基于非结构动网格的跨声速非定常流场求解  

Calculation of Transonic Unsteady Flow Using Dynamic Unstructured Grids

作　　者：王军利[1] 周洲[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《飞行力学》2009年第3期78-82,共5页Flight Dynamics

摘　　要：对用于非结构动网格生成的弹簧近似方法进行了研究。通过采用顶点弹簧方法,分析研究了弹簧倔强系数的取值,同时通过引入防扭转、防挤压倔强系数和边界修正,对标准弹簧近似方法进行了改进。采用改进后的方法并通过耦合求解了基于ALE(Arbitrary Lagrangian-Eulerian)描述的Euler方程,模拟了做谐和振动的刚性无后掠机翼及某翼身组合体的跨声速绕流。结果表明,改进后的方法可以大大提高网格变形能力和网格质量,且计算结果与实验结果吻合良好。Spring analogue method for dynamic unstructured grids is studied. The spring＇ s stiffness in the modified vertex spring analogue scheme is analyzed. The standard method＇ s improvements considering the preventing extrusion and torsion stiffness coefficients and boundary effect are developed. Coupled with 3-D ALE Euler solver, this improved dynamic unstructured grid method is applied to simulate the unsteady transonic flow about a 3-D rigid wing and a wing-body. Computational results show that the new method greatly improves the deforming ability and quality of. the grids. And the results are in good agreement with those of other literatures and experimental results.

关 键 词：非结构动网格 弹簧近似 非定常流动 EULER方程 

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]