Question: A centrifugal pump has the following specifications: a uniform impeller thickness of 4 in., an inlet radius of l ft, an outlet radius of 2.5

A centrifugal pump has the following specifications: a uniform impeller thickness of 4 in., an inlet radius of l ft, an outlet radius of 2.5 ft, βi = 120°, and β = 135°. The pump delivers a flow rate of 70 cfs (ft3/sec) in overcoming a head of 33 ft. If the pump rotates at such a speed that no tangential velocity component exists at the inlet (shockless entry), what is the rotational speed (in rpm) of the pump? Also calculate the power input (in hp) to the pump.

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With no tangential velocity at the inlet Vti 0 and from Fig 53 we see that ... View full answer

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