OH* and CH* chemiluminescence characteristics in low swirl methane-air flames

被引:7
|
作者
Liu, Yao [1 ]
Tan, Jianguo [1 ]
Wan, Minggang [1 ]
Yao, Xiao [1 ]
机构
[1] Natl Univ Def Technol, Coll Aerosp Sci & Engn, Changsha 410073, Peoples R China
基金
中国国家自然科学基金;
关键词
HEAT RELEASE; COMBUSTION; LUMINESCENCE; EMISSION;
D O I
10.1063/5.0002660
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Chemiluminescence information is of great significance for characterization of flame structure and combustion characteristics. An atmospheric low swirl burner was developed to investigate the chemiluminescence characteristics of OH* and CH* in low swirl flames, with the equivalence ratio varying from 0.8 to 1.2 and the swirl number from 0.2 to 0.6. The chemiluminescence images were captured via ICCD cameras coupled with narrow-bandpass filters, and an Abel inversion method was introduced to transform the line-of-sight-integrated image into two-dimensional radial distributions. The results show that the distribution of CH* is smaller than that of OH* and concentrated more upstream of the flame near the burner. The equivalence ratio has a relatively more direct influence on chemical reactions, while the swirl number has a more evident effect on the flame structure. As the equivalence ratio increases, the peak value of OH* and CH* increases and the peak position moves downstream of the flame, suggesting that the chemical reactions become more intense. In contrast, the height and width of chemiluminescence distribution increase linearly with increasing swirl number. Moreover, it is found that the equivalence ratio and swirl number can be feasibly estimated based on chemiluminescence measurement results, using the correlation between them derived from this study.
引用
收藏
页数:9
相关论文
共 50 条
  • [41] STUDIES OF METHANE AND METHANE-AIR FLAMES IMPINGING ON A COLD PLATE
    MILSON, A
    CHIGIER, NA
    COMBUSTION AND FLAME, 1973, 21 (03) : 295 - 305
  • [42] Spatially resolved measurement of OH*, CH*, and C2* chemiluminescence in the reaction zone of laminar methane/air premixed flames
    Kojima, J
    Ikeda, Y
    Nakajima, T
    PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2000, 28 : 1757 - 1764
  • [43] Kinetic Effects of Hydrogen Addition on the Thermal Characteristics of Methane-Air Premixed Flames
    Li, Qingfang
    Hu, Ge
    Liao, Shiyong
    Cheng, Qian
    Zhang, Chi
    Yuan, Chun
    ENERGY & FUELS, 2014, 28 (06) : 4118 - 4129
  • [44] Flame characteristics of hydrogen-enriched methane-air premixed swirling flames
    Kim, Han S.
    Arghode, Vaibhav K.
    Gupta, Ashwani K.
    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2009, 34 (02) : 1063 - 1073
  • [45] Effect of Ammonia on Laminar Combustion Characteristics of Methane-Air Flames at Elevated Pressures
    Jin, Tao
    Dong, Wenlong
    Qiu, Bingbing
    Xu, Cangsu
    Liu, Ya
    Chu, Huaqiang
    ACS OMEGA, 2022, 7 (17): : 15326 - 15337
  • [46] On the Stability and Characteristics of Biogas/Methane/Air Flames Fired by a Double Swirl Burner
    Abdulnaim, A.
    Elkholy, A.
    Elmously, M.
    Moneib, H.
    Roberts, W. L.
    Elbaz, A. M.
    FLOW TURBULENCE AND COMBUSTION, 2024, 112 (03) : 751 - 767
  • [47] OH chemiluminescence of methane-hydrogen premixed flames
    Moriyama, Tatsuya
    Kimura, Wataru
    Asai, Hiroki
    Yamamoto, Kazuhiro
    JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY, 2021, 16 (03) : 1 - 15
  • [48] On the Stability and Characteristics of Biogas/Methane/Air Flames Fired by a Double Swirl Burner
    A. Abdulnaim
    A. Elkholy
    M. Elmously
    H. Moneib
    W. L. Roberts
    A. M. Elbaz
    Flow, Turbulence and Combustion, 2024, 112 : 751 - 767
  • [49] Effects of stretch and pressure on the characteristics of premixed swirling tubular methane-air flames
    Zhang, Yuyin
    Ishizuka, Satoru
    Zhu, Huayang
    Kee, Robert J.
    PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2009, 32 : 1149 - 1156
  • [50] Chemiluminescence-based multivariate sensing of local equivalence ratios in premixed atmospheric methane-air flames
    Tripathi, Markandey M.
    Krishnan, Sundar R.
    Srinivasan, Kalyan K.
    Yueh, Fang-Yu
    Singh, Jagdish P.
    FUEL, 2012, 93 (01) : 684 - 691