Assignment4 - Applied Fluid Mechanics Assignment 4, Due Feb...

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Applied Fluid Mechanics Assignment 4, Due Feb 8 th , 2011 1. A Pelton wheel turbine is illustrated in the figure. The radius to the line of action of the tangential reaction force on each vane is 1 ft. Each vane deflects fluid by an angle of 135° as indicated. Assume all of the flow occurs in a horizontal plane. Each of the four jets shown strikes a vane with a velocity of 100 ft/ s and a stream diameter of 1 in. The magnitude of velocity of the jet remains constant along the vane surface. (a) How much torque is required to hold the wheel stationary? (b) How fast will the wheel rotate if shaft torque is negligible and what practical situation is simulated by this condition?
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2. The device shown in the figure is used to investigate the power produced by a Pelton wheel turbine. Water supplied at a constant flowrate issues from a nozzle and strikes the turbine buckets as indicated. The angular velocity, ω , of the turbine wheel is varied by adjusting the tension on the Prony brake spring, thereby varying the torque, T
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This note was uploaded on 02/14/2011 for the course ME 3522 taught by Professor Jeans during the Spring '11 term at University of New Brunswick.

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Assignment4 - Applied Fluid Mechanics Assignment 4, Due Feb...

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