Abstract：In order to study the influence of clocking location of the guide vane on the hydraulic performance and operational stability of the centrifugal pump, the SST k-ω turbulence model is used to analyze the unsteady flow inside the centrifugal pump when the guide vane was located at different clocking locations. The focus is the influence of the clocking location of the guide vane on the impeller′s work. The results showed that the work of the impeller blade fluctuates periodically due to the rotor-stator interaction at the same clocking position of the guide vane. At different clocking location of the guide vanes, the peak and trough times of the work performed by the impeller blades are different, and there is an obvious phase difference. It shows that the influence factors of the clocking effect on the work of the impeller blade are mainly the impeller-guide vane rotor-stator interaction, and the impeller-volute rotor-stator interaction, and the asymmetric geometry of volute. At different clocking locations of the guide vanes, the work done by the impeller flow passage shows periodic fluctuations and a phase difference. At the same time, due to the influence of the impeller-guide vane rotor-stator interaction, the pressure field distribution in the impeller outlet area is different. It also shows that the influence of impeller-guide vane rotor-stator interaction is the main factor of the influence of the cloc-king effect of the guide vane on the work by the impeller passage.
