三角B-B曲面在非结构网格生成中的应用  

APPLICATION OF TRIANGULAR BERNSTEIN-B(?)ZIER PATCH IN UNSTRUCTURED GRID GENERATION

作　　者：杨佃亮[1] 李颖晨[1] 丰镇平[1] 

机构地区：[1]西安交通大学叶轮机械研究所,陕西西安710049

出　　处：《工程热物理学报》2006年第z1期89-92,共4页Journal of Engineering Thermophysics

摘　　要：基于生成非结构化网格的Delaunay三角形化方法,应用三次三角Bernstein-Bézier曲面来控制网格点的分布情况。对于给定边界,利用三次非均匀B样条进行边界的拟合及重新离散。对初始化形成的Delaunay三角形,应用三次三角Bernstein-Bézier曲面来计算位于其中的点的长度标尺,通过对三角Bernstein-Bézier曲面边界点的定义来控制三角形内长度标尺的分布。对复杂通道网格剖分的实例表明,此方法可以很好地控制内部网格点的分布情况。Based on the Delaunay triangulation method in unstructured grid generation,an approach is proposed which controls grids distribution by cubic triangular Bernstein-Bézier patches.Cubic non-uniform B-Spline is applied to reform the geometric boundary,which ensures the proper mesh dimensions of the boundary nodes.The length scales of interior nodes are calculated by interpolation in triangulation using cubic triangular Bernstein-Bézier patches.The distribution of the interior grid nodes is controlled by defining the boundary nodes of cubic triangular Bernstein-Bézier patches.Fi- nally,several grid generation results in complex flow fields are shown to demonstrate the presented method.

关 键 词：非结构网格 网格生成 长度标尺 三角Bernstein-Bézier曲面 

分 类 号：TK474[动力工程及工程热物理—动力机械及工程]