Question

A centrifugal radial water pump has the dimensions shown in Fig. P12.15. 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 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. Calculate the power required to drive the pump.

Name: A centrifugal radial water pump has the dimensions shown in Fig. P12.15. The volume rate of flow is 0.25 ft^3 / s, and the absolute inlet velocity is directed radially outward. The angular velocity of the impeller is 960 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. Calculate the power required to drive the pump.
Uploaded: 2022-05-19T18:51:47-08:00
Duration: 1 min 46 s
Channel: Penny Riley

          A centrifugal radial water pump has the dimensions shown in Fig. P12.15. 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 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. Calculate the power required to drive the pump.

Added by Arthur C.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Penny Riley

05/19/2022

Step 1

Given: Volume flow rate, Q = 0.25 ft^3/s Inlet radius, r1 = 5.5 inches = 5.5/12 ft Blade width, b = 0.75 inches = 0.75/12 ft Calculate the inlet velocity V: V = Q / (2 * π * r1 * b) V = 0.25 / (2 * π * 5.5/12 * 0.75/12) V ≈ 1.38 ft/s Show more…

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A centrifugal radial water pump has the dimensions shown in Fig. P12.15. 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 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. Calculate the power required to drive the pump.