A pump impeller rotating at 1400 rpm has an outside radius of 21 cm, the vane outlet angle B2 is 158* and the radial velocity at the outlet Cr2 is 4 m/s. Assuming radial flow at inlet, draw the theoretical outlet velocity diagram and calculate the various velocities and angles. What is the theoretical head Ho, in meters, assuming that the circulatory flow coefficient no = 1. 91.84 65.60 46.86 128.58 180.01 calculate the water horsepower. O 52.4 O 22.1 78.9 16.8 34.8

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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A pump impeller rotating at 1400 rpm has an outside radius of 21 cm, the vane outlet angle B2 is 158* and
the radial velocity at the outlet Cr2 is 4 m/s. Assuming radial flow at inlet, draw the theoretical outlet
velocity diagram and calculate the various velocities and angles.
What is the theoretical head Ho, in meters, assuming that the
circulatory flow coefficient n = 1.
91.84
65.60
46.86
128.58
180.01
calculate the water horsepower.
52.4
22.1
78.9
16.8
34.8
Transcribed Image Text:A pump impeller rotating at 1400 rpm has an outside radius of 21 cm, the vane outlet angle B2 is 158* and the radial velocity at the outlet Cr2 is 4 m/s. Assuming radial flow at inlet, draw the theoretical outlet velocity diagram and calculate the various velocities and angles. What is the theoretical head Ho, in meters, assuming that the circulatory flow coefficient n = 1. 91.84 65.60 46.86 128.58 180.01 calculate the water horsepower. 52.4 22.1 78.9 16.8 34.8
In the preceding example; assume a deviation of 10° applied to B2 due
to circulation after the modern theory. The flow is 30 lit/s. After
drawing/illustrating the velocity diagram, find the theoretical head Ho, in
meters, assuming radial flow at inlet, neglecting the deviation in inlet
velocity diagram.
52.4
16.8
78.9
O 22.1
34.8
Assuming that the mechanical efficiency nmech = 0.95, the hydraulic
(or manometric) efficiency nman = 0.8, find the required break
horsepower to drive the pump.
22.1
34.8
16.8
78.9
52.4
Transcribed Image Text:In the preceding example; assume a deviation of 10° applied to B2 due to circulation after the modern theory. The flow is 30 lit/s. After drawing/illustrating the velocity diagram, find the theoretical head Ho, in meters, assuming radial flow at inlet, neglecting the deviation in inlet velocity diagram. 52.4 16.8 78.9 O 22.1 34.8 Assuming that the mechanical efficiency nmech = 0.95, the hydraulic (or manometric) efficiency nman = 0.8, find the required break horsepower to drive the pump. 22.1 34.8 16.8 78.9 52.4
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