This paper investigates the hydrodynamic characteristic of a single-stage centrifugal pump with inlet inducer and outlet Radial Guided Vanes (RGVs) influenced by the clocking effect for the first time. Different from general ones, the outlet RGVs in this paper have specificities. The hydraulic performance and dynamic characteristics of the centrifugal pump are numerically studied and validated by experiments. The results indicate that there is an optimum position of RGVs that can not only increase the pump head and efficiency but also reduce the pressure fluctuation intensity. A non-dimensional parameter describing the velocity non-uniformity of the impeller outlet is first proposed, which is negatively related to the pump’s hydraulic performance. The clocking position of the RGVs will affect the velocity homogeneity at the impeller outlet, and further influence the hydraulic characteristics of the pump. Besides, the clocking effect of outlet RGVs mainly affects the amplitudes of BPF for both the pressure fluctuation and radial force, and the most obvious frequency of pressure pulsation and radial force is 3 BPF correlating with the inlet inducer. It is recommended to install the volute-tongue tip near the middle of two vanes.

本文首次研究了带有进风口和出风口导叶（RGV）的单级离心泵的水动力特性。与一般的不同，本文的出口RGV具有特殊性。对离心泵的水力性能和动力特性进行了数值研究，并通过实验进行了验证。结果表明，RGV的最佳位置不仅可以增加泵压头和效率，还可以减小压力波动强度。首先提出了描述叶轮出口速度不均匀性的无量纲参数，它与泵的液压性能负相关。RGV的计时位置会影响叶轮出口处的速度均匀性，并进一步影响泵的水力特性。此外，出口RGV的计时效应主要影响压力波动和径向力的BPF幅度，压力脉动和径向力的最明显频率为3 BPF与入口诱导器相关。建议将蜗壳舌尖安装在两个叶片中间附近。