基于CFD的汽车迎面会车过程气动干扰特性仿真研究

运用计算流体力学(Computational Fluid Dynamics,CFD)数值模拟方法对在一级公路和四级公路上行驶的汽车迎面会车过程进行了仿真研究.根据迎面会车时压力场分布情况,分析流场特性对气动特性的影响,得到了侧向力和横摆力矩随间距和速度的变化情况,进而分析了其对汽车行驶稳定性的影响.结果表明:用数值模拟方法对汽车迎面会车时气动特性的研究是可行的,对公路交通控制具有重要意义.会车过程中侧向力和横摆力矩变化趋势基本相同,间距和速度对其影响很大,但影响程度不尽相同.

Research on Aerodynamic Interference Characteristics of on-head Crossing Cars Based on CFD

With the method of computational fluid dynamics(CFD),unsteady flow fields around cars were simulated for the on-head crossing cars when traveling on the first class highway and the fourth class highway.According to the distribution of the pressure fields,the influences of the flow field on the aerodynamic forces were analyzed.On the condition of the different spaces and different speeds,the transient changing of the side force and yawing moments of the cars were obtained and their influences on the stabilit...