自适应方法在APFSDS干扰流场模拟中的应用

ADAPTIVE MESH GENERATION AND SIMULATION OF APFSDS AND SABOTS

对常用的网格自适应方法进行总结分析,指出它们的不足,在此基础上,采用基于网格局部重构的网格自适应方法对网格进行自适应,用Delaunay方法生成三维非结构网格,并对生成的网格进行了优化.以基于格心的有限体积法为基础,空间二阶精度,采用LU-SGS隐式方法求解Euler方程,网格单元边界处守恒量通量的计算采用了Hanel方法,对NACA0012翼型绕流及脱壳穿甲弹弹托分离流场进行了数值模拟,取得了较好的结果.

Some common methods on mesh adaption are reviewed and analyzed in this paper. These methods＇ shortcomings are also pointed out. In the next context, a mesh adaption method based on local mesh reconstruction is adopted. The results show that the new adaption method is efficient and the mesh qualities are improved a lot. Delaunay algorithm is adopted to generate 3D unstructured meshes and the meshes are optimized. The implicit LU-SGS method is applied to solve 3D Euler equations in this paper. Hanel method is used to calculate the flux of control face. The algorithm is based on cell centered, finite-volume approach, second-order accurate in space. Flows around a NACA0012 airfoil and APFSDS are simulated. The simula- tion results are satisfying.