Wind Tunnel Moving Airfoil Test2 Video

Another flow visualization test while changing the angle of attack on a semi-symmetrical airfoil. Please see http://tomcarlone.com/WindTunnelProject.html for more details on the project.

Okay you got the ...
Okay you got the relative air over then aerofoil, now where? is it underneath? This wing would never fly since it's only experiencing pressure on top of it and no effects under it...

The wind tunnel in ...
The wind tunnel in this video had a contraction cone that went from a 25" diam intake to a 14" square test section. The speed in the video is about 5mph. This wind tunnel got up to about 30mph but at the higher speeds, the smoke dispersed too much? to see. Good luck!

what is the wind ...
what is the wind speed in ur tunnel, and what shape would u recommend the wind tunnel to be in? Also what is the dimension of ur wind tunnel. Thanks a lot because i have? recently built mine and it didn't work that well :(

THIS IS GREAT IT ...
THIS IS GREAT IT SHOWS WHEN THE WING? STALLS

aim the damn smoke ...
aim the damn smoke directhly? at the leading edge of the airfouil....when doing this you can finally demonstrated the flow of air during bernoullies principle....lol...

Um, This was? ...
Um, This was? awesome, thank you!

We filled a 2L soda ...
We filled a 2L soda bottle with warm water, dropped in some dry ice, and then screwed the cap back on. We modified the cap so that it fed directly to a narrow hose which was used as the wand to? direct the 'smoke'

what did you used ...
what did you used to make the smoke? or fog ?

what did? you used ...
what did? you used to make the smoke or fog

@fundipiz the smoke ...
@fundipiz the smoke is just introduced through a small tube right in front of the settling chamber. the smoke is sublimated dry ice. and the wing is hotwire cut out of foam insulation.?

Assuming the wings ...
Assuming the wings chord, and and inflow velocity stayed the same, a different fluid would yield different results. This is due to the Reynolds number across the wing being different. However, if you scaled all your dimensions (chord, velocity, viscosity) properly, then you? could achieve similar effects. Great build though, I'd suggest investigating "wall effects" because of the small domain. It can dramatically change the flow across the wing!

did YOU make this ...
did YOU make this windtunnel? if so howd u set? it up? how big is it?

I would image you ...
I would image you would get the same? or similar result with any fluid medium. Our tunnel was made to only work with air so we did not test other fluids

does this thing ...
does this thing show the same result in a fluid medium...such? as oil or water?

have you ever tried ...
have you ever tried aiming the smoke? at the thing? Duffus.

Can you show ...
Can you show different types of aerofoils.. in particular a laminar flow (p51 or A26 or something)? Also, it would be neat to see flaps up/down. Only problem is you cant see the smoke on the leeside of the wing. Maybe attach a piece of string to? it?

hi tomcarlone, we ...
hi tomcarlone, we have a 50m/s suction type wind tunnel. we want to? do the flow visualization on various models, using a normal studia smoke generator. we tried connect the smoke gen to the smoke probe inside the test section using a high pressure tube. but the smoke condensed right away as soon as we on. can you tell me how can we fix this problem?

Have you tried the ...
Have you tried the same experiment with a vortex traps thx good? vedio

would it be ...
would it be possible to do an experiment with helicopters? and wake turbulence?

Thanks, the airfoil ...
Thanks, the airfoil shown in this video is from a foam model airplane wing. We are in the process of making more videos with some other models. Is there something in particular that you would like to see??

Awesome video (and ...
Awesome video (and simulation)! Have you ever tried doing the same experience with a? model aircraft?

thank you for your ...
thank you for your help? :)

There are many ...
There are many options depending on your particular application. If you want to do something similar to this demonstration, you? should hot wire cut an airfoil out of a foam block. Or, you can build a balsa frame and cover it with lightweight covering. Fiberglass or carbon fiber may also be an option. If you are having problems bending the aluminum, you can make a solid aluminum leading edge.

i am currently ...
i am currently building an airfoil, and the aifoil is made from aluminium. I have some problems with bending the aluminium on the leading edge, what material do? you think is appropriate.

I believe it was ...
I believe it was made of foam by hot-wire cutting it over? a pre-made profile

how u? created the ...
how u? created the wing?

how did u make the ...
how did u make the wing and its pulling wire? which materials ? are they made of?

Uh, why don't you " ...
Uh, why don't you "google" that and get an immediate answer??

how did u create ...
how did u create the smoke? i need to? do the same for a science fair project. Thanks in advance

how did you get the ...
how did you get the dry ice to flow in such a condensed line? would you mind showing us your whole? rig, including the fan and dry ice creater? Im doing a science fair project and i need some help on creating a wind tunnel with smoke.