NOTE: These are preliminary results from a simulation after 3000 iterations, still not a fully converged solution. We will also talk about local contributions. Tecnically speaking, pressure drag makes sense as drag only after it’s been integrated over the surface of a closed body , and although the front and rear wings have opposed segments (if you take a segment of constant y you get a closed loop) the local drag contribution we are considering rises some questions. We’ll take our chances anyways.
The largest contribution to drag comes from the rear wings, being the next contributor the frontal end of the car.
Most of the car generates downforce, being the front wing the largest contributor to downforce. Even though the front wing has fewer elements and a smaller exit angle that the rear wing, it gets clean undisturbed air and is influenced by the ground effect.
You can compare this results with the ones from a FSAE without any aerodynamic elements in the following project:
- McLean, J.D., “Understanding aerodynamics: arguing from the real physics,” 1st ed., Wiley, Chichester, ISBN 978-1-119-96751-4, 2012.