计算物理 ›› 1999, Vol. 16 ›› Issue (5): 552-558.

• 论文 • 上一篇    下一篇

三维复杂外形的非结构网格自动生成技术与应用

张来平, 杨永健, 呙超, 张涵信, 高树椿   

  1. 中国空气动力研究与发展中心, 四川绵阳 621000
  • 收稿日期:1998-06-15 修回日期:1999-02-02 出版日期:1999-09-25 发布日期:1999-09-25
  • 作者简介:张来平,男,31,助理研究员,博士
  • 基金资助:
    国家自然科学基金资助项目

Unstructured grid generation for three dimensional complex geomtries and self-adaption technique

Zhang Laiping, Yang Yongjian, Guo Chao, Zhang Hanxin, Gao Shuchun   

  1. China Aerodynamics Research and Development Center, Shichuan Mianyang 621000
  • Received:1998-06-15 Revised:1999-02-02 Online:1999-09-25 Published:1999-09-25

摘要: 给出了一套三维复杂外形的非结构网络自动生成方法。任意外形由几种有代表性的曲线和曲面来描述,将曲面变换为平面,在平面内由二维阵面推进法生成三角形网格,然后反变换为物形表面网格。空间的四面体网格由三维阵面推进法生成。四面体网格的优化采用了附加"关联质量"约束的节点松弛技术和局部的Delaunay变换技术。另外还发展了非结构网格的自适应技术。数值算例表明了方法的灵活性与通用性。

关键词: 非结构网格, 网格生成, 网格优化, 自适应技术, NND格式

Abstract: A technique on generation of unstructured grids for three dimensional complex geomtries is presented.Complex configurations are described by several typical kinds of surface patches.A 3D surface patch is first mapped to a 2D segment,then triangulated using a 2D grid generator based on the advancing front method,and finally mapped back to the original 3D shape.Tetrahedral grids are generated by an advancing front method and smoothed by a nodal relaxation technique and a Deluanay transformation.A mesh refinement technique is also given to obtain more accurate solutions.

Key words: unstructured grids, grid generation, grid optimization, self-adaption technique, NND Scheme

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