5-1 #5-75 1. A centrifugal pump/is being tested in a laboratory. The inside and outside radii of the impellers are_7.5 cm and(15.0 cm, respectively. The width of the impeller vanes (or flow opening height) varies from 5.0 cm at intake to 3.0 cm at outflow. The measured flow rate is 55 liters/sec. The water entry to the impeller is shockless (a = 90°), vane angle at inlet is 150° and exit flow angle is 22.4°. (a) Draw the velocity triangles at inlet and outlet clearly indicating all the velocities and angles. (b) What is the pump speed (in rpm)? (c) What is the power input to the pump (in kW)? [3] [4] [3]

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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5-1
#5-75
1.
A centrifugal pump/is being tested in a laboratory. The inside and outside radii of the
impellers are 7.5 cm and 15.0 cm, respectively. The width of the impeller vanes (or flow
opening height) varies from 5.0 cm at intake to 3.0 cm at outflow. The measured flow
rate is 55 liters/sec. The water entry to the impeller is shockless (a = 90°), vane angle at
inlet is 150° and exit flow angle is 22.4°.
(a) Draw the velocity triangles at inlet and outlet clearly indicating all the velocities and
angles.
(b) What is the pump speed (in rpm)?
(c) What is the power input to the pump (in kW)?
[3]
[4]
[3]
Transcribed Image Text:5-1 #5-75 1. A centrifugal pump/is being tested in a laboratory. The inside and outside radii of the impellers are 7.5 cm and 15.0 cm, respectively. The width of the impeller vanes (or flow opening height) varies from 5.0 cm at intake to 3.0 cm at outflow. The measured flow rate is 55 liters/sec. The water entry to the impeller is shockless (a = 90°), vane angle at inlet is 150° and exit flow angle is 22.4°. (a) Draw the velocity triangles at inlet and outlet clearly indicating all the velocities and angles. (b) What is the pump speed (in rpm)? (c) What is the power input to the pump (in kW)? [3] [4] [3]
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