Blade Exit Angle Impact on Turbulent Fluid Flow and Performance of Centrifugal Pump Using CFD
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Date
2015
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Abstract
Rotor is a working part that adds energy to the fluid;
its geometry plays a fundamental role in the centrifugal pump
performance. Any change in the rotor geometry would have an
effect on the impeller inlet or exit velocity triangles, which may
cause a significant performance change. Hence the blade exit
angle have very important role in the performance of the
centrifugal pump. In this paper three impeller designs that differ
in their outlet blade angles, with the casing and other geometric
parameters keep constant, are considered to investigate its effect
on the flow parameters and turbulence intensity as well as on the
performance of the centrifugal pump. For this purpose, a threedimensional flow is simulated solving Reynolds averaged Navier
Stokes (RANS) equations by using FLUENT code. Standard k-ε
model is used for the turbulent closure of steady incompressible
flow. The CFD analysis shows that the blade exit angle has
influence on the head and efficiency. Rise in head and hydraulic
efficiency have been observed with increasing blade exit angle.
The research results are helpful for energy efficiency and
hydraulic design of centrifugal pump.