二维非结构网格的生成及其EULER方程解

 采用推进阵面法生成三角形非结构网格,用多重网格技术求解泊桑方程以取得结构背景网格.提出了一种高效的边界剖分法,并用它来生成初始阵面.另外,还提出了一种新颖的数据结构——数组链接表,用它来存贮网格数据.用有限体积法在非结构网格中求解了二维可压缩Euler方程,给出了单段翼型和多段翼型的算例,并与实验结果进行了比较和分析.

Generation of the 2D Unstructured Grids and the Euler Solution on It

Computational unstructuredgrid is generated by advancing front method, and the structured background gird isobtained by using multigrid technique to solve the Poisson equation. A new method ofboundary discretization is presented for generating the initial fronts, and a novel datastructure—Array Linked List is proposed to store the grid data. The Euler equations onunstructured grid are solved by cell-centered scheme of finite volume method. Numericalexamples show that the correlation of the computational results with experimental data isfavorable and the need of N-S equations solver is obvious for both case of airfoil intransonic flow and multi-element airfoil in subsonic flow.