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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-14-2013, 11:42 AM   #1 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,158
Thanks: 120
Thanked 2,790 Times in 1,959 Posts
Random Wind Tunnel and Smoke Pictures Thread

There is something reassuring and comforting about wind tunnel and smoke pictures, at least for me.

Post them if you have them.

Mercedes-Benz-Blog: The new Mercedes-Benz E-Class Cabriolet - TecDay Aerodynamic 2009 - PART X


Dodge - 2010 Ram 1500 - Design - Best In Class Aerodynamics


100 Year-Old Aerodynamics Problem Solved: Could Increase MPG Dramatically
By Ovidiu Sandru ..............September 27, 2008
100 Year-Old Aerodynamics Problem Solved: Could Increase MPG Dramatically - The Green Optimistic

Quote:
MIT researchers discovered the solution to a problem put 100 years ago by Ludwig Prandtl. It refers to the situation when, for example, a car accelerates up and down a hill, then slows to follow a turn, and the airflow around it cannot keep up and separates from it. This aerodynamic phenomena creates an additional drag, slowing the car, and forcing you to push harder on the pedal, consuming more gas. The same applies to airplanes, boats, subs, and generally, any moving object following the rule mentioned above.
Around 50 images in this thread alone:
Car Wind Tunnel Data

__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
  Reply With Quote
The Following 4 Users Say Thank You to kach22i For This Useful Post:
beluga (02-26-2014), bondo (08-14-2013), Cd (08-14-2013), christofoo (08-15-2013)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 08-14-2013, 12:54 PM   #2 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,585
Thanks: 2,872
Thanked 1,120 Times in 679 Posts
Fantastic idea ! I hope this gets pinned.

By the way, that Dodge has the smoke PhotoShopped in. ( They wish it looked that good ! )

It is much closer to this Ford :
  Reply With Quote
The Following 2 Users Say Thank You to Cd For This Useful Post:
aerohead (08-14-2013), christofoo (08-15-2013)
Old 08-14-2013, 02:49 PM   #3 (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
A2WT HomePage. They are a wind tunnel that anyone can use (assuming you are willing to pay for the time) to test their cars. Many pictures and vids on their websites. Most cars aren't small eco-boxes like our but you can watch the videos and see how things really help or hurt aero.
__________________
-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
The Following User Says Thank You to spacemanspif For This Useful Post:
aerohead (08-14-2013)
Old 08-14-2013, 04:12 PM   #4 (permalink)
Master EcoModder
 
bondo's Avatar
 
Join Date: Jan 2008
Location: Arkansas
Posts: 279
Thanks: 90
Thanked 240 Times in 90 Posts
A2 Wind Tunnel

Nice tunnel with a great crew. In the picture below is Dave Salazar the General Manager. He is an Aero Engineer and he has forgotten more than I will ever know. They have two tunnels there, the smaller A2 tunnel (which I could afford) and a much larger tunnel NASCAR uses adjacent to it which gets pricy quick.

One problem with wind tunnel testing a large vehicle in a wind tunnel with a small cross section, is that the final Cd number may be skewed due to the compression of the air between the walls of the constricted test chamber and the large frontal area of a vehicle like a full size truck. Best to test a small car in the A2.

It is fun to watch the smoke though!

Bondo
Attached Thumbnails
Click image for larger version

Name:	P1010524.JPG
Views:	580
Size:	61.9 KB
ID:	13617  
  Reply With Quote
The Following 3 Users Say Thank You to bondo For This Useful Post:
aerohead (08-14-2013), bikeprof (09-28-2013), Cd (08-14-2013)
Old 08-14-2013, 04:54 PM   #5 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,158
Thanks: 120
Thanked 2,790 Times in 1,959 Posts
Quote:
Originally Posted by spacemanspif View Post
Interesting video.

Got me to wondering about that VW wind tunnel with a rotating turntable base to simulate crosswinds. When I have the time I'll post something on that.

RE: Photoshop Dodge truck smoke.

They fooled me, I hate when that happens. Proves once again that you cannot trust everything you see on the Internet.

Random pictures, like the thread title says:

http://www.a2wt.com/Pictures.htm


Attached Thumbnails
Click image for larger version

Name:	A2-schloerwg.jpg
Views:	519
Size:	79.1 KB
ID:	13760  
__________________
George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html

Last edited by kach22i; 09-12-2013 at 08:48 AM..
  Reply With Quote
The Following User Says Thank You to kach22i For This Useful Post:
aerohead (08-14-2013)
Old 08-14-2013, 05:06 PM   #6 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,585
Thanks: 2,872
Thanked 1,120 Times in 679 Posts
kach22i : Would it be all right with you if we also post tuft tests here as well ?

Unless you really know what to look for, I'm guessing most of us can't see turbulence with smoke testing as easily as you can with tuft testing.

With tuft tests, you can literally see the pockets of air that are causing problems and the direction of the airflow.
  Reply With Quote
Old 08-14-2013, 05:09 PM   #7 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,585
Thanks: 2,872
Thanked 1,120 Times in 679 Posts


Turbulence !
  Reply With Quote
The Following User Says Thank You to Cd For This Useful Post:
aerohead (08-14-2013)
Old 08-14-2013, 05:14 PM   #8 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,585
Thanks: 2,872
Thanked 1,120 Times in 679 Posts


By looking at the smoke stream, it looks as if the wind speed here is moving at a crawl.

I think GM doesn't wan't to show how bad that the drag is on the new Camaro. And note that this only shows the roofline. I'd like to see them test near that open grille.
Aero disaster !
  Reply With Quote
The Following 2 Users Say Thank You to Cd For This Useful Post:
aerohead (08-14-2013), bikeprof (09-28-2013)
Old 08-14-2013, 05:16 PM   #9 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,585
Thanks: 2,872
Thanked 1,120 Times in 679 Posts
  Reply With Quote
The Following 4 Users Say Thank You to Cd For This Useful Post:
aerohead (08-14-2013), beluga (02-26-2014), Flakbadger (09-26-2013), yoyoyoda (02-27-2014)
Old 08-14-2013, 05:20 PM   #10 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,585
Thanks: 2,872
Thanked 1,120 Times in 679 Posts

  Reply With Quote
The Following 3 Users Say Thank You to Cd For This Useful Post:
aerohead (08-14-2013), mcrews (02-25-2017), yoyoyoda (02-27-2014)
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