机械科学与技术2017，Vol.36Issue(11)：1708-1714,7.DOI:10.13433/j.cnki.1003-8728.2017.1112
深海采矿两级离心泵固液两相流数值模拟研究
Numerical Simulation of Solid-liquid Two-phase Flow of Two-stage Slurry Pump for Deep-sea Mining
摘要
Abstract
In view of the fact that a centrifugal pump for land use can not meet the requirements of 1 000 m deep-sea mining,a high-performance two-stage type slurry pump was designed.The impeller and the space guidance vane were selected.The inner turbtdent flow of the two-stage pump was simulated with the three-dimensional Reynolds-average N-S equations and the RNG κ-ε turbulence model.The distribution law of solid-liquid two-phase flow was analyzed and the performance of the slurry pump was predicted with the SIMPLEC algorithm.The simulation results show that under different flow conditions,the pressure on the pressure surface of the impeller blade on the same cylinder radius is greater than that on the suction surface.When the flow is greater,the impeller entrance velocity is smaller,and the influence of the impeller on solid and fluid acceleration is weaker;the outlet velocity in the impeller is small.Then the outlet and inlet fluid velocity differences are smaller in the space guidance vane,producing a worse rotational effect and a smaller head,and the performance of the equipment is reduced.Efficiency increases with the increase of flow rate,so the work flow should be selected 500 m3/h～600 m3/h.关键词
矿浆泵/空化/固液两相流/数值模拟/叶轮/压力Key words
centrifugal pump/pressure/solid-liquid two-phase flow/numerical analysis/turbulence/algorithms分类
机械制造引用本文复制引用
丁小兵..深海采矿两级离心泵固液两相流数值模拟研究[J].机械科学与技术,2017,36(11):1708-1714,7.基金项目
国家自然科学基金项目(51375498)资助 （51375498）
