
Concept explainers
The power delivered by the pump.

Answer to Problem 3.178P
The power delivered by the pump is
Explanation of Solution
Given information:
The discharge from the pump is
Write the expression for the velocity at the inlet of the pump.
Here, the velocity is
Write the expression for the area.
Here, the inlet diameter is
Substitute
Write the expression for velocity at section (2).
Here, the velocity is
Write the expression for the area of section (2).
Here, the diameter is
Substitute
Write the expression for the Bernoulli’s equation between the inlet and outlet of the pump.
Here, the pressure at inlet is
Since both the section is at the same level from the datum plane, so the difference between the datum height at the two sections is zero.
Since the head loss due to friction is neglected.
Substitute
Write the expression for the pump power.
Here, the power is
Calculation:
Substitute
Substitute
Substitute
Substitute
Conclusion:
The power delivered by the pump is
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Chapter 3 Solutions
Fluid Mechanics
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