贴体与边界正交网格及大迎角涡流计算

本文应用空间理想非均匀线性弹性力学平衡关系生成三维贴体与边界正交网格。通过弹线性的刚度来控制网格的密度，并且自动调整边界节点上外力分布使网格线与边界正交。文中还用欧拉方程有限体积法三步显式时间推进及焓修正方法求解了绕三角翼的大迎角流动。计算结果表明这种方法能够较好模拟跨声速胶体涡流动。

Body-Fitted Grids Perpendicular to the Boundary and the Calculation of Vortex Flow at High Angles of Attack

Three-dimensional body-fitted grids perpendicular to the boundary are generated in this paper by applying equilibrium relation of forces acting on the ideal non-uniform linear elastic lines. The mesh density is controlled by adjusting the stiffnesses of the elastic lines,and the grid lines are made perpendicular to the boundary by automatic selection of the force distribution at the boundary nodes.Flows around delta wing at high angles of attack are solved by using finite volume method of Euler equations through three-stage explicit time stepping and enthalpy correction method.