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titleThe mode-selection mechanism of cross-flow instability in three-dimensional boundary layers
Other Title3次元境界層における横流れ不安定のモード選択機構
Author(jpn)高木 正平; 伊藤 信毅
Author(eng)Takagi, Shohei; Ito, Nobutake
Author Affiliation(jpn)宇宙航空研究開発機構 総合技術研究本部; 帝京大学
Author Affiliation(eng)Japan Aerospace Exploration Agency Institute of Space Technology and Aeronautics; Teikyo University
Issue Date2004-03-25
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2004-03-25
AbstractLinear stability theory predicts that the most unstable disturbance of crossflow instability in three-dimensional boundary layers is a time dependent mode rather than a stationary mode. Stationary rather than traveling mode has been predominantly observed in natural disk flow, spinning in still air, which is known to be a typical example of three-dimensional boundary layers. The present paper discusses this mode selection mechanism of crossflow instability on the basis of reviewing both experimental and theoretical research and making linear stability calculations inclusive of a wall-curvature term as well as streamline-curvature and non-parallel terms. This reveals that the wall curvature plays a key role in the mode selection mechanism of three-dimensional boundary layers and that initial amplitudes of unstable disturbances are of principal importance.
DescriptionJAXA Research and Development Report
Keywordsthree dimensional boundary layer; cross-flow instability; mode-selection mechanism; linear stability; wall curvature; streamline curvature; Reynolds number; 3次元境界層; 横流れ不安定性; モード選択機構; 線形安定性; 壁面曲率; 流線曲率; レイノルズ数
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-03-022E

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