ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-472-4
ISBN Online: 978-1-56700-471-7
3rd Thermal and Fluids Engineering Conference (TFEC)
EFFECTS OF MERIDIONAL SHAPE ON HYDRAULIC AND SUCTION PERFORMANCE OF A HIGH SPECIFIC SPEED CENTRIFUGAL PUMP
Resumo
In the present study, effects of the meridional shape of a centrifugal pump on the hydraulic performance have
been evaluated using three-dimensional Reynolds-averaged Naiver-Stokes analysis. Four geometric parameters
of a centrifugal pump impeller, which are two control points for the meridional curve profiles of the impeller hub
and shroud and inlet radii of the blade hub and shroud, are tested to find the influential factors at design and offdesign
conditions. As the performance parameters, the hydraulic efficiency at the design flow rate, the blockage
at 60% of the design flow rate, and the required NPSH at 130% of the design flow rate, are selected to evaluate
the hydraulic performance and reliability of the centrifugal pump. The present results show that the inlet radius
of the blade hub is the most sensitive factor for the blockage and the required NPSH, among the tested geometric
parameters. And, the inlet radius of the blade shroud shows strong influence on the hydraulic efficiency
compared to the other parameters. On the other hand, all the performance parameters are not affected much even
though the meridional profiles of the impeller hub and shroud are changed.