三维绕空腔流的有限元数值模拟及流场拓扑结构  

Finite Element Numerical Simulation and Topological Structures of Supersonic Flow over Three-Dimensional Cavity

作　　者：王晓敏[1] 姜贵庆[1] 王岩[1] 

机构地区：[1]北京空气动力研究所

出　　处：《空气动力学学报》1996年第3期316-321,共6页Acta Aerodynamica Sinica

摘　　要：本文用一种高分辨率、无波动有限元法［１］对三维空腔绕流进行了数值模拟。从计算结果中可以清晰地看到激波的移动，剪切层的波动，旋涡的变化和三维分离，其流场分辨率是令人满意的。By using an explicit non-oscillatory dissipative FE scheme (END) [1], base on flux splitting technique and satisfying the entropy increasing condition, numerical simulation of flow-field characteristics of supersonic flows over three dimensional cavities succeeds. The topological analysis of flow field shows: (1) The numerical simulation reveals the oscillatory property of cavity flows. (2) The location of saddle point affects the shear layer structure, when the saddle point appears near base of cavities, it reveals a clear shear layer. (3) The attached spiral point controls that the fluid flows out the cavity. (4) The transfer regime from separated spiral point to attached spiral point is a limit cycle.

关 键 词：空腔流 有限元 拓扑分析 三维流动 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]