| 袁宝磊, 刘磊, 杨建民.深海采矿摆动管道中矿石颗粒水力提升数值模拟研究[J].海洋工程,2025,(4):24~36 |
| 深海采矿摆动管道中矿石颗粒水力提升数值模拟研究 |
| Numerical investigation on the hydraulic transport of ore particles in swaying pipelines during deep-sea mining |
| 投稿时间：2024-10-18 |
| DOI：10.16483/j.issn.1005-9865.2025.04.003 |
| 中文关键词: 深海采矿 水力提升 摆动管道 固液两相流 CFD-DEM |
| 英文关键词:deep-sea mining hydraulic transport swaying pipeline solid-liquid two-phase flow CFD-DEM |
| 基金项目:国家自然科学基金资助项目（42476222） |
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| 摘要点击次数: 10 |
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| 中文摘要: |
| 矿石颗粒在摆动管道中的水力提升是深海采矿工程的重要研究内容。采用计算流体动力学（computational fluid dynamics，简称CFD）与离散元（discrete element method，简称DEM）耦合方法针对摆动管道中的颗粒输送进行数值模拟。针对研究对象建立管道模型，在管道摆动同时以一定给料浓度（颗粒初始体积分数）稳定喷射颗粒，颗粒在给定初始流速流体的带动下向上输送。研究主要关注摆动管道中颗粒的体积分数分布、速度及颗粒碰撞，并开展其对管道摆动频率和幅值的参数敏感性分析。研究发现，颗粒在摆动管道中振荡上升，随着提升高度的增加，颗粒轴向速度逐渐增大，体积分数逐渐降低；摆动导致管道底部壁面上摆动方向侧受力集中，破坏风险较高，并使得颗粒的提升效率降低；颗粒水力提升受管道摆动幅值及频率影响明显，且相对于径向，颗粒输送参数在轴向上对摆动参数更为敏感。 |
| 英文摘要: |
| The hydraulic lifting of ore particles in swaying pipelines is an important research topic in deep-sea mining engineering. Numerical simulations of particle transport in swaying pipelines were conducted using a coupled computational fluid dynamics (CFD) and discrete element method (DEM) approach. A pipeline model was established for the study. While the pipeline was swaying, particles were steadily injected at a given feed concentration and transported upward under the influence of the fluid’s initial flow velocity. The study mainly focused on the distribution of particle volume fraction, particle velocity, and collisions in the swaying pipeline, along with a parameter sensitivity analysis regarding the swaying frequency and amplitude of the pipeline. The results indicated that particles exhibited vibrational upward movement within the swaying pipeline. As the lifting height increased, the axial particle velocity gradually increased, while the volume fraction decreased. Swaying caused stress concentration on the side of the pipeline wall in the direction of the sway, increasing the risk of structural damage and reducing particle lifting efficiency. The hydraulic lifting of particles was significantly influenced by both the amplitude and frequency of the pipeline swaying, with axial transport parameters being more sensitive to swaying parameters than radial ones. |
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