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
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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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.
Transcribed Image Text: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
Transcribed Image Text: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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