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Is this a new windmill concept ? i just drew it up

Started by Haliburton, May 02, 2008, 08:26:32 PM

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Haliburton

#5
May 03, 2008, 04:05:13 AM
the bottom of the shield produces a Venturi effect downwards,  i wonder if this wind turbine is more practical than a windmill
???

Doug1

#6
May 03, 2008, 06:47:18 AM
 It looks possible and sort of like the Coanda effect. I think if you place ribs on the incline side of your
leading air foil you would cut down on surface resistance between the incoming air stream and the surface of flat plate that is forcing the air up into the blades. Air will cavitate in the ribs allowing the incoming air flow to slide over the cavitating swirls in the ribs with very little drag as compared to air passing over a smooth flat surface. Surface tension is good for blades not for channeling flows. You can examine the effect with how an open tail gate on a pick up truck actually reduces gas millage.
  I use the same properties in the application of thermal emissive coatings a rate of 3 to 1 to increase cooling effeciencies with a highly reduced drag compared to smooth surfaces. The cooling wont help you but the lower drag on the incline foil will greatly improve your use of the lower wind speeds.
   Of course if you want to get fancy or complicated you could make use of the incline plate for a heat sink/ heat pump with peltiers and a joule thief to add temperature stability to your gen. Keeping things simple usually wins in the end.

Ren

#7
May 03, 2008, 06:26:12 PM
Nice concept. I wonder if you could incorporate it into a VAWT design. Check the windmills out on this page.

http://www.platek.com/wind/verticals.html

Doug1

#8
May 04, 2008, 10:23:37 AM
 Thats is a good use of the convection uplift off the home roof top to aid the wind gen.
  Waste not want not.
  Pretty sporty looking too hit it with 3 different color lights form three different positions and it would be eye catchy on top of a commercial building or apartment high rise. Shame they are not better at promoting themselves.

Haliburton
   I just noticed your picture icon thing ,thats pretty funny.
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