侧风下大学生方程式赛车气动性能研究

以大学生方程式赛车为研究对象，采用横摆模型法对不同侧风下的赛车气动特性进行了CFD仿真和试验研究，得到了相应的气动力系数，并对不同侧风下流场中速度以及压力的分布进行了分析，探究了气动力系数和尾部流场的差异.结果表明，赛车的阻力系数和侧向力系数随横摆角的增大而增大，而升力系数并不随横摆角线性变化.赛车的下压力主要由前后翼提供，随着横摆角的增大，后翼所提供的下压力逐渐减小，而底板所提供的下压力则逐渐增大.车身所提供的阻力随横摆角的变化更为敏感.不同横摆角下，赛车尾部的涡流分布存在较大差异. 

Research on the Aerodynamic Characteristics of Formula SAE Under Crosswind

In order to study the aerodynamic characteristics of the racing car under the crosswind effects, a yawing model method was proposed for the simulation and experiment of the 2015 Jilin University''s Gspeed racing car. Analyzing the flow field velocity and pressure distribution under different crosswind, the differences of aerodynamic force and the tail flow field were studied to get corresponding aerodynamic coefficients. The results show that the drag coefficient and side force coefficient of the racing car increase with the yaw angle, however, the lift coefficient changes without the linear change of yaw angle. And the down force of the racing car is mainly provided by the front and the rear wings. With the increasing of the yaw angle, the down force of the rear wings decreases and the down force of the bottom floor increases. The drag provided by the car body is more sensitive with the yaw angle. There is a difference of the vortex behind the racing car at different yaw angles.