基于多重网格技术的复杂外形粘性绕流数值模拟  

Numerical Simulation of Complex Flows Based on Multigrid Method

作　　者：张威[1] 李杰[1] 冯文梁[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《弹箭与制导学报》2008年第6期189-192,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：采用基于MUSCL方法的三阶迎风偏置通量差分裂方法和隐式近似因子分解方法求解雷诺平均N-S方程。文中采用多块网格技术生成高质量网格。通过多重网格技术来加速收敛。分别使用B-L和S-A湍流模型来模拟粘性流动。通过和实验值的比较可以看出两种湍流模型都可以很好地模拟附着流和小分流的流动;当流动出现强烈激波,分离剧烈时,B-L模型计算出的激波位置总是靠后,而S-A模型计算的结果更为准确。Abstract：The three-dimensional time-dependent compressible Reynolds-averaged Navier-Stokes equations were solved with third-order upwind-biased flux-difference splitting method and approximate factorization method. The multi-block technology was used to generate high quality grid. The convergence rate was accelerated by multigrid technology.Then, the flows were simulated with B-L and S-A turbulence models. Comparing the computational results, with the experiment data, it is found that the two turbulence models can well simulate attachment flow or mildly separated flows. The shock location of B-L model lags behind the experiment data, when the shock is strong and the flow separates largely, but the computation results with S-A model match the experiment data much better.

关 键 词：多块网格 多重网格 B-L S-A 湍流模型 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]