1. A centrifugal water pump with a 200 mm diameter impeller rotates at 1750 rpm. Its width is 20 mm and the blades are curved backwards so that β2 = 60° . If the flow enters the pump in the axial direction, and the volume flow rate is 100 L/s, estimate the power input if the pump is 100% efficient.
2. A centrifugal pump is designed to have a discharge of 600 gpm against a head of 200 f t. The impeller outlet diameter is 12 in., and its width is 0.5 in.. The outlet blade angle is 65° . What is the design speed and the minimum horsepower required to drive this pump?