Question

A centrifugal pump discharges 300 GPM through an 8-inch diameter impeller. The fluid leaves the impeller with a tangential velocity of 17 ft/sec. If water, @ 68°F, enters the impeller via radial flow (I.E. no whirl), and the inner radius and thickness of the impeller are 1.5-inches. (Assume a constant thickness of the impeller) and if the pump speed is 1750 rpm, with a head loss of 3.5-feet. What is the Torque on the shaft?

Answer 1