5) Determine the minimum number of blades required for the slip to not exceed 0,9. 6) Determine the static pressure difference (P2-P1) through the impeller by using Bernoulli equation. 7) Determine the available NPSH if the pump is placed 2m above the free surface of the tank and the vapor pressure is Pv = 2.43 Kpa.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Problem 2:
A centrifugal pump with an overall efficiency of 0.56 rotates at 1650 rpm. The flow is purely radial
at the inlet of the rotor. The pump has the following characteristics:
Flow rate
Inlet diameter
Outlet diameter
Head
Width at the inlet
Width at the outlet
Leakage
Mechanical loss
Blade angle at the outlet
The water density
Atmospheric pressure
|Q=72 L/s
DI = 90 mm
D2 = 280 mm
H= 25m
bl -20 mm
b2 = 18 mm
q =2 L/s
Pm = 1.41 kW
B2 = 35
p = 998 kg/m³
101 kPa
Transcribed Image Text:Problem 2: A centrifugal pump with an overall efficiency of 0.56 rotates at 1650 rpm. The flow is purely radial at the inlet of the rotor. The pump has the following characteristics: Flow rate Inlet diameter Outlet diameter Head Width at the inlet Width at the outlet Leakage Mechanical loss Blade angle at the outlet The water density Atmospheric pressure |Q=72 L/s DI = 90 mm D2 = 280 mm H= 25m bl -20 mm b2 = 18 mm q =2 L/s Pm = 1.41 kW B2 = 35 p = 998 kg/m³ 101 kPa
5) Determine the minimum number of blades required for the slip to not exceed 0.9.
6) Determine the static pressure difference (P:-P1) through the impeller by using Bernoulli
equation.
7) Determine the available NPSH if the pump is placed 2m above the free surface of the tank
and the vapor pressure is Pv = 2.43 Kpa.
Transcribed Image Text:5) Determine the minimum number of blades required for the slip to not exceed 0.9. 6) Determine the static pressure difference (P:-P1) through the impeller by using Bernoulli equation. 7) Determine the available NPSH if the pump is placed 2m above the free surface of the tank and the vapor pressure is Pv = 2.43 Kpa.
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