Design and optimization of the two-channel centrifugal wastewater pump impeller

Abstract

The efficiency and reliability of pumping systems play a key role in wastewater treatment systems as well as in wastewater disposal systems in general. This paper considers the optimisation of a two-channel centrifugal pump impeller for wastewater applications. The purpose of the study is to increase the hydraulic efficiency of the pump by optimising the geometric parameters of the impeller. The optimisation criterion is increasing the impeller hydraulic efficiency. The original impeller geometry was obtained using CFturbo software. Numerical simulation was carried out in ANSYS CFX. Optimisation of the impeller geometry was performed in the ANSYS optiSLang software package using the Response Surface method. The Evolutionary Algorithm was used as the optimisation algorithm, which allowed an efficient analysis of the design parameter space and finding the optimal solution. As a result of optimisation, an impeller with a hydraulic efficiency of 61.2% was obtained, which exceeds the required hydraulic efficiency of 60% specified in the technical conditions. It should also be noted that the resulting geometry allows wastewater bodies with a diameter of Dp=100 mm to pass through.