Centrifugal pump design and analysis

• At first I prepared a model of centrifugal pump with random dimensions.
• There are 6 vanes in the pump.
• For the Flow simulation, moving reference method is used & the volume around the vanes is given angular velocity of 1000 rad/s in clockwise direction
• Boundary Conditions are as follows:-

Inlet Boundary Condition

Atmoshpheric Pressure

101325 Pa

Outlet Boundary Condition

Outlet Velocity

10 m/s

• Number Of Iterations are=700

• Results Of Paramteric Study

	Design Point 1	Design Point 2	Design Point 3	Design Point 4	Design Point 5
Velocity normal to face (Outlet Velocity 1) [m/s]	10	15	20	25	30
SG Av Total Pressure 1 [Pa]	1200657.68	1836805.587	735977.1723	995994.6128	507948.8129
SG Mass Flow Rate 1 [kg/s]	-0.443914859	-0.664423617	-0.887430155	-1.100701987	-1.332325356

***negative sign shows that mass is leaving the boundry.

Outlet Velocity	Pressure Ratio	Mass Flow Rate
10 m/s	11.84957	0.443915 Kg/s
15 m/s	18.12786	0.664424 Kg/s
20 m/s	7.26353	0.88743 Kg/s
25 m/s	9.829703	1.100702 Kg/s
30 m/s	5.013065	1.332325 Kg/s

Performance Curve

• A pump performance curve indicates how a pump will perform in regards to pressure head and flow

• Conclusion

Generally the performance curve is parabolic in nature,but due to random dimensions and improper vane design the performance curve shows peak & valleys.

With the increase in inlet velocity the mass flow rate increases.