汽车外流场数值仿真的进一步研究

NUMERICAL SOLUTION OF AIRFLOWAROUND THE CAR BODY USING SSTTURBULENCE MODEL

在汽车外流场的数值仿真中,运用相对κ-ε紊流模型更为先进的SST(Shear stress transport)切应力输运模型模拟紊流效应,并采用Delaunay三角形方法生成空间非结构化网格。计算结果与汽车模型在小型风洞中的试验结果比较基本吻合,尤其是关于紊流现象的模拟更是与现实物理情况一致。

Computational calculations have been performed by solving the time-averaged turbulent Navier-Stokes equations using the SST (Shear stress transport) turbulence model, a new mathematic model better than k-e turbulence model to simulate turbulence phenomena. And the grid is generated using the delaunay method. The application of the airflow around a test car model is compared with the experimental results in order to validate a simulation method of the flow field. The calculation results and the experimental results show reasonable agreement.