基于结构化网格的两级矿浆泵数值模拟分析

为了研究深海采矿两级矿浆泵泵内固液流体流动规律及工作性能,采用计算流体动力学软件CFD对两级矿浆泵泵内的固液两相湍流进行了数值模拟和性能预测.阐述了矿浆泵计算流道区域的拓扑块划分方法和结构化网格生成方法;采用RNGκ-ε湍流模型和多参考坐标系,进行全三维流场数值模拟,分析了矿浆泵内流场的压力分布、流速分布和湍动能分布,进而计算出不同颗粒属性的泵的特性曲线.研究表明,颗粒属性对矿浆泵工作性能有重要影响,在颗粒体积分数相同的条件下,泵的扬程和效率均随颗粒粒径的减小而增大.颗粒的体积分数适宜控制在5%~10%左右.

Numerical Simulation of Two-Stage Slurry Pump Based on Structural Mesh

In order to investigate the solid-liquid fluid flowing law and work performance of two-stage slurry pump for deep-sea mining，numerical simulation and performance prediction to the two-stage slurry pump were conducted by using the computational fluid dynamics software. The methods of topological blocking and structural meshing in the domain of the slurry pump were described. A three-dimensional turbulent flow simulation was performed with a RNG κ-ε turbulence model and multiple reference frame to obtain pressure， velocity and kinetic energy distribution. Furthermore， the performance curve of the slurry pump with different particle properties was determined based on the simulation results. The research shows that the particle properties have an important influence on the working performance of slurry pump. With the same particle concentration， the head and efficiency of the pump are increased with the decrease of particle size. It is appropriate to control the particle concentration of 5%-10%.