CFD Analysis on the Effects of the Blade Design Method to the Centrifugal Pump Performance

Kyparissis, Spyridon D.; Margaris, Dionissios P.; Panagiotopoulos, Elias E.; Filios, Andronikos E.
September 2009
International Review of Mechanical Engineering;Sep2009, Vol. 3 Issue 5, p553
Academic Journal
The great progress in computational fluid dynamics has sufficiently contributed to the prediction of the flowfield through pumps and the enhancement of their design. In the present analysis the influence of blade design methods based on angle and velocity distribution is studied in the flowfield and in the efficiency of a centrifugal pump. The results are compared with the corresponding of the synthetic double-arc blade design method for the same centrifugal pump geometry. The one-dimensional Pfleiderer's approach based on empirical analytical equations is applied for the main geometrical characteristics of the pump impeller. The numerical solution of the discretized three-dimensional, incompressible Navier-Stokes equations over an unstructured grid is accomplished with a commercial CFD finite-volume code. The characteristic performance curves are resulted through the calculation of the internal flow field. For every blade design method the pressure distribution inside the pump and around the impeller periphery is computed. The velocity field between the blades at the leading edge is examined.


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