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Numerical investigation on the mutual interaction between heat transfer and non-spherical particle dynamics in the blast furnace raceway

机译：高炉滚道传热与非球形粒子动力学相互相互作用的数值研究

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摘要

In this paper, the coupled computational fluid dynamics (CFD) and discrete element method (DEM) scheme is used to investigate the microstructure and heat transfer characteristics in a blast furnace (BF) raceway. The impact of gas velocity and particle shape on raceway evolution, microstructure characteristics, and particle temperature and voidage distributions is comprehensively explored based on the voidage change caused by the consumption of coke particles. Numerical results show that the oblate ellipsoidal particle system possesses higher average voidage in the original packing state and implements the faster burden descending rate than the prolate one under the same inlet velocity. For the non-spherical particle systems, larger contact forces exist in the oblate ellipsoidal particle system while the contact forces in the prolate ellipsoidal particle system are smaller. More uniform temperature distribution and higher average voidage can be caused by higher inlet gas velocities. Meanwhile, more prolate ellipsoidal particles are consumed than oblate ones under the same inlet velocity. These findings could be beneficial for understanding the kinetic and thermodynamic behaviors of particulate system within a BF raceway.
机译：在本文中，耦合计算流体动力学（CFD）和分立元件方法（DEM）方案用于研究高炉（BF）滚道中的微观结构和传热特性。基于由焦炭颗粒消耗引起的空转变化，全面探索了气体速度和颗粒形状对滚道演化，微观结构特性和粒子温度和空隙分布的影响。数值结果表明，扁椭圆形颗粒系统在原始包装状态下具有更高的平均空隙，并在相同的入口速度下实现比环胶的更快的负荷下降率。对于非球形颗粒系统，在扁平椭圆形颗粒系统中存在较大的接触力，同时加仑椭圆形颗粒体系中的接触力较小。更均匀的温度分布和更高的平均空隙可以由更高的入口气体速度引起。同时，在相同的入口速度下消耗更多的椭圆形颗粒。这些发现可能有利于理解BF滚道内微粒系统的动力动力学行为。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2020年第6期|119577.1-119577.12|共12页
  • 作者

    Guangchao Wei; Hao Zhang; Xizhong An; Dianyu E;

  • 作者单位

    Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education School of Metallurgy Northeastern University Shenyang 110819 PR China;

    Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education School of Metallurgy Northeastern University Shenyang 110819 PR China;

    Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education School of Metallurgy Northeastern University Shenyang 110819 PR China;

    International Research Institute for Minerals Metallurgy and Materials Jiangxi University of Science and Technology Nanchang 330013 PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CFD-DEM simulation; Ellipsoidal particle; Heat transfer; Dynamic behaviours; Blast furnace raceway;

    机译：CFD-DEM仿真;椭圆形颗粒;传播热量;动态行为;高炉赛道;

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