If an ideal windmill is operating at best efficiency in a wind of (48 mathrm{~km} / mathrm{h}),
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If an ideal windmill is operating at best efficiency in a wind of \(48 \mathrm{~km} / \mathrm{h}\), what is the velocity through the disk and at some distance behind the windmill? What is the thrust on this windmill, assuming a diameter of \(60 \mathrm{~m}\) and an air density of \(1.23 \mathrm{~kg} / \mathrm{m}^{3}\) ? What are the mean pressures just ahead of and directly behind the windmill disk?
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Related Book For 
Fox And McDonald's Introduction To Fluid Mechanics
ISBN: 9781118912652
9th Edition
Authors: Philip J. Pritchard, John W. Mitchell
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