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Influence of Stokes number on the particle phase distribution behaviors in a rolling circulating fluidized beds (RCFB)

机译：Stokes数对滚动流化床粒子相分布行为的影响（RCFB）

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摘要

The treatment of exhaust gas from large diesel engines is an important factor to affect environment. Because of its advantages in reaction efficiency and heat transfer efficiency, circulating fluidized bed (CFB) has shown great potential with regard to save energy and purify emissions from large diesel engines. This paper mainly investigated a three-dimensional modeling of the CFB, and a rolling function is applied to simulate its unsteady working conditions, which is called the rolling circulation fluidized bed (RCFB). Two-fluid model based on Euler-Euler approach is utilized to numerically simulate the gas-solid two phases flow within the RCFB. In order to give the comparable results between the present simulation and the previous experiment, the effect of Stokes number on particle phase distribution behaviors in the RCFB is investigated. By simulating the overall swing condition of the RCFB based on a dynamic grid, the effect of the swing condition on particle radial distribution uniformity in the riser is obtained. The reliability of quantitative modeling is verified based on the experimental results of the extant literature. Based on this simulation, the influence of the Stokes number on the radial distribution of particles as well as the relationship between the uniformity of the distribution and particle size is obtained.
机译：来自大型柴油发动机的废气的处理是影响环境的重要因素。由于其在反应效率和传热效率方面的优点，循环流化床（CFB）在节省能量和净化大型柴油发动机的排放方面具有巨大潜力。本文主要研究了CFB的三维建模，施加了一种滚动功能来模拟其不稳定的工作条件，称为滚动循环流化床（RCFB）。基于Euler-euler方法的双流体模型用于数值上模拟RCFB内的气固两相流。为了给出目前模拟和先前实验之间的可比结果，研究了Stokes数对RCFB中粒子相分布行为的影响。通过基于动态网格模拟RCFB的整体摆动条件，获得摆动条件对提升管中的粒子径向分布均匀性的影响。基于现存文献的实验结果验证了定量建模的可靠性。基于该模拟，获得了Stokes数对粒子径向分布的影响以及分布和粒度的均匀性之间的关系。

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  • 来源
    《Journal of visualization》 |2021年第4期|733-748|共16页
  • 作者

    Pengwei Wang; Tong Zhao; Kai Liu; Zhilong Wang;

  • 作者单位

    Faculty of Mechanical and Precision Instrument Engineering Xi'an University of Technology 5 South Jinhua Road Xi'an 710048 Shaanxi China Department of Electromechanical Engineering Sichuan Engineering Technical College No.801 Section 2 Taishan South Road Deyang PRC. 618000 Sichuan China;

    Faculty of Mechanical and Precision Instrument Engineering Xi'an University of Technology 5 South Jinhua Road Xi'an 710048 Shaanxi China;

    Faculty of Mechanical and Precision Instrument Engineering Xi'an University of Technology 5 South Jinhua Road Xi'an 710048 Shaanxi China;

    Faculty of Mechanical and Precision Instrument Engineering Xi'an University of Technology 5 South Jinhua Road Xi'an 710048 Shaanxi China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Large diesel engine; Circulating fluidized bed; Euler-Euler model; Stokes; Particle distribution;

    机译：大柴油发动机;流化床;欧拉欧拉模型;斯托克斯;粒子分布;

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