Design of mixed ow pump impeller blade using mean streamline theory and its analysis

Abstract

Given the importance of blade design in the effective performance of a mixed ow pump, the present work demonstrates the designing of the mixed ow pump impeller blade using the almost unexplored mean streamline theory. The mean streamline theory, though used sparingly, was found suitable to give comparable results to those of other templates of design. The design process was carried out in AutoCAD 2013 and Solid Works Premium 2014 software. The analysis of equivalent stress, equivalent elastic strain, Total deformation, and the directional deformation was carried out in ANSYS 2014 for di erent construction materials of the blade, i.e., stainless steel, titanium alloy, bronze, and copper alloy. Total deformation was found to be maximum for the impeller blade made from titanium alloy, whereas the equivalent stress and strain was found to be the least for the titanium alloyed impeller blade. Further, a comparison analysis of the equivalent stresses in blade designed was carried out using mean streamline theory and free vortex theory. It was observed that the equivalent stress in impeller blade designed using free vortex theory was lower than that designed using mean streamline theory.