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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-16-2013, 03:41 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Oct 2012
Location: Turkey
Posts: 26
Thanks: 1
Thanked 6 Times in 6 Posts
Front&Rear wWheel arch ventilations/air extraction for MPG

Does it help if we build

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-16-2013, 03:42 PM   #2 (permalink)
EcoModding Lurker
 
Join Date: Oct 2012
Location: Turkey
Posts: 26
Thanks: 1
Thanked 6 Times in 6 Posts
Front & Rear wheel arch ventilations/air extraction for MPG

Does it help if we build Front & Rear wheel arch ventilations/air extraction for MPG?
  Reply With Quote
Old 11-16-2013, 04:51 PM   #3 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 12,611
Thanks: 20,273
Thanked 6,281 Times in 3,888 Posts
wheel arch

Truly low drag vehicles have totally enclosed wheels.
Obviously,if you have a front engine car with front radiator,the air has got to have a pathway out.
Dr.Alberto Morelli has invested the most time of anyone I've read of to design a minimum drag cooling system at the Pininfarina wind tunnel with his CNR 'banana' car of 1978.
None of his air extractors were at the wheel houses.
The side extractors on the 1982 Pontiac Trans Am Firebird added drag.It could cost you hundreds of thousands of dollars to scientifically design these critters.And they would be designed on a case-specific basis,so what worked on one car would not necessarily benefit any different car.
I would recommend you take a cue from basjoos' AeroCivic.
http://asset1.cbsistatic.com/cnwk.1d...ide550x412.jpg
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 11-17-2013, 05:49 AM   #4 (permalink)
Master EcoModder
 
euromodder's Avatar
 
Join Date: Jul 2010
Location: Belgium
Posts: 4,667

GasDwarf - '13 Volkswagen up! EcoFuel CNG
Thanks: 176
Thanked 643 Times in 510 Posts
Didn't Hucho find that venting on top of the bonnet was the easiest way to improve efficiency ?
Might not be the most efficient way possible, but the best efficiency / effort ratio.

Vekke once had a set-up like that on his red Seat Cordoba - with radiator ducting if memory serves me well ?
  Reply With Quote
Old 11-17-2013, 06:03 AM   #5 (permalink)
EcoModding Lurker
 
Join Date: Oct 2012
Location: Turkey
Posts: 26
Thanks: 1
Thanked 6 Times in 6 Posts
I thought especially rear wheel arch extractions, I cannot close front wheels for now. I intend to do it back wheels sometimes later, but before that because of mercedes had backlights that extract air from under the car to back of the car. Or GM prototype had ventilations, or Porsche and Amg had vents from bumper, maybe that will help to cancel turbulence back of the car.
Attached Thumbnails
Click image for larger version

Name:	Merc images .jpg
Views:	42
Size:	5.8 KB
ID:	14131   Click image for larger version

Name:	Porsche-911-991-GT3-White-Clear-Tail-Lights.jpg
Views:	45
Size:	78.2 KB
ID:	14132   Click image for larger version

Name:	sls_amg_gt3_10.jpg
Views:	45
Size:	48.4 KB
ID:	14133   Click image for larger version

Name:	the-green-gm-inline-2-photo-442015-s-original.jpg
Views:	60
Size:	80.0 KB
ID:	14134   Click image for larger version

Name:	Merc Tail.jpg
Views:	40
Size:	7.7 KB
ID:	14135  

  Reply With Quote
Old 11-17-2013, 12:00 PM   #6 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: France - Paris
Posts: 762

la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.34 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 45.5 mpg (US)

Prius - '09 Toyota PRIUS Lounge
90 day: 47.37 mpg (US)

Beemer - '06 BMW F800 ST
90 day: 53.06 mpg (US)
Thanks: 188
Thanked 33 Times in 30 Posts
I have seen setup where air is taken from the front and extracted from the front of the front wheel.
I assume it is a good use of pressurized air to prevent turbulences in this area.

Seen it on Mercedes CLA and BMW 1series amongst others.
__________________
  Reply With Quote
Old 11-23-2013, 01:25 PM   #7 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 12,611
Thanks: 20,273
Thanked 6,281 Times in 3,888 Posts
easiest

Quote:
Originally Posted by euromodder View Post
Didn't Hucho find that venting on top of the bonnet was the easiest way to improve efficiency ?
Might not be the most efficient way possible, but the best efficiency / effort ratio.

Vekke once had a set-up like that on his red Seat Cordoba - with radiator ducting if memory serves me well ?
Hucho does show that.Ideally,you'd have an airtight extractor duct discharging the heated air at matched velocity with the surrounding flow so as not to introduce shear.And the cowl would have to be configured so as not to allow this air to enter the ventilation system,while providing a relatively high static pressure site for ventilation air harvesting.
Rain and snow baffles would have to be designed in as GM has done with their contemporary 191-mph Camaro and 200+ mph Corvette Stingray.
A cautionary note: If any radiator hose,or an upper or lower radiator manifold should rupture,the glycol coolant could make it through the hood and onto the windshield causing temporary blindness.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 11-23-2013, 01:29 PM   #8 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 12,611
Thanks: 20,273
Thanked 6,281 Times in 3,888 Posts
GM prototype

Quote:
Originally Posted by emre2blue View Post
I thought especially rear wheel arch extractions, I cannot close front wheels for now. I intend to do it back wheels sometimes later, but before that because of mercedes had backlights that extract air from under the car to back of the car. Or GM prototype had ventilations, or Porsche and Amg had vents from bumper, maybe that will help to cancel turbulence back of the car.
The 1999 PNGV GM 'Precept' has rear cooling,and the fenestrations in the rear quarter panels are air inlets,not extractors,of which are in the transom.

__________________
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 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com