中文摘要：

应用计算流体力学方法,采用重叠网格策略,对2个简化DrivAer模型的弯道会车进行了数值模拟,研究了绝对速度、相对速度和横向间距改变情况下,两车气动六分力的变化规律.结果表明：车辆在极短的会车过程中,侧向力、侧倾力矩和横摆力矩都发生了方向的变化,迅速达到各自的正负极值,并且随着车辆行驶速度的增加,这种变化趋势更加明显;相对速度改变时,车辆周围流场的相互干扰随着速度的增加而不断增强;在间距改变条件下,气动力峰值随着会车间距的减小而增加,这些都会对车辆的操纵稳定性带来一定的影响.

英文摘要：

The computational fluid dynamics with overlapping grid was used to conduct the numerical simulation of two simplified DrivAer model for curve crossing. The effects of absolute velocity , relative velocity and lateral distance on the six aerodynamic forces were investigated. The results show that the directions of side force , rolling moment and yawing moment are changed when cars pass each other , and their values reach the maximum or minimum values in short time interval. The changing trend becomes more obviously as the absolute velocity is increased. When the relative velocity is increased , the flow field interference of both cars is enhanced. The maximum values of aerodynamic forces are increasedwhen the lateral distance is decreased. All of these can affect the vehicle handling stability.