A centrifugal radial water pump has the dimensions shown in Fig. P12.10. The volume rate of flow is \(0.25 \mathrm{ft}^{3} / \mathrm{s}\), and the absolute inlet velocity is directed radially outward. The angular velocity of the impeller is \(960 \mathrm{rpm}\). The exit velocity as seen from a coordinate system attached to the impeller can be assumed to be tangent to the vane at its trailing edge. The hydraulic efficiency is \(82 \%\) and the mechanical efficiency is \(96 \%\). Calculate the power required to drive the pump.

Figure P12.10

Transcribed Image Text:

Q=0.25 ft/s 559 + 960 rpm 11 in. 3 in.. 0.75 in.