A pump impeller is to be designed to have an inner and outer radius of 150 mm and 300 mm, respectively, and an inner and outer blade width of 90 mm and 70 mm, respectively. The impeller is to have a...

A pump impeller is to be designed to have an inner and outer radius of 150 mm and 300 mm, respectively, and an inner and outer blade width of 90 mm and 70 mm, respectively. The impeller is to have a rotational speed of 1725 rpm and is to deliver a volume flow rate of 0.3 m3 /s against a head of 13.8 m. The inflow velocity should be normal to the inflow surface. (a) Design the blade angles at the inflow and outflow surfaces. (b) If the liquid to be pumped is water at 20◦C, what is the power requirement of the pump?