Unsteady flow behavior due to breakdown of tip leakage vortex in an axial compressor rotor at near-stall condition

Masato Furukawa, Kazuhisa Saiki, Kazutoyo Yamada, Masahiro Inoue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

49 Citations (Scopus)

Abstract

The unsteady flow nature caused by the breakdown of the tip leakage vortex in an axial compressor rotor at near-stall conditions has been investigated by unsteady three-dimensional Navier-Stokes flow simulations. The simulations show that the spiral-type breakdown of the tip leakage vortex occurs inside the rotor passage at the near-stall conditions. Downstream of the breakdown onset, the tip leakage vortex twists and turns violently with time, thus interacting with the pressure surface of the adjacent blade. The motion of the vortex and its interaction with the pressure surface are cyclic. The vortex breakdown causes significant changes in the nature of the tip leakage vortex, which result in the anomalous phenomena in the time-averaged flow fields near the tip at the near-stall conditions: no rolling-up of the leakage vortex downstream of the rotor, disappearance of the casing wall pressure trough corresponding to the leakage vortex, large spread of the low-energy fluid accumulating on the pressure side, and large pressure fluctuation on the pressure side. As the flow rate is decreased, the movement of the tip leakage vortex due to its breakdown becomes so large that the leakage vortex interacts with the suction surface as well as the pressure one. The interaction with the suction surface gives rise to the three-dimensional separation of the suction surface boundary layer.

Original languageEnglish
Title of host publicationAircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791878545, 9780791878545
DOIs
Publication statusPublished - Jan 1 2000
EventASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000 - Munich, Germany
Duration: May 8 2000May 11 2000

Publication series

NameProceedings of the ASME Turbo Expo
Volume1

Other

OtherASME Turbo Expo 2000: Power for Land, Sea, and Air, GT 2000
CountryGermany
CityMunich
Period5/8/005/11/00

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Furukawa, M., Saiki, K., Yamada, K., & Inoue, M. (2000). Unsteady flow behavior due to breakdown of tip leakage vortex in an axial compressor rotor at near-stall condition. In Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery (Proceedings of the ASME Turbo Expo; Vol. 1). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/2000-GT-0666