计算物理 ›› 2006, Vol. 23 ›› Issue (3): 361-365.

• 研究论文 • 上一篇    下一篇

流场自适应叉树网格数值模拟三维复杂超声速流场

田正雨, 李桦, 潘沙   

  1. 国防科技大学 航天与材料工程学院, 湖南 长沙 410073
  • 收稿日期:2005-01-17 修回日期:2005-06-24 出版日期:2006-05-25 发布日期:2006-05-25
  • 作者简介:田正雨(1980-),男,四川仪陇,博士生,从事空气动力学和计算流体学方面的研究,国防科太航天与材料工程学院博士生队410073.

Numerical Investigation of Complex 3-D Supersonic Flows with a Self-Adaptive Tree Mesh

TIAN Zheng-yu, LI Hua, PAN Sha   

  1. Institute of Aerospace and Material Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2005-01-17 Revised:2005-06-24 Online:2006-05-25 Published:2006-05-25

摘要: 建立了基于分区结构网格的三维贴体叉树形网格的数据结构,并阐述了在此基础上进行自适应分裂/合并判别方法.为节省网格量和保证流场结构捕捉质量,提出对自适应程度进行区域性控制,以及对流场结构进行"保护"性预加密的优化方式.通过应用该网格对三维复杂超声速流场算例的计算,证明该方法对网格加密控制方便,对流场结构分辨率高.

关键词: 自适应, 叉树网格, 各向异性, 三维激波/激波干扰

Abstract: Based on an initial structural mesh, a data structure for a 3-D body-fitted tree mesh was built. Simplified algorithms were developed for anisotropic self-adaptive split and mergence. In order to reduce the number of mesh cells we set restrictive self-adaptive levels for different zones divided in advance. A method of protective mesh split for structures in flow field was developed. Numerical simulations with different complex supersonic flow patterns were shown. It is proved that the anisotropic self-adaptive tree mesh is effective with less mesh cells and convenient for mesh refinement. High resolution for Now field is obtained.

Key words: self-adaptation, tree mesh, anisotropy, 3-D shock/shock interaction

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