Abstract
In order to reduce pressure pulsation of vortex pumps, the mantis shrimp was chosen as biological prototype and a bionic engineering model was developed from its abdominal segment grooves. Bionic mantis shrimp groove volute vortex pump models with different numbers of grooves were developed, and numerical simulation methods were used to calculate the models to study the effects of the volute grooves on the pressure pulsation of a vortex pump. The results show that a bionic groove volute could effectively improve the pressure pulsation of a vortex pump outlet, and reduce the pressure pulsation around the pump’s tongue and other internal points. The pressure pulsation under different conditions is impacted by shaft frequency and blade frequency. The bionic groove structure has little effect on the external characteristics of the pump, but could improve the static pressure, velocity distribution, and vortex structure of the flow field. Additionally, pressure pulsation of the whole vortex pump is reduced.
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