Hiroshima University Graduate School
Hiroshima University
Japan Aerospace Exploration Agency
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料: 航空宇宙数値シミュレーション技術シンポジウム2005論文集
雑誌名(英)
JAXA Special Publication: Proceedings of Aerospace Numerical Simulation Symposium 2005
巻
JAXA-SP-05-017
ページ
112 - 117
発行年
2006-02-28
抄録（英）
The curvature of the wall along the flow direction gives the fluid particles the centripetal force caused by the pressure gradients, which is essential to make the complicated secondary flow such as the Goertler vortices. In spite of several experimental and numerical researches for the incompressible curved flows, the mechanism causes the secondary flow pattern is not clearly explained. Analyzing the results obtained by direct numerical simulations of the compressible viscous flow in the curved duct for the Dean number Dn = 271, we demonstrate that flow helicity distributions signify the secondary flow well and that the acceleration differences between viscous and inviscid flows are essential to specify the area where the curvature effect of the wall governs the fluid particle motion. Finally, we indicate the generalized inflection points of the simulated flow velocity profiles.
曲がりダクト内圧縮性流れに及ぼす曲率の影響
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