LES study of feedback-loop mechanism of supersonic open cavity flows

Weipeng Li, Taku Nonomura, Akira Oyama, Kozo Fujii

研究成果: Conference contribution

10 被引用数 (Scopus)

抄録

Supersonic flow over a three-dimensional rectangular cavity with length-to-depth ratio of 2 is numerically studied by implicit large-eddy simulation to clarify the feedback-loop mechanism. A feedback-loop cycle is described and visualized with phase-averaged analysis of simulation results. Causality between the feedback acoustic wave and leading-edge shedding vortex is clearly demonstrated. Mach wave reflection at trailing edge is turned out to be the generation mechanism of feedback acoustic wave. It is convinced by investigating time-series instantaneous flowfields and auto-correlation coefficients of three simulation cases with different convective Mach number. Components of compression waves in supersonic cavity flows are summarized and their features are discussed. Proper orthogonal Decomposition (POD) in frequency domain is firstly employed to analyze wave propagations inside cavity. Results statistically show the propagation traces of notable compression waves inside cavity which are affected by high-speed recirculation flows.

本文言語English
ホスト出版物のタイトル40th AIAA Fluid Dynamics Conference
出版ステータスPublished - 2010 12月 2
外部発表はい
イベント40th AIAA Fluid Dynamics Conference - Chicago, IL, United States
継続期間: 2010 6月 282010 7月 1

出版物シリーズ

名前40th AIAA Fluid Dynamics Conference

Other

Other40th AIAA Fluid Dynamics Conference
国/地域United States
CityChicago, IL
Period10/6/2810/7/1

ASJC Scopus subject areas

  • 流体および伝熱

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