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Factors influencing the characterization of bubbles produced by coaxial gas-particle jet flow

机译:影响同轴气体颗粒射流产生的气泡特征的因素

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摘要

The effect of particle mass flow rate and annular channel thickness on the formation and characteristics of the bubbles is investigated experimentally by high-speed digital photography. A criterion is proposed to determine the emergence of the bubbles. The experimental results demonstrate that the particle mass flow rate and the annular channel thickness are both crucial factors for the bubble-formation process. The bubble size, bubble growth rates and bubbling frequency are investigated by analyzing a large number of images. The radial growth rate of the bubble is still governed by the superficial air jet velocity. In addition, the radial velocity difference between the gas and particle phase is confirmed to be the main cause of bubbling.
机译:通过高速数码摄影实验研究了颗粒质量流量和环形通道厚度对气泡形成和特性的影响。提出了确定气泡出现的标准。实验结果表明,颗粒质量流量和环形通道厚度都是气泡形成过程的关键因素。通过分析大量图像来研究气泡尺寸,气泡生长速率和鼓泡频率。气泡的径向增长率仍由表面空气喷射速度决定。另外,气相和颗粒相之间的径向速度差被确认是起泡的主要原因。

著录项

  • 来源
    《Fuel》 |2013年第6期|723-730|共8页
  • 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

    bubble; annular granular jet; particle mass flow rate; annular channel thickness;

    机译:气泡;环形颗粒射流颗粒质量流量环形通道厚度;

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