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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-11-2012, 05:24 PM   #1 (permalink)
DieselMiser
 
ConnClark's Avatar
 
Join Date: Jun 2008
Location: Richland,WA
Posts: 985

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
Thanks: 46
Thanked 231 Times in 160 Posts
Turbulence dissipation for boundry layer control

I stumbled across something today.

The theory is valid but the only thing I can find on it so far is written by the guy who invented it.

It works by stealing energy from the turbulence in the boundary layer and dissipates it in a way to break up the turbulence vortex. This keeps the growth of the boundary layer down and thus reduces drag.

http://www.sinhatech.com/AIAA-2006-3030-245.pdf

I'll dig some more. It might belong in the unicorn coral but I wouldn't put it there just yet.

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-11-2012, 07:12 PM   #2 (permalink)
DieselMiser
 
ConnClark's Avatar
 
Join Date: Jun 2008
Location: Richland,WA
Posts: 985

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
Thanks: 46
Thanked 231 Times in 160 Posts
Okay no unicorn coral for this. I found other research on it but can't download the articles

http://ntrs.larc.nasa.gov/search.jsp...8%2B4294874261

Kireiko, G. V. 1991 Interaction of wall turbulence with a compliant surface. Fluid Dyn. 25, 550.
__________________
  Reply With Quote
Old 09-11-2012, 08:17 PM   #3 (permalink)
Aero Deshi
 
ChazInMT's Avatar
 
Join Date: Jan 2010
Location: Vero Beach, FL
Posts: 1,065

MagMetalCivic - '04 Honda Civic Sedan EX
Last 3: 34.25 mpg (US)
Thanks: 430
Thanked 668 Times in 357 Posts
Interesting stuff. The only issue I see with this is it is for laminar boundary layer applications found on aircraft. Automobiles and such do not live in this realm. I'm 99% sure 99% of the time the air flowing over road vehicles is in a turbulent state, so this simply becomes non applicable to motor vehicles in ground effect.
  Reply With Quote
Old 09-11-2012, 09:02 PM   #4 (permalink)
EcoModding Lurcher
 
mort's Avatar
 
Join Date: Dec 2010
Location: Los Angeles
Posts: 333
Thanks: 148
Thanked 109 Times in 80 Posts
Quote:
Originally Posted by ChazInMT View Post
Interesting stuff. The only issue I see with this is it is for laminar boundary layer applications found on aircraft. Automobiles and such do not live in this realm. I'm 99% sure 99% of the time the air flowing over road vehicles is in a turbulent state, so this simply becomes non applicable to motor vehicles in ground effect.
I'd agree except for this, from the Sinha paper's references:

It seems to not be available online yet...
-mort
Attached Thumbnails
Click image for larger version

Name:	cut.gif
Views:	126
Size:	9.1 KB
ID:	11479  
  Reply With Quote
Old 09-11-2012, 09:20 PM   #5 (permalink)
DieselMiser
 
ConnClark's Avatar
 
Join Date: Jun 2008
Location: Richland,WA
Posts: 985

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
Thanks: 46
Thanked 231 Times in 160 Posts
Quote:
Originally Posted by ChazInMT View Post
Interesting stuff. The only issue I see with this is it is for laminar boundary layer applications found on aircraft. Automobiles and such do not live in this realm. I'm 99% sure 99% of the time the air flowing over road vehicles is in a turbulent state, so this simply becomes non applicable to motor vehicles in ground effect.
On a larger scale most flow on a car is laminar. On a microscopic scale all flow along a surface is turbulent. This is applicable to cars and is being applied to semis for drag reduction.
__________________
  Reply With Quote
Old 09-11-2012, 10:59 PM   #6 (permalink)
Aero Deshi
 
ChazInMT's Avatar
 
Join Date: Jan 2010
Location: Vero Beach, FL
Posts: 1,065

MagMetalCivic - '04 Honda Civic Sedan EX
Last 3: 34.25 mpg (US)
Thanks: 430
Thanked 668 Times in 357 Posts
Quote:
Originally Posted by ConnClark View Post
On a larger scale most flow on a car is laminar. On a microscopic scale all flow along a surface is turbulent. This is applicable to cars and is being applied to semis for drag reduction.
Oh Gosh, Sorry, My mistake. Cover your cars and semi's with these quick. Discuss amongst yourselves.
  Reply With Quote
Old 09-12-2012, 12:30 PM   #7 (permalink)
DieselMiser
 
ConnClark's Avatar
 
Join Date: Jun 2008
Location: Richland,WA
Posts: 985

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
Thanks: 46
Thanked 231 Times in 160 Posts
Quote:
Originally Posted by ChazInMT View Post
Discuss amongst yourselves.
How about we discuss this openly since that is what a forum is for?

__________________
  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