一种改进型洞映射法  

An Improved Method of Hole-map

作　　者：淮洋 郝海兵[1] 姚冰[1] 梁益华[1] 

机构地区：[1]中航工业西安航空计算技术研究所,陕西西安710068

出　　处：《航空计算技术》2015年第2期31-34,39,共5页Aeronautical Computing Technique

基　　金：国家"973"计划项目资助(2014CB744803)

摘　　要：针对传统洞映射法存在挖洞曲面必须封闭的局限性和消耗大量内存的缺点,提出了改进型洞映射法。主要做了两点改进:1)采用"反向标记法"判别洞映射笛卡尔网格单元属性,使得挖洞曲面不再局限于封闭的情况;2)运用"矢量射线法"进一步判断洞映射笛卡尔网格边缘单元内的计算网格点属性,使得笛卡尔网格分辨率低时仍能精确挖洞。研究表明:相比于传统洞映射法,改进型洞映射法保持了很高的计算效率和精准挖洞的能力,还极大地降低了内存消耗,并且具有较强的可靠性。The traditional hole-map method requests that hole-cutting surface should be watertight,and it needs tremendous resources to restore information. Because of these two defects,an improved hole-map method is advanced in this paper. On one hand,the usage of inverse-mark method in the improved method to judge the attribute of the Cartesian gird elements breaks through the limit of watertight hole-cutting surface. On the other hand,it＇s the vector-ray method used to determine the attribute of the computing grid points in the fringe cell for the improved method that makes hole-cutting accurate when the resolution of hole-map Cartesian grid is relatively low. The research indicates that the improved hole-map method has high efficiency,low memory consumption,capability of accurate hole-cutting and strong reliability.

关 键 词：嵌套网格 洞映射法 反向标记法 矢量射线法 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]