涡激振动对管道液固两相流流场的影响

Influence of Vortex Induced Vibration on the Liquid-Solid Two-Phase Flow in Pipeline

采用以颗粒动力学为基础的Euler-Euler双流体模型和计算流体动力学(CFD)技术模拟涡激振动下的管道内部液固两相流流动,研究了涡激振动对深海采矿矿物颗粒水利提升的影响.通过对3种涡激振动工况下液固两相流流场计算分析,发现管道的涡激振动会改变颗粒轴向速度分布和颗粒浓度分布.在涡激振动作用下颗粒轴向速度分布发生"波动"现象,颗粒浓度分布发生周期性的变化,局部浓度明显提高.

In order to study the influence of vortex-induced vibration（VIV） on mineral particles hydraulic transportation in the deep-sea mining, Euler-Euler two-fluid flow model based on particle dynamics and CFD are employed to simulate the liquid-solid two-phase flow field in pipe under VIV. Through the analy- sis of liquid-solid two-phase flow field under several VIV conditions, it is found that VIV changes the axial velocity and concentration distribution of particle. The fluctuation phenomenon of the particle axial veloci- ty occurs, the particle concentration distribution varies cyclical and local concentration increase significantly.