LotusTalk - The Lotus Cars Community - View Single Post - Can someone explain what a diffuser does?

jhnmdahl · 07-24-2008, 07:39 PM

I stand by my original post. The vacuum effect of expanding air in the diffuser region pulling the car down is a myth, although the slight vacuum behind the car does help scavenge the relatively higher velocity air from under the car, where the downforce is created (under the body of the car, not in the diffuser region). Check out:

Diffuser (automotive - Wikipedia, the free encyclopedia)

Diffuser

Secrets of Underbody Tunnels, Rear Diffusers and Venturis | Symscape

for example.

John

07-24-2008, 07:39 PM	#30 (permalink)
jhnmdahl Registered User Join Date: May 2005 Posts: 668	I stand by my original post. The vacuum effect of expanding air in the diffuser region pulling the car down is a myth, although the slight vacuum behind the car does help scavenge the relatively higher velocity air from under the car, where the downforce is created (under the body of the car, not in the diffuser region). Check out: Diffuser (automotive - Wikipedia, the free encyclopedia) Diffuser Secrets of Underbody Tunnels, Rear Diffusers and Venturis \| Symscape for example. John Last edited by jhnmdahl : 07-24-2008 at 08:13 PM.