| CH4/O2同轴射流扩散火焰辐射发光特性 |
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| 引用本文： | 张婷,郭庆华,龚岩,周志杰,于广锁.CH4/O2同轴射流扩散火焰辐射发光特性[J].燃烧科学与技术,2012,18(4):353-358. |
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| 作者姓名： | 张婷 郭庆华 龚岩 周志杰 于广锁 |
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| 作者单位： | 华东理工大学煤气化教育部重点实验室,上海,200237 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目(2010CB227004);国家自然科学基金资助项目(20876048) |
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| 摘 要： | 利用分光成像系统,实时收集O2/CH4同轴射流扩散火焰辐射发光信息,重点讨论火焰中3种激发态自由基组分(OH*、CH*和C2*)的发光特征.探讨3种激发态自由基的产生机理;分析OH*、CH*和C2*的辐射强度随氧气/燃料当量比的变化,及其沿扩散火焰轴向分布特征等.结果表明:激发态自由基均由化学激发途径产生,其辐射发光为化学发光;OH*辐射发光强度随氧气/燃料当量比变化显著,可采用OH*]/CH*]表征当量比变化;OH*辐射强度可以作为扩散火焰化学反应区及高度的表征.
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| 关 键 词： | 扩散火焰 化学发光 OH*辐射 |
Luminescent Properties of CH4/O2Co-Flowing Jet Diffusion Flame |
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| ZHANG Ting
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GUO Qing-hua
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GONG Yan
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ZHOU Zhi-jie
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YU Guang-suo.Luminescent Properties of CH4/O2Co-Flowing Jet Diffusion Flame[J].Journal of Combustion Science and Technology,2012,18(4):353-358. |
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| Authors: | ZHANG Ting GUO Qing-hua GONG Yan ZHOU Zhi-jie YU Guang-suo |
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| Affiliation: | (Coal Gasification Key Laboratory of the Ministry of Education,East China University of Science and Technology,Shanghai 200237,China) |
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| Abstract: | Luminescent emissions from three excited state radicals(OH*,CH* and C2*)have been measured in O2/CH4 co-flowing jet diffusion flames.The fiber optic spectrometer allowed global and simultaneous measurements of luminescence intensity in flames,which were used to analyze the excitation mechanisms of excited state radicals,the effect of O2/CH4 equivalence ratio on the radiant intensity of OH*,CH* and C2*,and the distribution of radiant intensity along the flame axis.The results show that chemical excitations are the major excitation mechanisms of OH*,CH* and C2*,OH* emission changes significantly with and O2/CH4 equivalence ratio,OH*]/CH*] emission intensity ratio is a good indicator of O2/CH4 equivalence ratio,and reaction zone and flame height can also be estimated by OH* emission intensity along the flame axis. |
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| Keywords: | diffusion flame chemiluminescent emission OH* emission |
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