06-13-2017, 08:49 PM
|
#651 (permalink)
|
|
Master EcoModder
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
|
__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
|
|
|
|
|
The Following User Says Thank You to kach22i For This Useful Post:
|
|
 Today
|
|
|
|
Other popular topics in this forum...
|
|
|
|
|
06-13-2017, 08:51 PM
|
#652 (permalink)
|
|
Master EcoModder
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
|
Bugatti EB110: Rise & Fall of a Supercar | Sometimes Interesting
Quote:
|
A model of an early Bugatti EB110 prototype is prepared for wind tunnel testing. (courtesy the Bugatti Registry)
|
__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
|
|
|
|
|
The Following User Says Thank You to kach22i For This Useful Post:
|
|
|
06-13-2017, 08:54 PM
|
#653 (permalink)
|
|
Master EcoModder
Join Date: Dec 2014
Location: Butte, Montana
Posts: 726
Thanks: 208
Thanked 428 Times in 279 Posts
|
Quote:
Originally Posted by kach22i
|
Do you think that properly placed VG's would bring the separation point down closer to the bumper?
__________________
1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 31.32mpg 100mi 3.193 USG 5/2/20
Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg
|
|
|
|
|
The Following User Says Thank You to gumby79 For This Useful Post:
|
|
|
06-13-2017, 08:57 PM
|
#654 (permalink)
|
|
Master EcoModder
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
|
Quote:
Originally Posted by gumby79
Do you think that properly placed VG's would bring the separation point down closer to the bumper?
|
I assume we are talking the top image - yellow VW Beetle/Bug, right?
I have no idea, I'm on the fence about those things but if they work on aircraft the principal has got to be sound, right?
I guess testing is the only thing we can believe in and I don't see a lot of actual tests published, as in wind tunnel and smoke images.
Seeing is believing.
EDIT: I did find this....................
BMW tests delta / strake style roof mounted vortex generators
http://ecomodder.com/forum/showthrea...rtex-8936.html
https://forums.nasioc.com/forums/sho...039947&page=19
A comment in that thread above by Crazy_pilot........I agree with him but the U of M video of the Ford Taurus scale model may have the answer we are looking for.
Quote:
|
I would really like to see a car driven with a fully tufted rear windshield to see the airflow with and without VGs attached. The theory is sound, but I don't know if it's being applied correctly in most of these aftermarket parts.
|
__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
Last edited by kach22i; 06-13-2017 at 09:08 PM..
|
|
|
|
|
The Following User Says Thank You to kach22i For This Useful Post:
|
|
|
06-13-2017, 11:17 PM
|
#655 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,720
Thanks: 8,151
Thanked 8,933 Times in 7,375 Posts
|
Quote:
|
Originally Posted by gumby79
Do you think that properly placed VG's would bring the separation point down closer to the bumper?
|
Vortex Generators are too much of a kludge. Their action is too localized to move things that far.
Powered solutions could do that — Coanda nozzles or plasma actuators. |
|
|
|
|
06-14-2017, 08:26 AM
|
#656 (permalink)
|
|
Master EcoModder
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
|
Quote:
Originally Posted by freebeard
Vortex Generators......action is too localized to move things that far..........
|
Aft airflow even one inch closer to the rear bumper would be an improvement.
I don't think gumby79 meant all the way down to the rear bumper.
Anyway, the images I posted show tuff attachment on rear windows at similar angles with VG use. Something to ponder.
I wonder if attempts to get aft airflow down to bumper height will meet resistance due to ground pressure wave interference and also from the air flowing under the car/truck.
I'll stick to focusing on getting air to rear spoiler for now, few things bug me more than things attached to the car that do nothing because they don't engage the air flow.
On the VW Bug/Beetle turbo the rear spoiler below the window helps fill out the profile to fit the Aero-Template fairly well I suspect - a good thing.
__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
|
|
|
|
|
06-14-2017, 12:41 PM
|
#657 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,720
Thanks: 8,151
Thanked 8,933 Times in 7,375 Posts
|
"Closer to"... "even an inch"...
I guess I took it too literally. A Coanda nozzle could blow the wake directly onto the bumper.
 |
|
|
|
|
The Following User Says Thank You to freebeard For This Useful Post:
|
|
|
06-15-2017, 08:46 AM
|
#658 (permalink)
|
|
Master EcoModder
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
|
I see that you posted that image at least once before, a few other images from that thread.
What to learn (if anything) from wind tunnel smoke lines images?
http://ecomodder.com/forum/showthrea...nes-27660.html
And another thread where it was used, just for future reference.
http://ecomodder.com/forum/showthrea...a-25351-3.html
__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
|
|
|
|
|
The Following User Says Thank You to kach22i For This Useful Post:
|
|
|
06-15-2017, 12:12 PM
|
#659 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,720
Thanks: 8,151
Thanked 8,933 Times in 7,375 Posts
|
I think the Volkhart-Sagitta will always be my favorite VW. 90mph on 25hp.
How do you find the previous postings? Site search? I actually pulled them out of an album. |
|
|
|
|
The Following User Says Thank You to freebeard For This Useful Post:
|
|
|
06-15-2017, 12:34 PM
|
#660 (permalink)
|
|
Master EcoModder
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
|
Quote:
Originally Posted by freebeard
How do you find the previous postings? Site search?.......
|
I got lucky using a Google image search where that little camera icon is, and used your hotlink address with a Copy & Paste.
The first two results were ecomodder links.
The Volkhart-Sagitta is awesome if you like efficiency, and most of us in the forum like efficiency.
https://engineered.thyssenkrupp.com/...e-wind-tunnel/
__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
|
|
|
|
|
The Following 2 Users Say Thank You to kach22i For This Useful Post:
|
|
|
