Development and performance optimization of FSAE Racing Active Ground effect system based on fan drive

For FSAE cars, a significant increase in downforce can enable the car to score more points in the race and enhance the competitiveness of the vehicle. This paper focuses on the development of an active ground effect system driven by fans for the FSAE racing car . The system is designed to considerably increase the downforce of the racing car through the forced airflow generated by the fan, enable the dynamic adjustment of the aerodynamic balance of the racing car during the driving process, and achieve the vertical force control on the racing wheels, thereby improving the performance of the racing car. The Star-CCM+ software was employed to conduct CFD simulation to investigate the influence of different flow fans on downpressure and optimize the layout and position of the fan. Due to the limited power that the car can carry, the paper will also simulate and calculate the range of pneumatic balance adjustment and vertical force control capability provided by the different openings of the fan, and develop strategies for the utilization of the fan system in the race to enhance the operational efficiency of the system. Subsequently, the mechanical and electrical components required for the system are developed to meet the requirements of lightweight and stability. The system is anticipated to increase the downforce of the car by over 50% and provide a sufficiently wide balance adjustment platform. Finally, lap speed simulation is carried out to verify, evaluate the pros and cons of the system, and compare the lap time of the car without the system to ensure that the system can enable the car to obtain more points in the race.