本文叙述了采用正交网格的有限差分法程序进行燃烧室三维数值计算时,其计算域边界处理自动化的必要性,网格划分、阶梯壁产生的约束条件,以及程序设计的一些数学方法和技巧,给出了应用本程序对某型发动机火焰筒计算域边界i,j方向平面网格划分和边界阶梯化图形,以及k向方向分布图形。 This paper describes the necessity of using the finite difference method of orthogonal grid to calculate the three-dimensional numerical calculation of the combustion chamber, the boundary conditions of the computational domain, the meshing, the constraint conditions of the stepped walls and some mathematical methods of programming This paper gives the application of this program to a certain type of engine flame cylinder computational domain boundary i, j plane meshing and boundary step ladder graphics, as well as the k-direction distribution graph.