Research of Particle Motion in a Two-Stage Slurry Transport Pump for Deep-Ocean Mining by the CFD-DEM Method
Open Access
- 18 December 2020
- Vol. 13 (24), 6711
- https://doi.org/10.3390/en13246711
Abstract
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.This publication has 25 references indexed in Scilit:
- Deep-Sea Nodules and Co-rich Mn CrustsMarine Georesources & Geotechnology, 2014
- Deep-ocean mineral deposits as a source of critical metals for high- and green-technology applications: Comparison with land-based resourcesOre Geology Reviews, 2013
- Algorithms in a Robust Hybrid CFD-DEM Solver for Particle-Laden FlowsCommunications in Computational Physics, 2011
- Numerical Simulation of the Gas−Solid Flow in Three-Dimensional Pneumatic Conveying BendsIndustrial & Engineering Chemistry Research, 2008
- Numerical modelling of deep sea air-liftOcean Engineering, 2008
- Investigations of Particle Velocities in a Slurry Pump Using PIV: Part 1, The Tongue and Adjacent Channel FlowJournal of Energy Resources Technology, 2004
- An articulated pipe‐miner system with thrust control for deep‐ocean crust miningMarine Georesources & Geotechnology, 1998
- LDV Measurements in a Centrifugal Slurry Pump: Water and Dilute Slurry FlowsJournal of Fluids Engineering, 1992
- Aspects of Computer Simulation of Liquid-Fueled CombustorsJournal of Energy, 1983
- An investigation of particle trajectories in two-phase flow systemsJournal of Fluid Mechanics, 1972