基于CFD-DPM的大规模颗粒-流体系统数值仿真与分析

doi:10.3901/JME.2022.22.450

机械工程学报 ›› 2022, Vol. 58 ›› Issue (22): 450-461.doi: 10.3901/JME.2022.22.450

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基于CFD-DPM的大规模颗粒-流体系统数值仿真与分析

李浩¹, 程嘉辉¹, 孙春亚¹, 李客², 谢贵重¹, 王昊琪¹, 黄荣杰¹, 郝兵², 刘俊², 王新昌²

1. 郑州轻工业大学河南省机械装备智能制造重点实验室郑州 450002;
2. 中信重工机械股份有限公司洛阳 471003

收稿日期:2021-12-05 修回日期:2022-03-25 出版日期:2022-11-20 发布日期:2023-02-07
通讯作者: 孙春亚(通信作者),男,1988年出生,博士,讲师。主要研究方向为产品优化设计、复杂系统多物理场耦合。E-mail:2019056@zzuli.edu.cn
作者简介:李浩,男,1981年出生,博士,教授,博士研究生导师。主要研究方向为智能制造服务、设计方法学、数字孪生。E-mail:lihao@zzuli.edu.cn
基金资助:
国家自然科学基金(52175256);河南省科技攻关(212102210070)资助项目

Numerical Simulation and Analysis of Large-scale Particle Fluid System Based on CFD-DPM Method

LI Hao¹, CHENG Jia-hui¹, SUN Chun-ya¹, LI Ke², XIE Gui-zhong¹, WANG Hao-qi¹, HUANG Rong-jie¹, HAO Bing², LIU Jun², WANG Xin-chang²

1. Henan Key Laboratory of Intelligent Manufacturing of Mechanical Equipment, Zhengzhou University of Light Industry, Zhengzhou 450002;
2. CITIC Heavy Industries Co., Ltd., Luoyang 471003

Received:2021-12-05 Revised:2022-03-25 Online:2022-11-20 Published:2023-02-07

摘要/Abstract

摘要： 大规模复杂颗粒-流体系统主要运行参数与多物理场形态的关联机制不清晰,试验研究方法难以对这些运行参数和质量特性之间的耦合关系进行精准描述。为了探究大型立磨运行过程中多物理场耦合工作机理,通过构建粗粒非解析CFD-DPM耦合模型进行数值模拟,分析主要运行参数对立磨流场、颗粒分级、粒度分布以及成品质量的影响,模拟结果与实际工况运行结果吻合度较好,验证了所建数值计算模型能够有效地模拟出大规模颗粒-流体系统的动态选粉过程。结果表明,系统风量与选粉机转速直接影响着立磨离心分级的切割粒径与成品细度,当其它参数不变,随着系统风量增大切割粒径值变大、成品比表面积越小;当只改变选粉装置转速,切割粒径随着转速增大而减小、成品比表面积越大。

关键词: 颗粒-流体系统, 数值仿真, 粒度分布, CFD-DPM耦合法, Rosin-Rammler分布

Abstract: The correlation mechanism between the main operating parameters of large-scale complex particle fluid system and the morphology of multiple physical fields is not clear, and the experimental research methods are difficult to accurately describe the coupling relationship between these parameters and mass characteristics. In order to explore the working mechanism of multi-physics coupling during the operation of vertical mills, numerical calculation is carried out by establishing a coarse-grained non-analytical CFD-DPM coupling model, and the effects of operating parameters on the vertical mill flow field, particle classification, particle size distribution and the finished product is analyzed. The simulation results are in good agreement with the actual operating results. It is verified that the numerical calculation model can effectively simulate the dynamic powder separation process of large-scale particle-fluid system. The results show that the air volume of the system and the rotating speed of the powder separator directly affect the cutoff diameter of the vertical mill centrifugal classification and the fineness of the finished product. When other parameters remain unchanged, the cutoff diameter increases and the specific surface area of the finished product decreases with the increase of the system air volume. When only changing the rotating speed, the cutting particle size decreases and the specific surface area increases with the increase of rotating speed.

Key words: particle-fluid system, numerical simulation, particle size distribution, CFD-DPM coupling method, Rosin-Rammler distribution

中图分类号:

TG156

李浩, 程嘉辉, 孙春亚, 李客, 谢贵重, 王昊琪, 黄荣杰, 郝兵, 刘俊, 王新昌. 基于CFD-DPM的大规模颗粒-流体系统数值仿真与分析[J]. 机械工程学报, 2022, 58(22): 450-461.

LI Hao, CHENG Jia-hui, SUN Chun-ya, LI Ke, XIE Gui-zhong, WANG Hao-qi, HUANG Rong-jie, HAO Bing, LIU Jun, WANG Xin-chang. Numerical Simulation and Analysis of Large-scale Particle Fluid System Based on CFD-DPM Method[J]. Journal of Mechanical Engineering, 2022, 58(22): 450-461.

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基于CFD-DPM的大规模颗粒-流体系统数值仿真与分析

Numerical Simulation and Analysis of Large-scale Particle Fluid System Based on CFD-DPM Method

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