Generation of the 2D Unstructured Grids and the Euler Solution on It
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摘要: 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.Abstract: Computational unstructured grid is generated by advancing front method, and the structured background gird is obtained by using multigrid technique to solve the Poisson equation. A new method of boundary discretization is presented for generating the initial fronts, and a novel data structure—Array Linked List is proposed to store the grid data. The Euler equations on unstructured grid are solved by cell-centered scheme of finite volume method. Numerical examples show that the correlation of the computational results with experimental data is favorable and the need of N-S equations solver is obvious for both case of airfoil in transonic flow and multi-element airfoil in subsonic flow.
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