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a) A 4 kW motor is driving an oil pump with an efficiency of 95% down a 10 mm diameter pipe. If the velocity of the fluid down the pipe is 1.8 m/s. Calculate the flow rate that the pump would deliver....

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a) A 4 kW motor is driving an oil pump with an efficiency of 95% down a 10 mm diameter pipe. If the velocity of the fluid down the pipe is 1.8 m/s. Calculate the flow rate that the pump would deliver.

b) What is the pressure that the pump can deliver?

c) If a 25 mm bore hydraulic cylinder is connected to the pipe, what would the forward stroke speed of the cylinder be?

d) The viscosity of the oil is v = XXXXXXXXXXm2/s. Is the flow in the pipe laminar or turbulent?
Answered Same Day Dec 26, 2021

Solution

David answered on Dec 26 2021
129 Votes
Problems of Fluid Mechanics:
a) A 4 kW motor is driving an oil pump with an efficiency of 95% down a 10 mm diameter pipe. If
the velocity of the fluid down the pipe is 1.8 m/s. Calculate the flow rate that the pump would
deliver.
) What is the pressure that the pump can deliver?
c) If a 25 mm bore hydraulic cylinder is connected to the pipe, what would the forward stroke
speed of the cylinder be?
d) The viscosity of the oil is v = 0.00001 m2/s. Is the flow in the pipe laminar or tu
ulent?
Solution
A) The motor power rating is 4kW
Efficiency of the motor is 95%
Hence the actual power transfe
ed to the fluid = 0.95 * 4 = 3.8kW
Velocity of the fluid down the pipe is 1.8m/s...
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