Random Wind Tunnel and Smoke Pictures Thread

[kach22i]

Designed with the wind tunnel


Video on same:
Designed with the wind tunnel

[freebeard]

It appears to have a perforated plate ahead of the front wheel. Maybe to allow cooling air to the front brakes?

It's not clear how it sits relative to the bellypan.

[aerohead]

Originally Posted by kach22i

Designed with the wind tunnel


Video on same:
Designed with the wind tunnel

'wish there was a way to freeze-frame the image of the boat-tailed streamlines converging at the rear.They speak volumes.Thanks again.

[botsapper]

Dragster, ready for the Pro Stock class. A Mopar compact sedan with it's 50th yr anniversary Hemi engine underneath a wind tunnel tested aero-body.

https://www.youtube.com/watch?v=h5DhkTLB2hM

[kach22i]

Originally Posted by aerohead

'wish there was a way to freeze-frame the image of the boat-tailed streamlines converging at the rear.They speak volumes.Thanks again.

I sincerely doubt real air moves as cooperatively and as idealistically as the computer model illustrates. However I commend the presentation of design intent and design process with unspoken word in the animation.

For instance, you can clearly see how an upper grille block is supposed to work.

Originally Posted by botsapper

Dragster, ready for the Pro Stock class...........

Thank you for posting this, for the last few evenings I've been sketching up my inverted wing body design, and recently revised the wheel wells to something similar to this dragster. Feels like confirmation to me.

Random image:

CFD - Why F1 Teams Change Wings For Monza - Angle of Attack
CFD - Why F1 Teams Change Wings For Monza - Angle of Attack

Basically the larger the Pressure Difference the stronger the Vortices and Induced Drag, and an increase in Angle of Attack tends to create an increase in Pressure Difference. This known phenomenon is backed up by the CFD results on this simulated Formula One Rear Wing shown above. - See more at: CFD - Why F1 Teams Change Wings For Monza - Angle of Attack

[aerohead]

Originally Posted by botsapper

Dragster, ready for the Pro Stock class. A Mopar compact sedan with it's 50th yr anniversary Hemi engine underneath a wind tunnel tested aero-body.

HOT ROD Magazine mentioned a while back that the Pro Stock hood scoop on their Camaro Bonneville LSR car reduced the car's road load by over 100-hp compared to the raw,exposed supercharger and bug-catcher.

[kach22i]

I don't think this representation below is accurate in any way.

Siemens UK - Wind tunnel

2012-Dec-05
Using a wind tunnel helps car designers test the shape of a design. The car is stationary and air is blown towards it. Streams of smoke are used to show what the air is doing. Engineers are looking for the least turbulence.

I'm not sure what they are trying to pull off here, air does not move that way.

Even the car looks fake.

And where the heck did that ground plane reflection come from?
.................................................. ............................

Below is what a normal coupe of that era looks like in a wind tunnel.

http://www.autospeed.com/cms/article...art-4&A=108676

[kach22i]

Totalcar Magazine - Used Cars - The first, the last

[CFECO]

At what speed are all these tests done? I'd think if the air was going 100 mph the flow would be much different than if it was going ten MPH. Without knowing the speed for each test photo, they are basically meaningless.

[kach22i]

Originally Posted by CFECO

At what speed are all these tests done? I'd think if the air was going 100 mph the flow would be much different than if it was going ten MPH. Without knowing the speed for each test photo, they are basically meaningless.

I'm sure Aerohead can correct any mistakes I'm about to make, but my understanding is that you don't have to worry too much about things less than 30 mph, and +30 mph acts very much like 200 mph.

If I'm not mistaken I think the air is moved at around 62.5 mph or 100 km/h for most tests.