Wind tunnel

Reply Subscribe

Thread Tools

Search this Thread

Nov 25, 2005 | 08:54 AM

48' fordster

Thread Starter

Elder User

Joined: Sep 2005

Posts: 837

Likes: 0

From: Standish ME

Wind tunnel

Hey all I am making a small scale wind tunnel for a science project and I was wondering if anyone knew what they used to create the smoke line to test airodynamics? an info would be great. Is it like a chemical reaction?

thanks
Alec

Nov 25, 2005 | 09:12 PM

Ford_Six

Hotshot

Joined: Oct 2002

Posts: 18,488

Likes: 22

From: The Big, Oregon

Any hobby shop that sells model trains should also carry small smoke generators. These use small pellets or liquid and heat it to generate the smoke. Seuthe is a common brand.

Nov 26, 2005 | 03:41 PM

48' fordster

Thread Starter

Elder User

Joined: Sep 2005

Posts: 837

Likes: 0

From: Standish ME

thanks but will it stay in a solid stream with the wind?

Nov 26, 2005 | 09:13 PM

Traderjoe28

Senior User

Joined: Mar 2003

Posts: 288

Likes: 0

From: Northeast Wisconsin

I saw a wind tunnel once many years ago in an aeronautical engineering lab that used heated glycerin (similar to heating grease in a frying pan, but done in an enclosed container with a discharge pipe). The very dense "smoke" that was generated was piped directly to a manifold arrangement that had individual nozzles about 2 or 3 inches apart and pointed down stream in the wind flow. If the tunnel was opened without stopping the "smoke", there was really very little "smoke" that was actually being generated. Quite impressive how it worked.

Nov 26, 2005 | 09:33 PM

Ford_Six

Hotshot

Joined: Oct 2002

Posts: 18,488

Likes: 22

From: The Big, Oregon

Use a brass tube, cut the top at a 45º angle facing towards the rear, angle it slightly towards the front of the tunnel, and it should work with minimal distortion. You'll probably have to experiment with what size tubing to use.