基于迎风格式的双曲型网格生成方法

双曲型网格生成方法是一种十分适合于重叠网格方法应用的网格生成方法。为了避免双曲型方程将初始外形的不光滑性继续向外传播，本文采用了自动隐含数值耗散项的迎风格式进行数值离散。在法向推进方向，采用了隐式格式，使得网格推进步长的大小不受稳定性条件的限制。对实际应用中可能出现的边界条件进行了分类和处理。几个典型外形网格生成的质量是令人满意的，说明本文方法是成功的。

Hyperbolic grid generation using upwind scheme

A hyperbolic grid generation method based on upwind scheme has been developed. The inherent dissipation in this scheme can avoid the initial discontinuity propagating outward. Implicit scheme is adopted in the normal marching direction, so the choice of grid distance is arbitrary. In addition, an improved smoothing technique and a very effective method for the treatment of severe convex corner are presented. The robustness of the new scheme is demonstrated by grids generated for some typical configurations.