双流混合边界的正交贴体网格生成

Body Fitted Boundary Orthogonal Grid Generation for the Field with Two Mixing Flow Channels

通过数值实验表明，用泊松方程变换形式生成的贴体坐标网格，其边界点的β值与源项呈连续单调的函数关系。根据这种关系，可以用方程迭代求根方法中的增值寻根法和对分法，使网格边界正交化。由薄壁结构相隔的两种流体混合边界正交网格生成的实例表明，这种方法对于生成适应于红外抑制器全流场计算的网格是很有效的。

Numerical experiments show that the relation between the orthogonal parameter β and the source term of the boundary point of the body fitted grids generated by transformed Poisson equation is continuous and monotone. Based on this relation, boundary orthogonalization can be achieved by the search method of stepwise extension and the bisection algorithm with iterative methods in solving equations. Examples of grids generated by this method with orthogonal boundary of two thin wall divided flow channels show that this algorithm of boundary orthogonalization is effective for the generation of the grids desired for whole flowfield numerical computation of the IR suppressor.