimensional separation of the suction surface boundary layer, thus leading to a sudden drop in the total pressure rise across the rotor.

本文言語英語
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)9780791878620
DOI
出版ステータス出版済み - 1998
イベントASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1998 - Stockholm, スウェーデン
継続期間: 6 2 19986 5 1998

出版物シリーズ

名前Proceedings of the ASME Turbo Expo
1

その他

その他ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1998
Countryスウェーデン
CityStockholm
Period6/2/986/5/98

All Science Journal Classification (ASJC) codes

  • Engineering(all)

フィンガープリント 「The role of tip leakage vortex breakdown in compressor rotor aerodynamics」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル