Research of Bubble Motion in the Centrifugal Pump based on Coherent Structure
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Abstract:
The bubble motion in the centrifugal pump was investigated based on the coherent structure in the near-wall region. First, the Morrison equation of bubble was used to determine the normal velocity in the near-wall region. Then, the flow velocity of bubble was obtained based on the coherent structure under the “sweep” conditions. Finally, the shock angle of bubble in the centrifugal pump with coherent structure on the impeller wall was obtained based on the above two velocities. . The results showed that the “sweep” effects of coherent structure in the near-wall region of the centrifugal pump can cause the small-angle shock failure from the sand to the impeller wall, which was in coincidence with the previous research results.