Modification of Centrifugal Pump Performance Through Impeller Trimming

Abstract

For reasons of operating costs, the pump performance curve is adjusted to meet the pumping system. One of these modifications is impeller trimming. Impeller trimming is decreasing the impeller diameter in order to modify the best efficiency point (BEP) on the performance curve of the pump to meet the pumping system for saving energy. The centrifugal pumps was tested at impeller standard diameter and with trimming 2%, 5% and this pump was modeled using (CF turbo) program and predict to performance of the pump using the Computational Fluid Dynamics (CFD) and Verification the numerical results with the experimental results. The results were encouraging to apply the same method on the large centrifugal pump, which it was tested at standard impeller diameter and this large centrifugal pump has been simulated at impeller trimming 2%, 5% and 7%.