二维非结构网格的可压缩 Euler 方程流场解

Solution of Euler Equations on the Two Dimentional Unstructured Grids

讨论了非结构网格的生成方法，用Ｄｅｌａｕｎａｙ三角化方法和推进阵面法相结合的方法生成了非结构网格，提高了生成非结构网格的自动化程度和网格的质量．用有限体积法在非结构网格中求解了二维可压缩Ｅｕｌｅｒ方程，给出了单段翼形和两段翼型的算例，并与实验结果进行了比较和分析．

Both Delaunay triangulation method and advancing layers method for generation of unstructured grid are discussed.A combination of both methods to form an unique method,i.e.,the background grid is generated by using Delaunay method and space computational grid over the whole flow field is generated by advancing front method,is suggested in the present paper.The new approach improves the quality of grid and efficiency of the computation.The Euler equations on unstructured grid are solved by cell center scheme of finite volume method.Numerical examples show that the corelation of the computational results with experimental data is favorable and the needs of N S equation solver is obvious for both case of airfoil in transonic flow and multi element airfoil in subsonic flow.