For a high-fl ow site with a head of 45 ft, it is desired to design a single

Chapter 11, Problem p11.85

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For a high-fl ow site with a head of 45 ft, it is desired to design a single 7-ft-diameter turbine that develops 4000 bhp at a speed of 360 r/min and 88-percent effi ciency. It is decided fi rst to test a geometrically similar model of diameter 1 ft, running at 1180 r/min. (a) What likely type of turbine is in the prototype? What are the appropriate (b) head and (c) fl ow rate for the model test? (d ) Estimate the power expected to be delivered by the model turbine

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