颗粒体积分数对深海采矿提升泵工作性能影响分析
发布时间：2018-12-17 20:32
【摘要】：为研究颗粒体积分数对深海采矿提升泵工作性能影响,采用RNGκ-ε湍流模型与Hinze-Tchen颗粒湍流粘性系数模型,对提升泵内固液两相流进行数值模拟,比较不同的颗粒体积分数对提升泵内压力、颗粒浓度分布的影响,进而分析颗粒体积分数对扬程、效率等工作性能的影响,为提升泵的优化设计提供理论依据。研究结果表明:随着颗粒体积分数的增加,泵内浆体总压逐渐下降,扬程随之减小,叶片与导叶表面上平均颗粒浓度均有一定幅度的上升,颗粒与叶片、导叶表面之间以及颗粒间的碰撞几率增大,流体运动趋向更加复杂,流动更加絮乱,因而加大水力损失,降低泵的效率。实验表明数值模拟与实验结果基本吻合,证实了数值模拟方法的可行性及准确性。
[Abstract]:In order to study the effect of particle volume fraction on the performance of deep-sea mining lifting pump, the RNG 魏-蔚 turbulence model and the Hinze-Tchen particle turbulence viscosity model were used to simulate the solid-liquid two-phase flow in the lifting pump. The effects of different particle volume fraction on the pressure and particle concentration distribution in the lifting pump were compared, and the effects of particle volume fraction on the lift and efficiency were analyzed, which provided the theoretical basis for the optimization design of the lifting pump. The results show that with the increase of particle volume fraction, the total pressure of the slurry decreases gradually, the lift decreases, and the average particle concentration on the surface of the blade and the guide vane increases to a certain extent. The collision probability between the surfaces of the guide vane and the particles increases, the fluid movement tends to be more complex and the flow is more chaotic, so the hydraulic loss is increased and the efficiency of the pump is reduced. The experimental results show that the numerical simulation is in good agreement with the experimental results, and the feasibility and accuracy of the numerical simulation method are verified.
【作者单位】： 中南大学机电工程学院;中南大学高性能复杂制造国家重点实验室;
【基金】：国家自然科学基金(51375498) 教育部博士点基金资助项目(20130162110004)
【分类号】：TD50
本文编号：2384761
[Abstract]:In order to study the effect of particle volume fraction on the performance of deep-sea mining lifting pump, the RNG 魏-蔚 turbulence model and the Hinze-Tchen particle turbulence viscosity model were used to simulate the solid-liquid two-phase flow in the lifting pump. The effects of different particle volume fraction on the pressure and particle concentration distribution in the lifting pump were compared, and the effects of particle volume fraction on the lift and efficiency were analyzed, which provided the theoretical basis for the optimization design of the lifting pump. The results show that with the increase of particle volume fraction, the total pressure of the slurry decreases gradually, the lift decreases, and the average particle concentration on the surface of the blade and the guide vane increases to a certain extent. The collision probability between the surfaces of the guide vane and the particles increases, the fluid movement tends to be more complex and the flow is more chaotic, so the hydraulic loss is increased and the efficiency of the pump is reduced. The experimental results show that the numerical simulation is in good agreement with the experimental results, and the feasibility and accuracy of the numerical simulation method are verified.
【作者单位】： 中南大学机电工程学院;中南大学高性能复杂制造国家重点实验室;
【基金】：国家自然科学基金(51375498) 教育部博士点基金资助项目(20130162110004)
【分类号】：TD50
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