First attempts to apply elliptic equation of curved surfaces to generating C-type cascade grids.

首先尝试采用任意曲面椭圆方程，数值生成任意回转面上的叶栅c网格。

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It is not only introduced the two measures taken to solve the biharmonic equations, but the topical grids of H-type, C-type, and O-type are generated with this equation.

文中不仅对数值求解双调和方程的两种不同方法作了介绍，还利用该方程生成了典型的H型、C型、O型网格。

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