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<p>To investigate the effect of particle concentration on the computational performance and wear of a centrifugal pump, the Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) was employed to model the two-phase flow within the pump. The interaction between solid particles and the flow components of the centrifugal pump was analyzed by monitoring the wear rate of these components and the movement of particles. The results demonstrate that particle impact on the pressure surface of the centrifugal pump occurs as a small-angle cutting impact. The cumulative force exerted by particles on the volute, in both the normal and tangential directions, is primarily concentrated in the middle region of the volute wall and at the tongue. The main wear on the impeller is concentrated on the pressure surface of the blade. As the proportion of small particles increases, the wear area on the impeller expands, and the wear of the blade shows a trend of enlargement. The wear rate on the pressure surface of the blade exhibits periodic oscillations. The work provides a theoretical basis and practical guidance for the wear-resistant design and structural optimization of centrifugal pumps operating under solid-liquid two-phase flow conditions.</p>

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The Effect of Mixed Particle Gradation on the Internal Flow and Wear Performance of Centrifugal Pumps

  • 期刊论文

  • 发表日期：

    2026年6月24日

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  • Yanping Wang,
  • Han Zhou,
  • Yehang Zu,
  • Xiaofeng Deng,
  • Nan Shi

摘要

To investigate the effect of particle concentration on the computational performance and wear of a centrifugal pump, the Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) was employed to model the two-phase flow within the pump. The interaction between solid particles and the flow components of the centrifugal pump was analyzed by monitoring the wear rate of these components and the movement of particles. The results demonstrate that particle impact on the pressure surface of the centrifugal pump occurs as a small-angle cutting impact. The cumulative force exerted by particles on the volute, in both the normal and tangential directions, is primarily concentrated in the middle region of the volute wall and at the tongue. The main wear on the impeller is concentrated on the pressure surface of the blade. As the proportion of small particles increases, the wear area on the impeller expands, and the wear of the blade shows a trend of enlargement. The wear rate on the pressure surface of the blade exhibits periodic oscillations. The work provides a theoretical basis and practical guidance for the wear-resistant design and structural optimization of centrifugal pumps operating under solid-liquid two-phase flow conditions.