This article studies the flow trajectories and the wear law of sediment particles in a pump considering multiple variables, such as sediment concentration, particle size, and cavitation stage. In addition, the mechanism of joint effects of cavitation and sediment wear of the axial-flow pump is explored. In this work, the characteristics of cavitation and sediment wear in an axial-flow pump are investigated by the numerical simulation using shear stress transport k–ω turbulence model with experimental validation. The external characteristics of experimental results and numerical simulations are in agreement. The results show that the sediment concentration exerts a profound influence on the vacuole distribution in the pump, while the particle size has little effect on it. Cavitation can increase the volume fraction of the solid, accelerate the wear on the components, and affect the sediment distribution in the impeller. Cavitation and sediment wear are mutually worsening, and their joint effects will form a vicious circle. With the decrease in inlet pressure and the increase in sediment concentration and particle size, the maximum wear rate will gradually increase, which proves that cavitation, sediment concentration, and particle size are the main factors that influence the maximum wear rate.

本文研究了考虑多个变量（例如泥沙浓度，粒径和气蚀阶段）的泵中泥沙颗粒的流动轨迹和磨损规律。此外，还研究了轴流泵的气蚀和沉积物磨损的共同作用机理。在这项工作中，通过使用剪切应力传递k–ω的数值模拟研究了轴流泵中的气蚀和沉积物磨损的特性。实验验证的湍流模型。实验结果和数值模拟的外部特征是一致的。结果表明，沉积物浓度对泵中液泡的分布影响很大，而粒径对其影响不大。空化会增加固体的体积分数，加速组件的磨损，并影响叶轮中的沉积物分布。空化和沉积物的磨损正在相互恶化，它们的共同作用将形成一个恶性循环。随着入口压力的降低以及沉积物浓度和粒径的增加，最大磨损率将逐渐增加，这证明空化，沉积物浓度和粒径是影响最大磨损率的主要因素。