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采用椭圆型微分方程法进行离心泵叶轮三维贴体网格的自动生成 ,可以满足网格非均匀性和网格大小可人为改变等条件。在生成网格时给定边界上的点与第一内点的距离以及两者连线与壁面曲线间夹角的边界条件 ,能使在湍流计算中广泛应用的壁面函数法的条件容易满足 ,并能使普遍采用的压力第二边界条件直接用于计算中 ,还能满足差分要求 ,减小离散误差
The ellipse differential equation method is used to automatically generate three-dimensional grids of centrifugal impeller, which can meet the conditions of grid non-uniformity and grid size changeable. The boundary condition of the distance between the point on the given boundary and the first inner point and the angle between the two lines and the wall curve at the time of grid generation can make the conditions of the wall function method widely used in turbulence calculation easy to meet, And can make the commonly used pressure second boundary conditions directly used in the calculation, but also to meet the differential requirements and reduce the discrete error