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Gas/particle flow characteristics of two swirl burners

机译:两个旋流燃烧器的气体/颗粒流特征

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摘要

A three-component particle-dynamics anemometer is used to measure, in the near-burner region, the characteristics of gas/particle two-phase flows with a centrally fuel rich swirl coal combustion burner and enhanced ignition-dual register burner, on a gas/particle two-phase test facility. Velocities, RMS velocities, particle mean diameters and particle volume flux profiles were obtained. For the centrally fuel rich burner, particles penetrate the central recirculation zone partially, and are then deflected radially. For the enhanced ignition-dual register burner, particles completely penetrate the central recirculation zone. Compared with the enhanced ignition-dual register burner, in the same cross-section, the particle volume flux peak value for the centrally fuel rich burner is much closer to the chamber axis and much larger near the chamber axis. In six cross-sections from x/d = 0.3 to 2.5, the particle volume flux in the central recirculation zone for the centrally fuel rich burner is much larger than that for the enhanced ignition-dual register burner. For the centrally fuel rich burner, most of bigger particles are resident in the region near the chamber axis and the residence time is prolonged. The influence of gas/particle flow characteristics on combustion has been analyzed.
机译:使用三组分粒子动力学风速计在靠近燃烧器的区域中测量气体/颗粒两相流的特性,该气体/颗粒两相流通过集中富燃旋流煤燃烧器和增强型点火双对流燃烧器在气体上进行测量/粒子两相测试设备。获得了速度,RMS速度,颗粒平均直径和颗粒体积通量曲线。对于集中燃料的燃烧器,颗粒部分穿透中央再循环区,然后径向偏转。对于增强的双点火对准燃烧器,颗粒完全渗透到中央再循环区域。与增强型双点火对准燃烧器相比,在相同的横截面中,中央富燃料燃烧器的颗粒体积通量峰值更接近燃烧室轴线,而在燃烧室轴线附近更大。在从x / d = 0.3到2.5的六个横截面中,中央富燃料燃烧器在中央再循环区内的颗粒体积通量远大于增强型点火双对流燃烧器的颗粒体积通量。对于集中燃料的燃烧器,大多数较大的颗粒驻留在靠近燃烧室轴线的区域中,并且停留时间延长。分析了气体/颗粒流动特性对燃烧的影响。

著录项

  • 来源
    《Energy Conversion & Management》 |2009年第5期|1180-1191|共12页
  • 作者单位

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China Postdoctoral Station of Civil Engineering, Harbin Institute of Technology, Harbin 150090, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

    Postdoctoral Station of Civil Engineering, Harbin Institute of Technology, Harbin 150090, 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

    burner; gas/particle flow; coal combustion; three-dimensional PDA;

    机译:刻录机;气体/颗粒流;燃煤三维PDA;

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