一种新的动网格方法及其应用  

A New Dynamic Grid Algrithm and Its Application

作　　者：刘学强[1] 李青[2] 柴建忠[2] N．Qin 

机构地区：[1]南京航空航天大学空气动力学系,江苏南京210016 [2]第一飞机设计研究院,陕西西安710089 [3]Sheffield University,Sheffield,S10 2TN,United Kingdom

出　　处：《航空学报》2008年第4期817-822,共6页Acta Aeronautica et Astronautica Sinica

摘　　要：介绍了一种新型的动网格方法。该方法以Delauney图为基础进行整个网格的移动变形:首先是生成满足Delauney特性的Delauney图;然后把对网格移动的特性映射到Delauney图的移动上;最后把网格点在Delauney图以映射的方式进行重新定位而得到新的网格点坐标,从而得到移动后的网格。该方法不需要迭代,因而效率高,并且能适用于任意拓扑结构的网格。以翼身组合体的机翼颤振、翼身融合体的变体过程的非定常流动等为例来说明该方法的高效性及适用面广等特点。A new dynamic grid algorithm is proposed in this article.It is based on a Delauney map,out of which deformation is carried out.Firstly,the Delauney map is generated;secondly,the mapping coefficients are calculated and the deformation is done on the Delauney map;finally,the grid points are relocated on the deformed Delauney map,and the final dynamic grid is obtained.This dynamic algorithm is non-iterative,therefore it is highly efficient and it also offers cell topological flexibility.Several unsteady cases are computated to demonstrate its roboustness,including a deformed wing-body combination and the unsteady flows during the deforming of the body of the flying-wing.

关 键 词：动网格 非定常流动 计算流体力学 飞翼 Delauney图 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]