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New Darrieus Turbine | 31 comments (31 topical)

Re: New Darrieus Turbine (3.00 / 0) (#12)
by armidalian on Sun Jul 17, 2005 at 11:25:03 PM MST

Hmmm, an interesting idea. Perhaps rather than a spring a rubber suspension bush would do the job better - it will absorb the immediate stresses without resonating too badly. I also envisage that the main struts would be of high-tensile steel (I was thinking threaded bar but probably unthreaded would be stronger and probably cheaper). Also bracing with steel cable - all these belts and braces should make sure that the blades stay on without too much parasitic drag... and if they do disintegrate it should fail in a contained manner - with the blade fragments retained rather than fly apart. At least that would be a goal.

personally i think there are better vawt designs

Such as...? At this stage I'm open to all ideas.

[ Parent ]

Re: New Darrieus Turbine (3.00 / 0) (#13)
by bob golding on Mon Jul 18, 2005 at 04:04:40 AM MST

have a look at vawt's on the uspto website lots of designs there. think the advantage of vawt's is lots of torque at low speed. i suspect when you start trying to design a high speed vawt the advantages over a hawt diminisish. there is probably a sweet spot around 500/800 rpm i suspect. go much faster than that and balance and fatigue problems start to come up. i have all the bits to make a green windmill. looks like a good design and it is commercially available which is a good sign. always interested in new vawt designs . keep us informed of progress. good luck.

bob golding

[ Parent ]

New Darrieus Turbine | 31 comments (31 topical)

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