Abstract: In the Formula Student China (FSC) competition, the development of aerodynamic kits is a key factor in race performance. In recent years, participating teams have significantly optimized the coefficient of lift (CL) of their aerodynamic kits. This paper presents the design and optimization of the aerodynamic package for the 2025 season race car of the FSC Mengsu Racing Team. The research first establishes core metrics, ensuring the kit's weight does not exceed 10% of the vehicle's total mass while moderately increasing the kit's volume to enhance downforce and aerodynamic efficiency. Next, the Profile software is used to select airfoil profiles, followed by 3D modeling in CATIA. The design solutions include extending the main wing chord length, increasing the number of flaps, and boosting the contribution weight of the diffuser to overall downforce. A computational fluid dynamics (CFD) simulation model is then built using Star CCM+, simulating airflow under straight-line and multi-condition scenarios. Through key parameter analysis, the geometric model and meshing strategy are iteratively optimized. After finalization, the kit is manufactured using negative mold and mold closing processes to ensure surface quality meets aerodynamic requirements. The simulation indicates a significant increase in both the total downforce and the CCLa (the CL value after normalizing for frontal area) relative to earlier events, suggesting that this package improves the vehicle's cornering stability at high speeds.

Key words: formula racing aerodynamic kit; CFD simulation; ground effect; carbon fiber process

摘要： 中国大学生方程式汽车大赛（FSC）中，空气动力学套件研发是赛事竞争关键，近年 来各参赛车队空气动力学套件升力系数（CL）显著优化。文章以 FSC 梦速车队 2025 赛季赛 车为对象，开展空气动力学套件设计与优化。研究先确立核心指标，在套件质量不超整车质 量 10%的条件下，适度增大套件体积提升下压力、优化气动效率；用 Profile 软件选翼型，导 入 CATIA 三维建模，方案包括延长主翼弦长、增加襟翼数量、提升扩散器对整车下压力贡献 权重。再用 Star CCM+构建计算流体动力学（CFD）仿真模型，针对直线及多工况模拟流场， 通过关键参数分析对几何模型和网格划分策略迭代优化；定稿后用阴模合模工艺制造，确保 表面质量达到气动要求。仿真显示整车下压力及消除正投影面积影响后的 CL 值（CCLa）较往 届显著提升，表明该套件可增强赛车高速弯道行驶操纵稳定性。

关键词: 方程式赛车空气动力学套件；CFD 仿真；地面效应；碳纤维工艺