Research of Particle Motion in a Two-Stage Slurry Transport Pump for Deep-Ocean Mining by the CFD-DEM Method
Research of Particle Motion in a Two-Stage Slurry Transport Pump for Deep-Ocean Mining by the CFD-DEM Method
复制标题
CFD-DEM方法研究深海采矿两级泥浆输送泵中的颗粒运动
DOI：
10.3390/en13246711
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发表时间：
2020-12
期刊：
影响因子：
3.2
通讯作者：
Peter Balaz
中科院分区：
文献类型：
--
作者：
Xianghui Su;Zhenji Tang;Yi Li;Zuchao Zhu;Kamila Mianowicz;Peter Balaz
矿浆输送泵是深海采矿系统的关键设备。粗颗粒在泵内的运动规律还不够清楚。本文构建了实验室规模的两级浆体输送泵水力模型，采用计算流体力学-离散元法（CFD-DEM）对泵内粗颗粒的运动特性进行了数值研究。通过实验测量得到了该泵的性能曲线，验证了计算结果的可靠性。由于放大流量设计方法的应用，使泵的最佳效率点移向大流量工况。比较了两个阶段粒子群算法的差异。详细研究了颗粒在叶轮和扩压器内的位置分布、速度变化和运动轨迹。颗粒离开叶轮的速度取决于它们是否与叶轮叶片碰撞。将颗粒在扩散器内的运动分为三个阶段。在第二阶段，颗粒与叶片的碰撞不仅造成能量损失，而且颗粒的周向速度逐渐转化为轴向速度。该工作可为渣浆泵防磨防堵的研究提供参考。
The slurry transport pump is the key equipment of deep-ocean mining systems. The motion law of coarse particles in the pump is not clear enough. In this paper, a hydraulic model of a laboratory-scale two-stage slurry transport pump is constructed, and the motion characteristics of coarse particles in the pump are numerically studied by using the computational fluid dynamics–discrete element method (CFD-DEM) method. The performance curve of the pump is obtained by experimental measurement, and the reliability of the calculated results is verified. Due to the application of the amplification flow rate design method, the optimum efficiency point of the pump is shifted to the large flow rate condition. Differences in particle swarm within two stages are compared. The position distribution, velocity variation and trajectory of particles in the impeller and bowl diffuser are studied in detail. The velocity of particles leaving the impeller depends on whether they collide with the impeller blade. The motion of particles in the bowl diffuser is divided into three periods. Collision between particles and blades in the bowl diffuser not only leads to energy loss but also gradually transforms the circumferential velocity of particles into axial velocity in the second period. This work can provide a reference for the study of wear and blockage prevention of slurry transport pumps.
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影响因子：
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DOI：
10.1016/j.ijmultiphaseflow.2016.11.002
发表时间：
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