Methodology for Aerodynamic Design and Optimization of Axial Rotor Blade Based on the Effects of Sweep and Dihedral (original) (raw)

This work presents a methodology for aerodynamic design of axial flow pump rotors based on initial values established. This methodology proposes a modification next to the blade tip region, in order to minimize the effects caused by the spacing between the blade tip and the casing (tip clearance) in the flow of axial flow rotors. One is the displacement of the blade profiles near to the blade tip region. These displacements are known as sweep and dihedral. An axial flow pump rotor was designed and a certain tip clearance was fixed. This conventional rotor was then modified and applied the sweep and dihedral in the region near to the blade tip. By means of techniques of computational fluid dynamics (CFD), the search for the optimal value of efficiency was made through the CRSA optimizer with Fortran platform that manages the system of mesh generation with the numerical simulation software, FLUENT ®. Based on the optimal values found, a restriction of range of sweep and dihedral was p...