If wheels had fan like blades should they pull or push air?

[2000mc]

i think they would want to go out, with an effect kinda like an air curtain http://ecomodder.com/forum/showthrea...ain-17418.html
related paper on wheels https://fenix.tecnico.ulisboa.pt/dow...660/Resumo.pdf

[aerohead]

Originally Posted by Big time

If wheels had fan like blades should they pull air in the car wheelwells or push it out of the car?

I think for brake cooling they should push air out of the car.
Some racecars use ducts that route air out of the car.

For lower aero drag Would pulling air into the wheelwells reduce drag as it removes the boundary layer and turbulence outside the wheels?

For low drag,you'd have no blades at all,only a convex,full disc wheel cover as MOON produced.For cooling issues,you'd have some porosity near the rim.
The GM Ultralite demonstrates an optimized design.

[2000mc]

those are tiny holes

[spacemanspif]

Couple stock wheels that kind of fit the bill of this thread. The last 2 are facroty Corvette wheels that are have become very popular with the VW group that likes stretched tires and crazy camber...

[freebeard]

When I observe cars driving in the rain, I see a forward rolling stream of air ejecting from the wheelwell and streaming down the side of the car. To a greater or lesser degree. BMW uses an 'air curtain' to mimic a frontwheel skirt and minimize this.

So I'd say suck, but in order to move that much air through the wheel center, the blades would have to move at 2x or 3x the wheel's speed. So I'd KISS that one off.

For anything short of a race car or police cruiser, I'd say a few louvers punched in a Moon disk should be adequate. Rear facing innies for brake cooling.

—— another multi-page thread. I see 2000mc and aerohead covered it ——

[doviatt]

Freebeard gets it.

I don't remember the last time I worried about brake cooling. Then again I'm not driving a race car. Even my rare, but long, many mile descents from the mountains are handled in lower gear rather than brakes.

[markweatherill]

You'd need left and right handed wheels, I suppose, for any air moving capability to work the same both sides of the car.

[botsapper]

F1 banned shrouds (came off and became projectiles) and prefers heat out. http://www.formula1-dictionary.net/I...rrari_aero.png

Wheel heat extractors. http://www.formula1-dictionary.net/I...wheel_2010.jpg

But in 2013/2014, Red Bull & Ferrari have ducts that forced air into the wheel axles! http://i.imgur.com/DSyeZQg.jpg

[ecomodded]

My car has fan shaped wheels, I notice when I'm going fast enough that the car begins to leave the ground , at 75mph the car is 2 feet off the ground.. Zing

[aerohead]

Originally Posted by 2000mc

those are tiny holes

The holes are the bare minimum for specified brake cooling requirements and help contribute to the Cd 0.19.
Thanks for the image!