5.61 If viscosity is neglected, typical pump-flow results are shown in Fig. P5.61 for a model pump tested in water. The pressure rise decreases and the power required increases with the dimensionless flow coef-ficient. Curve-fit expressions are given for the data. Suppose a similar pump of 12-cm diameter is built to move gasoline at 20°C and a flow rate of 25 m³/h. If the pump rotation speed is 30 r/s, find (a) the pressure rise and (b) the power required.

5.61 If viscosity is neglected, typical pump-flow results are shown in Fig. P5.61 for a model pump tested in water. The pressure rise decreases and the power required increases with the dimensionless flow coef-ficient. Curve-fit expressions are given for the data. Suppose a similar pump of 12-cm diameter is built to move gasoline at 20°C and a flow rate of 25 m³/h. If the pump rotation speed is 30 r/s, find (a) the pressure rise and (b) the power required.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?

Question

100%

5.61 If viscosity is neglected, typical pump-flow results are shown in Fig. P5.61 for a model pump
tested in water. The pressure rise decreases and the power required increases with the dimensionless
flow coef-ficient. Curve-fit expressions are given for the data. Suppose a similar pump of 12-cm
diameter is built to move gasoline at 20°C and a flow rate of 25 m³/h. If the pump rotation speed is
30 1/s, find (a) the pressure rise and (b) the power required.

Pressure rise
3Q
= 0.5 +
ND³
Power
Ap
= 6.0 – 120
ND3
Pump data
(N in r/s)
= flow coefficient
ND³

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