Analysis of parameters affecting axial load in end suction centrifugal pump by CFD method

Centrifugal type pumps are widely used in industrial applications. The design and manufacturing processes of pumps are long and costly. In order to shorten these processes and to provide economic benefits, preliminary results are obtained by using computer aided programs. In addition, designing and preparing the pumps that have been examined in the field of computer-aided design and application are considerably economical in terms of R & D costs. The Blade Gen module is used in the ANSYS program for the design of the centrifugal pump of the mentioned type. In this study, parameters affecting axial load for a single suction, closed impeller centrifugal pump were investigated by using the Computational Fluid Dynamics (CFD) method. In this context, the flow rate and the physical properties of the pumps were investigated to determine how much back of impeller's cavity, wear ring and balancing holes affected the axial load. The results show that the wear ring and balancing holes give rise to effective results on the axial load, while back of impeller's cavity the does not affect the large extent. When the change in the axial load due to the change in flow is observed, the working point of the pump has changed. The assumed flow rate at the initial value provided higher efficiency performance at another flow rate.As a result of the design changes in the impeller and snail to reduce the axial load. The working point of the pump was accepted at this flow rate and the analysis of the other parameters affecting the axial load was continued. As a result, in this study aimed at decreasing the axial load, a pump design for the flow rate, heading height, number of revolutions and impeller diameter has been proposed.