用非结构网格和欧拉方程计算多段翼型绕流

Computation of the Flow past Multi-Element Airfoils Using Unstructured Grid and Euler Equations

用Delaunay法划分三角形构造非结构网格时，如果布点不当，会产生边界穿透，使网格生成失败。本文分析了几种布点情形，提出不容易产生边界穿透的布点方式。这一原理已用于生成绕多段翼型的非结构网格。在非结构网格上用Jameson的有限体积法求解欧拉方程时，本文提出一种新的激波敏感器，可区别不同方向上的压强变化。并已将这种方法成功地用于计算多段翼型的统流。

On unstructured grid using Delaunay triangulation, the boundary breakthrough would happen if the grid points are located improperly.Some cases are analysed. The one that can prevent from the boundary breakthrough is suggested. This way has been used to generate the unstructured grid for multi-element airfoils.The Jameson's finite volume method is used to solve the Euler equations, where we suggest a new shock sensor to improve it. Some computation results are given for the flow past the multielement airfoils and they are in good agreement with the experimental results.