| 钝体绕流流场分离涡的数值模拟 |
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| 引用本文： | 傅德薰,马延文,王力.钝体绕流流场分离涡的数值模拟[J].航空学报,1991,12(9):439-443. |
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| 作者姓名： | 傅德薰 马延文 王力 |
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| 作者单位： | 中国科学院力学研究所
(傅德薰，马延文)，北京空气动力研究所(王力) |
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| 摘 要： | 采用近似因式分解和特殊Jacobin系数矩阵分裂法,求解可压缩Navier-Stokes方程,数值模拟矩形柱体绕流流场中分离涡的形成和发展。给出了Ma_∞=0.3,0.8;Re=10~4,10~6的计算结果。从结果中可清楚地看到柱体非对称涡形成的非定常过程。
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| 关 键 词： | 钝体 分离流 N-S方程 数值计算 |
NUMERICAL SIMULATION OF THE FLOW AROUND RECTANGULAR CYLINDER |
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| Chinese Academy of Sciences Institute of Mechanics Fu Dexun and Ma Yanwen Beijing Institute of Aerodynamics Wang Li.NUMERICAL SIMULATION OF THE FLOW AROUND RECTANGULAR CYLINDER[J].Acta Aeronautica et Astronautica Sinica,1991,12(9):439-443. |
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| Authors: | Chinese Academy of Sciences Institute of Mechanics Fu Dexun and Ma Yanwen Beijing Institute of Aerodynamics Wang Li |
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| Institution: | Chinese Academy of Sciences Institute of Mechanics Fu Dexun and Ma Yanwen Beijing Institute of Aerodynamics Wang Li |
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| Abstract: | The viscous flow around a rectangular cylinder is simulated by solving the two dimensional compressible Navier-Stokes equations. The partial differential equations are approximated by difference methods such as special chosen Jacobian matrix splitting technique and approximate factorization. The scheme has second order accuracy in space and time. The Mach number Ma =0.3 and the Reynold number Re = 20000 are used in the computation. The unsteady Karman vortex separation and asymmetry of pair of vortices can be seen clearly from the computed results, The old vortices are moved downstream and the new ones are generated from the corner of the cylinder. The influence of compressibility on vortex formation is considered. The critical Reynold number Rec is increased with the Mach number increased. |
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| Keywords: | Blunt bodies separated flow N-S equation numerical calculation |
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