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  • Users: dshively
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  1. dshively

    Drag on rotating airfoil (tail wind?)

    Hello, I have a question regarding drag on a moving airfoil, as in a wind turbine. In the simplest form, say an airfoil is moving forward at zero angle of attack at a speed V with a tail wind of U. Is the drag: a.) D = Cd*1/2*rho*A*(U^2-V^2) b.) D= Cd*1/2*rho*A*(U-V)^2 Difference of the...

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