Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-27-2014, 06:16 PM   #11 (permalink)
herp derp Apprentice
 
Join Date: Oct 2008
Location: Lawrence, KS
Posts: 1,049

Saturn-sold - '99 saturn sc1
Team Saturn
90 day: 28.28 mpg (US)

Yukon - '03 GMC Yukon Denali
90 day: 13.74 mpg (US)
Thanks: 43
Thanked 331 Times in 233 Posts
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

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-27-2014, 06:17 PM   #12 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,924
Thanks: 24,012
Thanked 7,231 Times in 4,657 Posts
blades

Quote:
Originally Posted by Big time View Post
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.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 05-27-2014, 06:39 PM   #13 (permalink)
herp derp Apprentice
 
Join Date: Oct 2008
Location: Lawrence, KS
Posts: 1,049

Saturn-sold - '99 saturn sc1
Team Saturn
90 day: 28.28 mpg (US)

Yukon - '03 GMC Yukon Denali
90 day: 13.74 mpg (US)
Thanks: 43
Thanked 331 Times in 233 Posts
those are tiny holes
  Reply With Quote
The Following User Says Thank You to 2000mc For This Useful Post:
aerohead (05-28-2014)
Old 05-27-2014, 10:14 PM   #14 (permalink)
Spaced out...
 
spacemanspif's Avatar
 
Join Date: Jul 2013
Location: Dirty Jersey
Posts: 748

The New Focus - '07 Ford Focus ZX5
90 day: 32.44 mpg (US)
Thanks: 142
Thanked 205 Times in 149 Posts
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...





__________________
-Mike

2007 Ford Focus ZX5 - 91k - SGII, pending upper and lower grill bocks - auto trans
1987 Monte Carlo SS - 5.3/4L80E swap - 13.67 @ 106
2007 Ford Focus Estate - 230k - 33mpg - Retired 4/2018
1995 Saturn SL2 - 256K miles - 44mpg - Retired 9/2014

Cost to Operate Spreadsheet for "The New Focus"

  Reply With Quote
Old 05-27-2014, 11:33 PM   #15 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,802
Thanks: 7,808
Thanked 8,620 Times in 7,099 Posts
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 ——
  Reply With Quote
Old 05-28-2014, 01:25 AM   #16 (permalink)
Master EcoModder
 
doviatt's Avatar
 
Join Date: Mar 2009
Location: Utah
Posts: 388

Grey Goose (Retired) - '89 Geo Metro LSI 4 door hatch back
Last 3: 57.16 mpg (US)

Tweety - '91 Geo Metro Convertible -2 Door convertible LSI
Team Metro
90 day: 43.97 mpg (US)

Shadow - '02 Honda Shadow VT1100
90 day: 43.46 mpg (US)

Sonic - '07 Honda CBR1000RR
90 day: 42.69 mpg (US)

Filmore - '84 Volkswagen Vanagon
90 day: 20.9 mpg (US)
Thanks: 47
Thanked 44 Times in 31 Posts
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.
  Reply With Quote
Old 05-28-2014, 03:42 AM   #17 (permalink)
Master EcoModder
 
Join Date: May 2008
Location: UK
Posts: 332
Thanks: 15
Thanked 79 Times in 54 Posts
Send a message via MSN to 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.
  Reply With Quote
The Following User Says Thank You to markweatherill For This Useful Post:
aerohead (05-28-2014)
Old 05-28-2014, 12:30 PM   #18 (permalink)
PSmodder lurker
 
Join Date: Jan 2009
Location: Chino
Posts: 1,605
Thanks: 26
Thanked 908 Times in 522 Posts
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

Last edited by botsapper; 05-28-2014 at 01:31 PM..
  Reply With Quote
The Following User Says Thank You to botsapper For This Useful Post:
ChazInMT (05-29-2014)
Old 05-28-2014, 01:18 PM   #19 (permalink)
Drive less save more
 
ecomodded's Avatar
 
Join Date: Jul 2011
Location: Vancouver Island, Canada
Posts: 1,189

Dusty - '98 VOLKSWAGEN Beetle TDI
TEAM VW AUDI Group
90 day: 60.42 mpg (US)
Thanks: 134
Thanked 162 Times in 135 Posts
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
__________________
Save gas
Ride a Mtn bike for errands exercise entertainment and outright fun
__________________



  Reply With Quote
Old 05-28-2014, 05:22 PM   #20 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,924
Thanks: 24,012
Thanked 7,231 Times in 4,657 Posts
tiny

Quote:
Originally Posted by 2000mc View Post
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!

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com