旋转水力提升多金属结核运动特性数值模拟  

Numerical Simulation of Characteristics of Motion for Polymetallic Nodulesin Swirling Flow During Hydraulic Lifting

作　　者：陈云[1,2] 杜燕连 李萌 梁栋[1,2] 沈义俊[1,2] CHEN Yun;DU Yanlian;LI Meng;LIANG Dong;SHEN Yijun(State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan University,Haikou 570228,Hainan,China;College of Mechanical and Electrical Engineering,Hainan University,Haikou 570228,Hainan,China;College of Information and Communication Engineering,Hainan University,Haikou 570228,Hainan,China)

机构地区：[1]海南大学南海海洋资源利用国家重点实验室,海南海口570228 [2]海南大学机电工程学院,海南海口570228 [3]海南大学信息与通信工程学院,海南海口570228

出　　处：《矿冶工程》2024年第2期13-17,共5页Mining and Metallurgical Engineering

基　　金：海南省重大科技计划(ZDKJ2021027);海南省重点研发计划(ZDYF2020207);三亚崖州湾深海科技城科研项目(SKJC-2020-01-016)。

摘　　要：采用CFD-DEM耦合方法对多金属结核提升进行模拟,研究了垂直管道中不同旋转流场旋流比对水力提升多金属结核输运特性的影响。结果表明,随着旋转流场旋流比增大,旋转强度显著增强,流体流速最大值增大,颗粒群轴向平均速度增大。旋转流场的旋转强度明显影响管道内颗粒的速度分布:速度大的颗粒逐步分布在管壁周围,速度较小的颗粒分布在管道中心处。旋转流场可降低颗粒群局部浓度,有利于降低因颗粒滞留效应引起局部浓度升高造成的输送管堵塞风险。The lifting of polymetallic nodules was simulated by using a CFD⁃DEM coupling approach,and the influence of different swirling flow on hydraulic lifting of polymetallic nodules in vertical pipelines was explored.The results show that as swirl ratio increases,the intensity of swirl will be enhanced significantly,and both the maximum fluid velocity and the average axial velocity of particle group will increase.It is found that intensity of swirl can bring obvious impact to the distribution of particles with different velocity in the pipe,showing that particles with high velocity are gradually distributed around the pipe wall,while the particles with low velocity in the center of the pipe.Swirling flow can reduce the local concentration of particles,which is beneficial to reducing the risk of pipeline blockage due to higher concentration of particles caused by retention effect.

关 键 词：深海采矿 多金属结核 液固双相流 水力提升 管道输送 旋流比 CFD-DEM耦合 

分 类 号：TD857[矿业工程—金属矿开采]