Abstract: Aiming at the problems that the internal flow field of the guide vane centrifugal pump is unstable, the structure of shark fin was properly abstracted by using bionics technology and principle,and applied to the leading edge of guide vane centrifugal pump impeller blade.The unsteady flow field of guide vane centrifugal pump was calculated, the flow characteristics under three typical working conditions of the flow field in centrifugal pump were studied, and the variation characteristics of radial force of impeller and guide vane were also obtained. The turbulent kinetic energy distribution law of waste heat removal pump was analyzed, and the experimental verification was also carried out. The results indicate that compared with the original model, the bionic shark fin blade can not only improve the flow characteristics in the pump, but reduce the turbulent kinetic energy in the pump. Meanwhile, it can reduce the radial force of impeller and guide vane, and weaken the dynamic and static interference between impeller and guide vane. The bionic shark fin blade can slow down the internal flow disorder of the guide vane centrifugal pump. Besides, the external characteristic parameters such as head and efficiency are obviously improved.
Key words: bionic shark fin; guided vane centrifugal pump; unsteady flow; radial force; internal flow field