厢式货车尾流特性的分析

The Characteristics Analysis of Tail Flow of a Van-body Truck

用实验的方法验证了 RNG kε紊流模型模拟厢式货车外部流场的计算精度明显高于标准 kε紊流模型 ;给出了某国产厢式货车外部流场的计算结果 ,着重分析了当厢式货车基本参数变化时 ,尾流特性的变化情况。通过计算和分析得出了尾流旋涡的位置和强度与气动阻力的关系 。

In this paper it was proved that the calculation precision of the outside flow field of the van body truck using RNG kε turbulence model is higher than that using standard kε turbulence model by means of experiments. The calculation results of the outside flow field of a certain domestic van body truck were given. And the change analysis of the tail flow characteristics was laid emphasis on when the parameters of the truck change. By calculations and analysis the relationship between the position and the intensity of the tail vortex and the aerodynamic drag was obtained, which can direct the design of the outside aerodynamic shape of the van body truck.