Japan Aerospace Exploration Agency Institute of Space Technology and Aeronautics
Japan Aerospace Exploration Agency Institute of Space Technology and Aeronautics
Sanko Software Ltd.
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
144 - 149
発行年
2006-02-28
抄録（英）
Three dimensional vortex structures in the wake region behind two dimensional cylinder in the laminar flow are analyzed. In the wake-transition regime of Reynolds number between about 190 and 260, experiments show discontinuous changes of Strouhal number and the existence of two modes; Mode A and Mode B whose span wise characteristic wave length are about 4 D (D: diameter of cylinder) and D respectively. The compressible Navier-Stokes equations are solved with the finite difference method. 4th order penta-diagonal compact scheme with 4th order Runge-Kutta time integration scheme are used for high accuracy and resolution. NSCB which is generalized into the body fitted grid system is applied to the boundary condition. Numerical results show good agreements with experimental data of Strouhal number for both Mode A and B in the wake-transition regime. Span wise characteristic wave lengths for both modes are captured clearly. These results show the validity of effectiveness of highly accurate and resolution methods used here for the analysis of complex flow structures.
ストローハル数遷移領域における円柱後方の縦渦構造のシミュレーション
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