06-30-2008, 03:07 AM
|
#1 (permalink)
|
What? THIS IS MY GOOD CAR
Join Date: Jun 2008
Location: Eastern Washington
Posts: 285
Thanks: 0
Thanked 0 Times in 0 Posts
|
Homemade wind tunnel?
Why couldn't you use a peanut oil fog machine and a big fan for home wind tunnel testing?
Note: Wind tunnel assistant not included.
__________________
Honda...the economical, renewable resource.
|
|
|
Today
|
|
|
Other popular topics in this forum...
|
|
|
06-30-2008, 03:13 AM
|
#2 (permalink)
|
Pokémoderator
Join Date: Dec 2007
Location: Southern California
Posts: 5,864
Thanks: 439
Thanked 532 Times in 358 Posts
|
justpassntime -
Would you have to "scale" the wind speed to the scale of the model or ?!?!?!?
CarloSW2
|
|
|
06-30-2008, 03:21 AM
|
#3 (permalink)
|
Bicycle Junky
Join Date: Jan 2008
Location: Atlanta, GA
Posts: 464
Thanks: 0
Thanked 6 Times in 4 Posts
|
I wish I had the space to build a full size one. Maybe build like a small steel building in the backyard of some future house and put a fan that could simulate 60mph winds on my actual car or something...
__________________
|
|
|
06-30-2008, 10:57 AM
|
#4 (permalink)
|
EV OR DIESEL
Join Date: Dec 2007
Location: South Louisiana
Posts: 1,758
Thanks: 57
Thanked 113 Times in 86 Posts
|
My dad actually has a 5 foot (blade) diameter fan that can sustain 35 mph wind. Runs on a 2hp electric motor; barley starts on a 4kw generator but man is it nice when working outside. Hmmm
__________________
2016 Tesla Model X
2022 Sprinter
Gone 2012 Tesla Model S P85
Gone 2013 Nissan LEAF SV
2012 Nissan LEAF SV
6 speed ALH TDI Swapped in to a 2003 Jetta Wagon
|
|
|
06-30-2008, 11:26 AM
|
#5 (permalink)
|
Master EcoModder
Join Date: May 2008
Location: Ames, IA
Posts: 419
Thanks: 4
Thanked 13 Times in 12 Posts
|
I've thought about building a scale model wind tunnel. Just can't seem to find a model of the Jeep Cherokee.
A good example of a scale model wind tunnel setup can be found here.
__________________
Adjusted for my driving habits. 80%city/20%Highway.
20mpg city/30mpg highway or bust! Check out my mods so far
|
|
|
07-01-2008, 01:34 AM
|
#6 (permalink)
|
What? THIS IS MY GOOD CAR
Join Date: Jun 2008
Location: Eastern Washington
Posts: 285
Thanks: 0
Thanked 0 Times in 0 Posts
|
Try the toy section...
Quote:
Originally Posted by FastPlastic
I've thought about building a scale model wind tunnel. Just can't seem to find a model of the Jeep Cherokee.
A good example of a scale model wind tunnel setup can be found here.
|
Try the toy section at your local department store. The model wouldn't have to be a "model".
Check this out VINTAGE METAL TONKA JEEP CHEROKEE WAGONEER TOY TRUCK - eBay (item 140245515768 end time Jul-06-08 18:21:57 PDT)
__________________
Honda...the economical, renewable resource.
|
|
|
07-01-2008, 01:35 PM
|
#7 (permalink)
|
Harebrained Idea Skeptic
Join Date: Jun 2008
Location: Alpharetta, GA
Posts: 211
Thanks: 19
Thanked 13 Times in 9 Posts
|
Quote:
Originally Posted by justpassntime
Why couldn't you use a peanut oil fog machine and a big fan for home wind tunnel testing?
|
Each of those would put out turbulent flow, and together it'd be even worse. You can't put that fog through a small wand, so how are you going to target the area -- have it on a stand?
Quote:
Originally Posted by cfg83
Would you have to "scale" the wind speed to the scale of the model or ?!?!?!?
|
Yes, if one wanted to get real drag numbers. Look up "Reynolds number."
Quote:
Originally Posted by justpassntime
|
Yes, the model would have to be a model. Toys are extremely inaccurate, as proven by the link!
__________________
|
|
|
07-02-2008, 04:28 PM
|
#8 (permalink)
|
Master EcoModder
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,228
Thanks: 24,375
Thanked 7,357 Times in 4,757 Posts
|
Do want wind tunnel or data?
Quote:
Originally Posted by justpassntime
Why couldn't you use a peanut oil fog machine and a big fan for home wind tunnel testing?
Note: Wind tunnel assistant not included.
|
justpassntime,is there some specific info your seeking? I know you're aware of Reynold's Number effects, and how it effects model scaling in wind tunnels.A 1:24 Scale model would require a minimum of 480-mph wind in the test section to just simulate a turbulent boundary layer on your model .Anything short of that would yield meaningless data for you.If there's something specific you'd like to know about your car or potential projects,we may be able to help you out.I have a small tunnel I built for public demos but it's not a serious research tool.And for me,I can intuit and tuft-test in full-scale,faster and cheaper than I ever could with models.And the results are always valid 'cause its full-scale.Let us know.
.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
|
|
|
07-02-2008, 05:51 PM
|
#9 (permalink)
|
Legend in my own mind
Join Date: Apr 2008
Location: Homestead, Fl.
Posts: 927
Thanks: 2
Thanked 14 Times in 13 Posts
|
I know alot of you are DIY'ers, has anyone thought of retro fitting a spray booth as a wind tunnel? Or is it to small?
That would seem logical, plus you get the added benefit of being able to paint in it, if you maintain it properly.
__________________
Thx NoCO2; "The biggest FE mod you can make is to adjust the nut behind the wheel"
I am a precisional instrument of speed and aeromatics
If your knees bent in the opposite direction......what would a chair look like???
|
|
|
07-03-2008, 08:51 AM
|
#10 (permalink)
|
Harebrained Idea Skeptic
Join Date: Jun 2008
Location: Alpharetta, GA
Posts: 211
Thanks: 19
Thanked 13 Times in 9 Posts
|
Quote:
Originally Posted by trikkonceptz
I know alot of you are DIY'ers, has anyone thought of retro fitting a spray booth as a wind tunnel? Or is it to small?
|
It probably wouldn't be too small in cross-section, but you wouldn't have sufficient empty space in front to ensure that the oncoming air was flowing properly.
__________________
|
|
|
|