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Big, unconventional blades | 9 comments (9 topical)
Re: Big, unconventional blades (3.00 / 0) (#9)
by finnsawyer on Thu Jan 19, 2006 at 09:56:31 AM MST

Which part of the explanation didn't you understand?  My interest is in HAWTs, yours apparently in VAWTs.  Perhaps that accounts for your confusion.  The technique is designed for high TSR HAWTs.  As far as keeping an oar in the water, you have been all over the lake and have provided one very suspect equation and one very useless set of computer generated curves for all the splashing and churning.  Recently you stated your intention to seek funding to eliminate the shortcomings of wind mill blades by adding additional blades above and behind them. Of course, such blades will add their own shortcomings such as more drag and disturbances in the air flow.  In fact, these new blades may have the same shortcomings as the old blades.  Well, then add some more.  Nothing like complicating matters.  Above all, have fun.

One thing more.  It appears that your reason for adding the extra blades is to cause the air flow over the original blades to be laminar.  Well, if memory serves me right, I believe that in wind tunnel tests involving model air foils it was found that the air flow was laminar, whereas in larger air plane wings it is laminar only over the leading few inches.  You may, in fact, be trying to solve a non existent problem when it comes to windmill blades.  
GeoM
[ Parent ]



Big, unconventional blades | 9 comments (9 topical)

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