Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Simple Reduction of Drag due to the Wheels of Road Vehicles : Regert

autogyro · 09-03-2011, 08:34 PM

More interesting wheel stuff.
There is a fascinating paper by Morelli, citing Cogotti's research (SAE 2001-01-0491), which I'll try to summarize. It's copyrighted. You need to see the pix.

Adding a centrifugal fan to the rear wheels so as to draw air from the outside through the wheel yields a 5kW savings for the 240 W expended (20.8:1 advantage) by the following:

a: narrower wake due to air suction
b: a major decrease in base drag
c. suppression of jetting vortices by means of the Coanda effect.

I'd love to see someone try this.

09-03-2011, 08:34 PM	#4 (permalink)
autogyro EcoModding Lurker Join Date: Oct 2009 Location: Massachusetts Posts: 65 Thanks: 15 Thanked 25 Times in 13 Posts	More interesting wheel stuff. There is a fascinating paper by Morelli, citing Cogotti's research (SAE 2001-01-0491), which I'll try to summarize. It's copyrighted. You need to see the pix. Adding a centrifugal fan to the rear wheels so as to draw air from the outside through the wheel yields a 5kW savings for the 240 W expended (20.8:1 advantage) by the following: a: narrower wake due to air suction b: a major decrease in base drag c. suppression of jetting vortices by means of the Coanda effect. I'd love to see someone try this.