深海采矿输送泵内大颗粒滑移与流场耦合作用研究

深海固体矿产资源提升过程中所要输送的矿物颗粒尺度差异较大，泵内颗粒运动与普通固液两相流相比有着截然不同的宏观性质和微观机理，但目前国内外针对上述问题缺乏系统的理论研究，导致混输泵水力设计不能兼顾输送安全性和经济性。为此，本项目针对深海固体矿产资源泵内大颗粒滑移和流场耦合问题，围绕颗粒-流体-壁面耦合作用和颗粒壁面冲击作用两个关键问题，通过数理分析、数值计算和试验，开展泵内固液模型构建、全流场颗粒动力学分析以及泵的内外特性关联研究，揭示复杂流道内颗粒的迁移对流，颗粒运动与流场之间的耦合关系，掌握颗粒群的动态生成和能量传递机理，明确工况参数、固相参数与泵输送性能之间的影响，为高性能深海固体矿产资源输送泵的设计开发提供理论及方法支撑。

This project carried out basic research on the solid-liquid transport characteristics and particle wall impact in the mineral transport pump in the deep-sea environment. The size of the mineral particles is quite different during the deep-sea mining transporting. Compared with conventional solid-liquid two-phase flow, the he particle motion in the slurry pump has completely different macroscopic properties and microscopic mechanisms. However, there is no systematic theoretical research on the different conveying characteristics of particles in domestic and overseas, which results in that the hydraulic design of the multiphase pump cannot take into account the transportation safety and economy. Therefore, this project around two key issues of the particle-fluid-wall coupling and particles impact the wall to solve the issue of large particle slippage and flow field coupling in the deep-sea mining pump. Using the methods of mathematical analysis, numerical calculation and experiment to build the Solid-liquid model in the slurry pump and to analyze the dynamics of particles in the whole flow field and the correlation between flow field characteristics and performance. Revealing the convection laws of particle migration in complex flow channels and the coupling relationship between particle motion and the flow field is conducive to grasp the dynamic generation and decomposition mechanism of particle groups. Determine the influence of working conditions and particle properties on performance will be provided theory and method support for the design and development of high-performance deep-sea mining slurry pumps.