Structural Analysis
Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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The system in Fig 2 pumps water from a lower reservoir to a higher reservoir. The
pipe diameter is 0.255 m and the pipe lengths are L1= 3.5 m, L2= 4 m, L3= 5 m,
and L4= 0.4 m. The impeller of the centrifugal pump has a diameter of 0.4 m and
operates at 950 rpm. The uniform blade height is 58 mm. The water enters the
pump parallel to the pump shaft with a flow rate of 0.135 m³/s. Take viscosity as
0.00112 N s/m².
Tank 1
L1
Pump
L2
L3
L4
Regular
threaded
elbows
Tank 2
Fig Q2: Piping system to pump water between two tanks.
Work to 4 significant digits. Enter all values using base units or their combinations,
i.e. m, m/s, Pa, N. Do not use multiples as e.g. mm, kPa.
You can use values with exponents, such as 0.12e3.
expand button
Transcribed Image Text:The system in Fig 2 pumps water from a lower reservoir to a higher reservoir. The pipe diameter is 0.255 m and the pipe lengths are L1= 3.5 m, L2= 4 m, L3= 5 m, and L4= 0.4 m. The impeller of the centrifugal pump has a diameter of 0.4 m and operates at 950 rpm. The uniform blade height is 58 mm. The water enters the pump parallel to the pump shaft with a flow rate of 0.135 m³/s. Take viscosity as 0.00112 N s/m². Tank 1 L1 Pump L2 L3 L4 Regular threaded elbows Tank 2 Fig Q2: Piping system to pump water between two tanks. Work to 4 significant digits. Enter all values using base units or their combinations, i.e. m, m/s, Pa, N. Do not use multiples as e.g. mm, kPa. You can use values with exponents, such as 0.12e3.
What would be the shaft power required to turn the impeller if the exit blade
angle is 48 degrees.
The value of the shaft power is
b)
Find the major losses in the system. Take the pipe Darcy friction factor as 0.05.
The value of the major losses is
c)
Find the minor losses in the system considering the 90 degrees elbows' losses
and the exit/entrance losses of the tanks. Consider that the exit of tank 1 is
sharp-edged and take the loss coeffcient of the entrance of tank 2 as 1.
expand button
Transcribed Image Text:What would be the shaft power required to turn the impeller if the exit blade angle is 48 degrees. The value of the shaft power is b) Find the major losses in the system. Take the pipe Darcy friction factor as 0.05. The value of the major losses is c) Find the minor losses in the system considering the 90 degrees elbows' losses and the exit/entrance losses of the tanks. Consider that the exit of tank 1 is sharp-edged and take the loss coeffcient of the entrance of tank 2 as 1.
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