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Sunday, September 18, 2011

Bladeless fan construction

Yes I am building a wind tunnel... and the biggest problem in doing so is getting rid of turbulence from the air source, in this case a fan. So to do that I am building a fan (air source) that should have a limited amount of disturbed air. What I want is a smooth airflow into the test area and a bladeless fan seems to be the obvious choice..
      
I built a fan like this before HERE but didn't provide too many details of the construction. This time I built a slightly bigger fan and have provided all the details in a neat video.
   
Enjoy!
      
        

Email me with questions or leave a comment... There is a lot more to come on this topic so stay tuned...

8 comments:

  1. It's called an eductor. That's a good idea though as it probably have a lot less turbulence that straight from the blades would. A nice use of recycled materials!
    Lee B

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  2. Turbulence from a fan is easy to control... Put the fan downstream from your test region. Don't push the air through the tunnel, pull it through the tunnel.

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  3. Anonymous,

    Thanks! You are right a "suck down" tunnel is easier to do. At the time i built the "bladeless fan" I was considering creating a closed circuit wind tunnel because I needed smoke. I ended up building a open tunnel with the fan downstream:
    http://ottobelden.blogspot.com/2011/10/plasma-actuator-airfoil-wind-tunnel.html

    - Otto

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  4. Hi Otto Belden, nice site, really love your projects specially this one. Wanna make one too. I wish that you included the the whole fan in your video as in the whole assembled thing not with the Schlren!@# photography thing, (haha sorry cant even memorize the spelling) :-) aneways thnx for this vid

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  5. omersonster,

    Thanks for checking out my blog, I'm glad you like it! The video shows how to make the fan. Check out the site Index of Projects link for other posts I made about the fan and the Schlieren stuff.
    I'm not sure what you mean about "the whole fan"? Do you mean the assembled fan?

    Otto

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  6. hi otto

    love your site. i've been working on a plasma propulsion project for a bit and think the schleilian photo method might provide some answers. here's a link to my candle plasma drive on youtube, what do you think? would this photograph well?

    nickobert.testein@gmail.com

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    1. Hello Nick,

      I didn't see a link to your video maybe you can send it to me? ottobelden@yahoo.com
      Thanks for checking out my blog!

      Otto

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