Abstract:In order to study the influence of airfoil camber on the hydraulic performance of the axialflow pump, the methods of numerical simulation and model test were adopted to do the research. The position and height of the maximum camber of the airfoil were changed to maintain the similar lift coefficient. Based on the parametric airfoil, different airfoils with different airfoil cambers were designed. The corresponding axialflow impellers on the hydraulic characteristics were analyzed. Firstly, the airfoil optimization method was adopted for the maximum camber position of the twodimensional airfoil at 0.3L~0.65L, which ensured that the lift coefficient of the airfoil was basically the same. So the airfoil design schemes with different maximum airfoil degrees were obtained. Secondly, the twodimensional cascade theory was used to design the axial flow pump impeller based on the three designed airfoil schemes of the maximum airfoil camber position of 0.4L, 0.5L and 0.6L. The rest of the design parameters remained unchanged, and the three different axialflow impellers were obtained. The matching guide vane, elbow and impeller were combined into a pump section for numerical simulation calculation. Finally, the reliability of the numerical calculation results was verified by the pump section model test. The research results showed that in order to ensure better energy and cavitation performance of the axialflow pump, the maximum airfoil camber position was preferably selected as 0.4L~0.6L. When the maximum airfoil camber position was 0.5L, the pump had a wide range of highefficiency area, and the flowhead curve was relatively smooth. In the large flow area, as the maximum airfoil camber position was closer to the airfoil trailing edge, the cavitation and the energy performance of the pump would increase. The research had important theoretical significance and guiding significance in the design of axialflow pump and practical engineering application.
