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首页> 外文期刊>Energy >Combustion and emission characteristics of premixed CNG/H_2/CO/CO_2 blending synthetic gas flames in a combustor with variable geometric swirl number
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Combustion and emission characteristics of premixed CNG/H_2/CO/CO_2 blending synthetic gas flames in a combustor with variable geometric swirl number

机译：预混合CNG / H_2 / CO_2混合合成气体的燃烧和排放特性在具有可变几何旋流号的燃烧器中的合成气体火焰

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摘要

This paper presents the results of experimental studies conducted on premixed CNG/H-2/CO/CO2 blending synthetic gas flames in a laboratory scale combustor, with particular emphasis on effects of swirl number (from 0.2 to 1.6, at intervals of 0.2) and equivalence ratio (0.6, 0.8 and 1.0) on combustion and emission characteristics of such mixtures. Furthermore, effects of swirl number on lean blowout and flashback limits of studied mixtures were also investigated. Irrespective of the swirl number and equivalence ratio, H-2/CO ratios of tested gas mixtures were kept constant (1.0), and mixtures of H-2/CO/CNG/CO2 which were diluted with different amount of CO2 (0-20%, at intervals of 5%) were derived. Considering broadest operating range, mixture of 20%CNG/30%H-2/30%CO/20%CO2 was determined as base fuel to be tested. Combustion and emission behavior of tested gas mixtures were assessed by examining axial and radial temperature, NOx, CO and CO2 distributions. Besides, swirl number and equivalence ratio effects on flame structure were evaluated by investigating instantaneous flame images (with the same focal length and exposure time). Results of this study showed that effects of swirl number on flame characteristics (temperature and pollutant emission distributions) is not monotonous, and equivalence ratio dependent flame behavior alters differently at different swirl numbers. (C) 2019 Elsevier Ltd. All rights reserved.
机译：本文介绍了在实验室燃烧室中预混的CNG / H-2 / CO / CO2混合合成气体的实验研究结果，特别强调涡流数（0.2至1.6，以0.2的间隔为0.2）等效率（0.6,0.8和1.0）在这种混合物的燃烧和排放特性上进行燃烧和排放特性。此外，还研究了旋流数对研究混合物的瘦井喷和倒装限制的影响。无论涡旋数和等效率均值如何，对测试气体混合物的H-2 / CO比保持恒定（1.0），并用不同量的CO 2稀释的H-2 / CO / CNG / CO 2的混合物（0-20衍生出5％的间隔的％。考虑最广泛的工作范围，将20％CNG / 30％H-2/30％CO / 20％CO 2的混合物确定为待测试的基础燃料。通过检查轴向和径向温度，NOx，CO和CO2分布来评估测试气体混合物的燃烧和排放行为。此外，通过研究瞬时火焰图像（具有相同的焦距和曝光时间）来评估对火焰结构的旋流数和等效率效应。该研究的结果表明，旋流数对火焰特性（温度和污染物排放分布）的影响不是单调的，并且在不同漩涡数中不同地改变等效率依赖性火焰行为。 （c）2019 Elsevier Ltd.保留所有权利。

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  • 来源
    《Energy》 |2019年第1期|117-133|共17页
  • 作者

    Yilmaz Harun; Yilmaz Ilker;

  • 作者单位

    Erzincan Binali Yildirim Univ Dept Airframes & Powerplants Ali Cavit Celebioglu Civil Aviat Coll TR-24002 Erzincan Turkey;

    Erciyes Univ Fac Aeronaut & Astronaut Dept Airframes & Powerplants TR-38030 Kayseri Turkey;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Synthetic gas combustion; Swirl number; Equivalence ratio;

    机译：合成气体燃烧;漩涡号;等价率;

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