中文摘要：

为研究高速螺旋流在深海采矿水力提升系统中的流动规律，利用Fluent软件，采用欧拉双流体模型。对扬矿管内液固两相流进行三维数值模拟与仿真，获得了扬矿管内不同断面上的速度场、压力场以及锰结核颗粒的体积分布规律．仿真结果表明，高速螺旋流在提升过程中，管心附近出现负压且沿轴向显著增加，并产生强烈的卷吸作用，形成龙卷风效应，抽吸断面上的锰结核颗粒，使之向轴心聚集，从而避免了颗粒与管壁面的碰撞以及颗粒对壁面的磨损，有利于提高扬矿管的使用寿命．

英文摘要：

In order to study the flow regularity of high-speed spiral flow in deep-sea mining hydraulic lifting system, the liquid-solid two-phase flow in lifting pipe was numerically simulated by Eulerian two-fluid model with the Fluent software, and the velocity and pressure fields distributions and the volume distribution of manganese nodules were obtained. The simulation results show that a negative pressure around the pipe center occurred and remarkably increased along the axial. The negative pressure produced strong entrainment function, and formed a tornado effect; it compelled particles to gather at the hub, thus avoiding the collision between particles and the pipe surface. It is helpful to improve the service life of lifting pipe.