Abstract: Considering the energy consumption of the HP-pump for SWRO,a reasonable type of high pressure pump was selected,and a new structure of the axial suction segment multistage pump was proposed.Based on the existing effective hydraulic models,through optimizing several key hydraulic dimensions which affect the efficiency,six kinds of impeller models and two kinds of guide vanes were designed,and six groups of hydraulic models were assembled.Performance characteristics of these models were predicted by using the CFD technology.Two groups of high-efficiency hydraulic models were selec-ted to produce two single-stage model pumps for test research.The tests show that the capacity and head meet the requirements of the HP-pump,and the efficiency of the best model pump reaches to 79.72%.
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