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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-19-2012, 02:27 PM   #11 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,547
Thanks: 7,731
Thanked 8,546 Times in 7,035 Posts
Quote:
On the R8, it is a little deceiving, the louvers are for the cooling air intake.
Déjà vu I was corrected the first time i posted that picture, was that you? I have a distinct memory of reading that decades ago. Maybe if I beat my head against a wall I can dislodge that.

As it turns out, I've been theorizing that I could use the engine cooling air as is being discussed, and place the air intakes at the top of the B-pillar to suck energy out of the vortexes that appear there. That would make the energy investment do triple duty.

Given that it was a bad example, do you have an opinion on the middle/periphery part?

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-19-2012, 08:16 PM   #12 (permalink)
Master EcoModder
 
Sven7's Avatar
 
Join Date: Aug 2011
Location: Warren, MI
Posts: 2,456

Boo Radley - '65 Ford F100
90 day: 13.28 mpg (US)
Thanks: 782
Thanked 667 Times in 409 Posts
Thanks everyone. Parallel to flow. Got it!
__________________
He gave me a dollar. A blood-soaked dollar.
I cannot get the spot out but it's okay; It still works in the store
  Reply With Quote
Old 09-19-2012, 08:22 PM   #13 (permalink)
Do more with less
 
Join Date: Jul 2010
Location: North Eastern Missouri
Posts: 930

OD - '05 Ford Econoline
90 day: 18.64 mpg (US)

Joetta - '86 Volkswagen Jetta Turbo Oil Burner
TEAM VW AUDI Group
90 day: 49.71 mpg (US)

Benzilla - '85 Mercedes Benz 300D
90 day: 28.08 mpg (US)
Thanks: 66
Thanked 177 Times in 112 Posts
Probably was me beard. I doubt if too many have owned an r8 or 10.
No idea on the reality of where is best. I would dump it into the lowest pressure zone. Let others who read nasa papers answer that.
__________________
“The further a society drifts from the truth, the more it will hate those that speak it.” George Orwell

“Before a standing army can rule, the people must be disarmed; as they are in almost every kingdom in Europe.

The supreme power in America cannot enforce unjust laws by the sword; because the whole body of the people are armed.”

Noah Webster, 1787
  Reply With Quote
Old 09-19-2012, 08:24 PM   #14 (permalink)
EcoModding Smurfer
 
Smurf's Avatar
 
Join Date: Aug 2012
Location: LaX
Posts: 293

Dime - '95 Chevy S10 LS ExtCab RWD
Pickups
90 day: 18.23 mpg (US)

G/A - '96 Pontiac Grand Am
Team Pontiac
90 day: 32.74 mpg (US)
Thanks: 52
Thanked 35 Times in 29 Posts
Maybe exit it into your boattail?
  Reply With Quote
Old 09-19-2012, 11:46 PM   #15 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,547
Thanks: 7,731
Thanked 8,546 Times in 7,035 Posts
And blow that sucker right off?

My thought experiment is to start with a complete boat-tail (my spell checker likes it hyphenated, sorry). Obviously, at full length, it ends in a round pipe. But as you truncate to make a place for legal niceties like license and tail lights, it seems the air exiting is adding to the bulk of the moving air whether it's relatively higher or lower pressure, so at the outer edge wouldn't it shed a non-turbulent curtain off the end — extending it virtually. Compared to just dumping it into the middle.

Last edited by freebeard; 09-19-2012 at 11:49 PM.. Reason: to make sense
  Reply With Quote
Old 09-25-2012, 07:00 PM   #16 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,852
Thanks: 23,907
Thanked 7,199 Times in 4,637 Posts
outlets

Quote:
Originally Posted by Sven7 View Post
We all know NACA ducts are the preferred low-drag air inlet, but I can't seem to find much on letting air out smoothly. What's best?
Morelli's work on the CNR car is the only piece I've seen which seriously delves into truly turbulence-free exits.And he didn't have to pay for his tunnel time at Pininfarina!
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 09-25-2012, 10:39 PM   #17 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,547
Thanks: 7,731
Thanked 8,546 Times in 7,035 Posts
A hint from connclark had me doing a Google Image Search on 'coanda nozzle'. I scan the pictures to find articles of interest. Probably the best was this:
Advanced Aerodynamic Devices to Improve the Performance, Economics, Handling, and Safety of Heavy Vehicles


Active control of low drag vs air braking and yaw control for crosswinds.
  Reply With Quote
Old 09-26-2012, 07:10 AM   #18 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,475
Thanked 2,950 Times in 1,844 Posts
On CarBEN EV5 I am going to use a slot vent right along the edge of the side -- the air flow coming off the side will help pull air out of the inside of the car. It also should help keep the laminar flow smooth.

__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  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