基于椭圆光顺的推进格式结构化网格生成技术  

Improving Structured Grid Generated for Configuration with Acute Convex and/or Concave Corners

作　　者：李广宁[1] 李凤蔚[1] 周志宏[1] 鄂秦[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《西北工业大学学报》2008年第5期545-549,共5页Journal of Northwestern Polytechnical University

摘　　要：提出了一种从结构化初始物面网格出发,结合泊松方程的离散求解、逐层推进的结构化网格的生成技术,并针对不同外形生成了贴体、光滑、正交的流场计算网格;针对具有尖锐凸角/凹角的物面,分别采用不同的网格光顺技术以改善物面拐角处的网格质量;讨论了针对不同拓扑结构网格选择源项的策略,以通过求解泊松方程进行网格光顺,改善网格生成质量。最后,采用几个不同的外形算例来验证该网格生成技术的鲁棒性及有效性,表明该网格生成技术能够针对不同的简单或复杂外形,生成较高质量的流场计算网格。Aim. Existing methods, which use the solution of elliptic partial differential equation to generate structured grids, meet with serious difficulty at acute convex and/or concave corners. We now present our method that we believe can minimize such difficulty. In the full paper, we explain our method in some detail; in this abstract, we just add some pertinent remarks to naming the first four sections of the full paper. The first section is： generating the grid with the parabolic partial differential equation. In this section, we discuss the grid generation based on the parabolic marching scheme. Section 2 is： generating the reference grid. Section 3 is： smoothing the grid. In this section, we discuss how to apply a special smoothing technique to the configuration with acute convex and/or concave corners to improve grid qualities. Section 4 is： choosing control functions according to the topological structure of a grid. In this section, we generate the body-fitted and smooth grid which is orthogonal to its boundary. Finally, different grids are generated for several simple or complex configurations. The discussion of the results, which are shown in Figs. 1 through 9 in the full paper, shows that the method used in this paper to generate grid is robust and efficient.

关 键 词：结构网格 抛物型泊松方程 推进 源项控制方程 正交 

分 类 号：V211.4[航空宇航科学与技术—航空宇航推进理论与工程]