In order to investigate the influence of adjustable inlet guide vanes on the hydraulic performance of axial-flow pump and impeller, the axial-flow pump with different inlet guide vane adjustable angles was simulated based on the RNG k-ε turbulent model and Reynolds time-averaged equations. The multivariate non-linear regression prediction model was established about the effect of adjustable inlet guide vane on the hydraulic performance of axial-flow pump based on the numerical simulation. The performance curves of axial-flow pump with different inlet guide vane adjustable angles were obtained by calculation, showing that the performance curve shifts towards larger flow volume in case the guide vanes are turned from positive to negative angle. With the increase of inlet guide vane positive angle, the optimum operating of pump is closer to smaller operating condition, but the hydraulic efficiency of pump is lower. The larger the flow is, the larger the decreasing amplitude of pump efficiency is. With the decreases of inlet guide vane negative angle, the higher hydraulic efficiency of pump increases first then decreases. The inlet guide vane angle affects the axial velocity distribution of the blade trailing edge.

为了研究可调进口导叶对轴流泵和叶轮水力性能的影响，基于RNGk-ε湍流模型和雷诺时间模型，模拟了不同进口导叶可调节角度的轴流泵。平均方程。基于数值模拟，建立了可调进口导叶对轴流泵水力性能影响的多元非线性回归预测模型。通过计算得出了不同进口导叶可调角度的轴流泵的性能曲线，表明当导叶从正角转为负角时，性能曲线向较大流量方向移动。随着进口导流叶片正角的增加，泵的最佳运行接近于较小的运行条件，但泵的液压效率较低。流量越大，泵效率的下降幅度越大。随着入口导流叶片负角的减小，较高的泵液压效率先增大，然后减小。入口导叶角度会影响叶片后缘的轴向速度分布。