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<p>When a centrifugal pump transports solid–liquid two-phase flow, its performance decreases, and the two-phase flow characteristics within the pump is directly related to the blade’s geometry. Therefore, in this study, the coupled computational fluid dynamics discrete element method (CFD-DEM) was used to analyze a prototype impeller with a wrap angle of 94°. The inverse design method was then used to develop impeller designs with different wrap angles (99°, 104°, and 109°). It was found that as the blade wrap angle increased, particle accumulation in the blade inlet region was alleviated, and the severe wear region moved toward the impeller outlet. These effects were related to the decreased energy losses of the moving particles at the inlet and increased at the outlet. Overall, there was a decreasing trend in the energy gained by the particles on the pressure surface.</p>

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Influence of wrap angle on solid phase motion characteristics in a solid–liquid two-phase flow centrifugal pump

  • 期刊论文

  • 发表日期：

    2025年5月23日

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  • Yi Li,
  • Zedong Zhang,
  • Yanjun Jin,
  • Xiangyun Zhao

摘要

When a centrifugal pump transports solid–liquid two-phase flow, its performance decreases, and the two-phase flow characteristics within the pump is directly related to the blade’s geometry. Therefore, in this study, the coupled computational fluid dynamics discrete element method (CFD-DEM) was used to analyze a prototype impeller with a wrap angle of 94°. The inverse design method was then used to develop impeller designs with different wrap angles (99°, 104°, and 109°). It was found that as the blade wrap angle increased, particle accumulation in the blade inlet region was alleviated, and the severe wear region moved toward the impeller outlet. These effects were related to the decreased energy losses of the moving particles at the inlet and increased at the outlet. Overall, there was a decreasing trend in the energy gained by the particles on the pressure surface.