Numerical simulation and model test of the influence of guide vane angle on the performance of axial flow pump

Abstract

The axial flow pump is a low-head pump widely used in farmland irrigation and water transfer engineering in plain areas. To study the effects of different guide vane rotation angles and inlet angles on the performance of axial flow pumps, based on the initial scheme of the guide vane, the efficiency of the axial flow pump is expected to be improved by adjusting the guide vane rotation angles and changing the inlet angles of the guide vane. This paper uses Computational Fluid Dynamics numerically to simulate and calculate the performance of axial flow pumps under different guide vane rotation angles and inlet angles. The results show that the influence of different guide vane rotation angles and inlet angles on the performance of the axial flow pump is reflected in the operating conditions of large-discharge conditions. Adjusting different guide vane rotation angles can significantly improve the efficiency of axial flow pumps. Moreover, the high-efficiency area of the axial flow pump is expanded nearly two times with the increase in the guide vane rotation angles under large-discharge conditions. At the same time, under the design condition, the highest efficiency of the axial flow pump is 87.69% under scheme V. However, under the linear change of the inlet angle of the guide vane, the highest efficiency of the axial flow pump can reach 87.71%. Finally, the model test verifies the reliability of the numerical simulation, and the research results are beneficial for improving the efficiency of the axial flow pump.