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首页> 外文期刊>Combustion and Flame >Effects of hydrogen and nitrogen on soot volume fraction, primary particle diameter and temperature in laminar ethylene/air diffusion flames
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Effects of hydrogen and nitrogen on soot volume fraction, primary particle diameter and temperature in laminar ethylene/air diffusion flames

机译：氢和氮对层状乙烯/空气扩散火焰中烟尘体积分数，一次粒径和温度的影响

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摘要

This study reports the effects of hydrogen (H-2) and nitrogen (N-2) blended into the fuel on soot evolution and flame temperature in axisymmetric ethylene/air diffusion flames at atmospheric pressure. Two series of laminar ethylene (C2H4) diffusion flames blended with H-2 and N-2 were experimentally investigated, in which soot volume fraction (f(nu)), primary particle diameter (d(p)) and flame temperature (T) were measured using planar laser-based techniques. These twelve flames are grouped into two sets. In the first one, H-2 or N-2 are added into a constant volumetric flow of C2H4 to separate their complementary effects. In the second set, the total volumetric flow rate of the mixture of C2H4/H-2/N-2 was kept constant for the same ratios of dilution to isolate the influence of exit velocity. For both sets, a reference flame corresponding to a mixture of C2H4/H-2/N-2 =40%/40%/20%, by volume, was included to match the fuel composition of a turbulent 'target' sooting flame (termed the "Adelaide simple jet flame" in the International Sooting Flames Workshop). Planar laser-induced incandescence (LII), time-resolved LII (TiRe-LII) and two-line atomic fluorescence (TLAF) thermometry (using atomic indium as tracer) were applied to measure f(nu), d(p) and T. Radial profiles of the flame temperature were also measured using a thermocouple positioned 3 mm above the burner lip, which is just upstream from the sooting region. It is found that dilution either with H-2 or N-2 causes a significant reduction in f(nu) and dp, while the influence on the peak flame temperature is weaker. Flame structure (length and spatial profiles) is also influenced by the blending with H-2 and N-2. This database can serve as benchmark for model development due to its systematic nature and combination of measured scalars. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：这项研究报告了在大气压力下，轴对称乙烯/空气扩散火焰中，掺入燃料中的氢（H-2）和氮（N-2）对烟灰释放和火焰温度的影响。实验研究了两个与H-2和N-2混合的层状乙烯（C2H4）扩散火焰，其中烟尘体积分数（f（nu）），一次粒径（d（p））和火焰温度（T）使用基于平面激光的技术进行测量。这十二个火焰分为两组。在第一个中，将H-2或N-2添加到恒定体积的C2H4中以分离它们的互补作用。在第二组中，对于相同的稀释比例，C2H4 / H-2 / N-2混合物的总体积流速保持恒定，以隔离出口速度的影响。对于这两组燃料，都包括一个按体积计对应于C2H4 / H-2 / N-2 = 40％/ 40％/ 20％的混合物的参考火焰，以匹配湍流``目标''吹灰火焰的燃料成分（在国际吹灰会议上被称为“阿德莱德简易喷射火焰”。应用平面激光诱导白炽灯（LII），时间分辨LII（TiRe-LII）和两线原子荧光（TLAF）测温法（使用原子铟作为示踪剂）测量f（nu），d（p）和T火焰温度的径向分布也使用位于燃烧器唇缘上方3 mm处的热电偶进行测量，该热偶位于烟ot区域的上游。发现用H-2或N-2稀释会导致f（nu）和dp显着降低，而对峰值火焰温度的影响则较弱。火焰结构（长度和空间分布）也受到与H-2和N-2混合的影响。该数据库由于其系统性和已测量标量的组合，因此可以用作模型开发的基准。 （C）2016年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

著录项

  • 来源
    《Combustion and Flame》 |2017年第1期|270-282|共13页
  • 作者

    Sun Zhiwei; Dally Bassam; Nathan Graham; Alwahabi Zeyad;

  • 作者单位

    Univ Adelaide, Sch Mech Engn, Adelaide, SA 5005, Australia|Univ Adelaide, Ctr Energy Technol, Adelaide, SA 5005, Australia;

    Univ Adelaide, Sch Mech Engn, Adelaide, SA 5005, Australia|Univ Adelaide, Ctr Energy Technol, Adelaide, SA 5005, Australia;

    Univ Adelaide, Sch Mech Engn, Adelaide, SA 5005, Australia|Univ Adelaide, Ctr Energy Technol, Adelaide, SA 5005, Australia;

    Univ Adelaide, Ctr Energy Technol, Adelaide, SA 5005, Australia|Univ Adelaide, Sch Chem Engn, Adelaide, SA 5005, Australia;

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

    Soot volume fraction; Primary particle diameter; Temperature; Dilution effect; Hydrogen; Nitrogen;

    机译：烟灰体积分数;一次粒径;温度;稀释作用;氢;氮;

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