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The characteristics of the near field of the granular jet

机译：粒状射流近场特性

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摘要

This paper investigates the characteristics of the near field of the granular jet (e.g., diameter of granular jet core d_c, width of dispersed jet d, and thickness of boundary layer δ). Through image analysis, we find that particle superficial velocity has an important influence on those characteristics. In addition, d and δ linearly grow with the distance from the nozzle exit at first and then remain constant; this phenomenon differs from that in a single-phase jet. The vertical velocity field of the two sides of the jet core is directly obtained by particle image velocimetry. The calculation results suggest that the velocity profile of the boundary layer near the nozzle exit is a parabolic distribution.
机译：本文研究了粒状射流的近场特性（例如粒状射​​流芯的直径d_c，分散射流d的宽度和边界层δ的厚度）。通过图像分析，我们发现颗粒表面速度对这些特性有重要影响。另外，d和δ首先随着距喷嘴出口的距离线性增长，然后保持恒定。这种现象不同于单相射流。射流芯两侧的垂直速度场是通过粒子图像测速法直接获得的。计算结果表明，喷嘴出口附近边界层的速度分布为抛物线分布。

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  • 来源
    《Fuel》 |2014年第1期|17-23|共7页
  • 作者

    Wenguang Cao; Haifeng Liu; Weifeng Li; Jianliang Xu;

  • 作者单位

    Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China;

    Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China;

    Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China;

    Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, PR China Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, P.O. Box 272, Shanghai 200237, 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

    Gasification; Granular jet; Boundary layer; Dispersion;

    机译：气化;颗粒射流边界层;分散;

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