FSAC赛车车身空套设计和仿真分析

Design and Simulation Analysis of FSAC Racing Aerodynamic Kit

针对FSAC赛车在高速行驶时的空气动力学性能问题,进行了车身和空气动力学空套设计和仿真分析的研究。车身设计灵感来源于海豚,进行草绘建模等前期工作。空气动力学套件设计了前翼和尾翼,通过理论计算设计前后轴轴荷分配,根据目标值在Profili软件里进行翼片的选型,对比不同攻角下的翼片组合状态。在ANSYS-Fluent软件中设计不同速度的仿真工况,优化出前翼攻角主翼、襟翼分别为6°、45°,尾翼攻角主翼、襟翼、小襟翼分别为15°、25°、60°时,对比有无空套时各方案的整车外流场气动性能。仿真结果和实车实验表明,赛车具有良好的空气动力学性能,在20 m/s时,赛车的下压力达到478.402 N,升阻比达到2.65,赛车可获得较高的车速和良好的操纵稳定性。

Aiming at the aerodynamic performance of FSAC racing car at high speed,the design and simulation analysis of the body and aerodynamic sleeve were studied.The body design was inspired by dolphins,and preliminary work such as sketch modeling was carried out,and the front wing and rear wing in the aerodynamics kit were designed,and the fins were selected in the Profili software according to the target value,and the combination states of the fins under different attack angles were compared.The simulation conditions at different speeds were designed in the ANSYS-Fluent software.When the attack angles of the front wing,main wing,and flaps are optimized to be 6°and 45°respectively,and the attack angles of the tail wing,main wing,flaps,and small flaps are 15°,25°,and 60°respectively,the aerodynamic performance of the entire vehicle in the external flow field with and without empty sleeves is compared.The simulation results and real vehicle experiments show that the car has good aerodynamic performance.At 20 m/s,the downforce of the car reaches 478.402 N and the lift drag ratio reaches 2.65.The racing car can obtain higher speed and better handling stability.