effects of a roof wing?

[7thgear]

Originally Posted by plucas

I guess I do not understand. This was done with Computational Fluid Dynamics (CFD) which solves numerical equations fore fluid flow.

Diffusers can help flow above the car, flow before the car, and behind the car.

so a simulation...


can you zoom in on it? what does the roofline look up close?

[chrisl]

Originally Posted by 7thgear

is your graph a result of a windtunnel or just graph plots?




an acquaintance of mine did his own testing on a 2nd gen rx-7 with strings taped to the rear glass. without any form of diffuser they would be turbulent, with a diffuser they become uniform.


how close/smooth does the air flow over "sport coupes", pretty well I suppose, but from what I understand, the use of small diffusers still offers an improvement.

Diffuser? Do you mean vortex generators?

As for the RX-7, it looks like it has a significantly steeper angle for the rear window than the 86 does, so I would expect the flow to be more prone to separation there (and thus, vortex generators or something similar could be useful).

[7thgear]

yes, vortex generators.