Consider the centrifugal pump impeller dimensions given in Example 10.1. Estimate the ideal head rise and mechanical power input if the outlet blade angle is changed to \(60^{\circ}, 70^{\circ}, 80^{\circ}\), or \(85^{\circ}\).

Data From Example 10.1

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Example 10.1 IDEALIZED CENTRIFUGAL PUMP A centrifugal pump is used to pump 150 gpm of water. The water enters the impeller axially through a 1.25-in.-diameter inlet. The inlet velocity is axial and uniform. The impeller outlet diameter is 4 in. Flow leaves the impeller at 10 ft/s relative to the blades, which are radial at the exit. The impeller speed is 3450 rpm. Determine the impeller exit width, b, the torque input, and the power predicted by the Euler turbine equation.