结构型网格分块生成技术

构造了一种适用于模拟具有复杂几何特征的流动问题的结构型网格生成方法,该方法应用CAD技术中非均匀有理B样条(NURBS)曲面表达形式,根据给定物体的典型站位截面,首先对物体进行分片表面网格的构造与重构,同时根据物体几何特征及流场特性对绕流流场进行区域分解并构造其块边界,在此基础上再采用数值方法进行相应的分块网格生成,并给出了应用所建立的方法生成的几种天地往返运输系统流场网格.

A MULTI-BLOCK STRUCTURED GRID GENERATION TECHNIQUE

A grid generation technique adaptable for flows with complex geometrical characteristics is developed. The procedure is developed in such a way that the surface grids are first constructed and/or reconstructed in multi-block manner according to the data given at typical section of the body, utilizing the nonuniformed rational B spline (NURBS) surface representation commonly employed in CAD technique. The blocks consisting of the flow field are decomposed in accordance with the geometrical and flow characteristics of the specified problem, and the boundaries of the blocks can thus be constructed accordingly. Based on the surface grids generated, a multi-block grid system for the entire flow field can then be built up by using numerical, algebraic or mixed methods. As an illustration, the grids generated by the developed technique for several space transport systems are presented.