The aerodynamic goal of EV24 was to reintroduce aerodynamic design and composite manufacturing to the team. Our requirements were to maximize downforce while maintaining low overall drag, so we chose not to build a front or rear wing. Our scope for this year included the car’s underbody, diffuser, nose cone, and side panels.

To improve the effectiveness of our aerodynamics, the leading edge of our nose cone is raised to encourage air to travel under the vehicle, improving the performance of the car's underbody and diffuser. The design of the undertray and diffuser was heavily based on the Venturi effect. We took advantage of the geometry of the frame to vertically constrict the air followed by a large expansion. The angle of the rear diffuser is 15°, as research and simulations indicated that 10° was the minimum to start observing benefits and 20° was ideal but also the most sensitive to disturbances. We also designed two “side diffusers” to generate more downforce given the limited amount of volume underneath the car. In the end,  it turned out that most of our downforce was generated by this part of the floor. They follow the same principles and have the same angle as the main floor but only constrict the volume in the vertical direction. 

Lastly, we also designed carbon panels that encapsulate the rear of the car to encourage the flow of cooling air through our radiator while maintaining a streamlined design to minimize fluid separation. The side panels also retain the 3D-printed accumulator cooling sidepod intakes. We conducted CFD and thermal analysis on the accumulator to ensure that the ram air from these intakes was sufficient for cooling during long endurance runs.