The effects of elevated pressure on the kinetics and extinction of hot, warm, and cool gaseous ethylene spherical diffusion flames

被引:0
|
作者
Waddell, Kendyl A. [1 ]
Yablonsky, Gregory [2 ]
Constales, Denis [3 ]
Sunderland, Peter B. [4 ]
Axelbaum, Richard L. [2 ]
机构
[1] NASA Glenn Res Ctr, Cleveland Hts, OH 44135 USA
[2] Washington Univ, Dept Energy Environm & Chem Engn, St Louis, MO USA
[3] Univ Ghent, Dept Elect & Informat Syst, Ghent, Belgium
[4] Univ Maryland, Dept Fire Protect Engn, College Pk, MD USA
基金
美国国家科学基金会; 美国国家航空航天局;
关键词
Microgravity combustion; Reaction kinetics; Warm flames; Cool flames; DROPLET COMBUSTION; REACTION-MECHANISM; MICROGRAVITY;
D O I
10.1016/j.proci.2024.105400
中图分类号
O414.1 [热力学];
学科分类号
摘要
Previous studies have found that the elevation of ambient pressure helps facilitate cool and warm flame formation. In this work, the behavior and chemical kinetics of burner-supported C2H4 microgravity spherical diffusion flames at elevated pressure are examined. Experiments were carried out aboard the International Space Station at pressures of 0.5-3 bar, and thin-filament pyrometry measurements were used to measure peak flame temperature. Flame temperatures at extinction are shown to decrease with increasing pressure, and at a pressure of 3 bar the flame is shown to extend below the critical temperature of 1130 K and into the warm flame regime. Simulations were performed using a transient numerical model with detailed chemistry, transport, and radiation. This model incorporates the San Diego mechanism with 57 species and 270 reactions, including low-temperature chemistry. Species concentrations, temperatures, reaction rates, and heat release rates are examined. When the pressure is increased to 50 bar the flame smoothly transitions into the warm flame regime, and cool flame behavior is observed in the simulations after warm flame radiative extinction. The results for hot, warm, and cool flame combustion at elevated pressure are compared to the results for hot flame burning at atmospheric pressure. The flame is shown to move from stabilizing on the oxidizer side to the fuel side as temperature decreases. The HO2 radical becomes the dominant radical early in the flame lifetime and is largely responsible for the emergence of low-temperature chemistry.
引用
收藏
页数:7
相关论文
共 24 条
  • [1] Kinetics and extinction of non-premixed cool and warm flames of dimethyl ether at elevated pressure
    Wang, Ziyu
    Yan, Chao
    Lin, Ying
    Zhou, Mengni
    Jiang, Bo
    Liu, Ning
    Zhong, Hongtao
    Ju, Yiguang
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2023, 39 (02) : 1871 - 1879
  • [2] The kinetics and warm flame chemistry associated with radiative extinction of spherical diffusion flames
    Waddell, Kendyl A.
    Yablonsky, Gregory
    Constales, Denis
    Sunderland, Peter B.
    Axelbaum, Richard L.
    [J]. COMBUSTION THEORY AND MODELLING, 2024, 28 (04) : 441 - 458
  • [3] Radiative extinction of gaseous spherical diffusion flames in microgravity
    Santa, K. J.
    Chao, B. H.
    Sunderland, P. B.
    Urban, D. L.
    Stocker, D. P.
    Axelbaum, R. L.
    [J]. COMBUSTION AND FLAME, 2007, 151 (04) : 665 - 675
  • [4] Dynamics and burning limits of near-limit hot, warm, and cool diffusion flames of dimethyl ether at elevated pressures
    Lin, Eric
    Reuter, Christopher B.
    Ju, Yiguang
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2019, 37 (02) : 1791 - 1798
  • [5] Spherical Diffusion Flames of Ethylene in Microgravity: Multidimensional Effects
    Frolov, Sergey M.
    Ivanov, Vladislav S.
    Frolov, Fedor S.
    Semenov, Ilya V.
    [J]. FIRE-SWITZERLAND, 2023, 6 (08):
  • [6] Kinetic effects of NO addition on n -dodecane cool and warm diffusion flames
    Zhou, Mengni
    Yehia, Omar R.
    Reuter, Christopher B.
    Burger, Christopher M.
    Murakami, Yuki
    Zhao, Hao
    Ju, Yiguang
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2021, 38 (02) : 2351 - 2360
  • [7] The effects of water dilution on hydrogen, syngas, and ethylene flames at elevated pressure
    Santner, Jeffrey
    Dryer, Frederick L.
    Ju, Yiguang
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2013, 34 : 719 - 726
  • [8] Experimental and kinetic studies of extinction limits of counterflow cool and hot diffusion flames of ammonia/n-dodecane
    Xu, Shuang
    Li, Gesheng
    Zhou, Mengni
    Yu, Weiping
    Zhang, Zunhua
    Hou, Di
    Yu, Fulin
    [J]. COMBUSTION AND FLAME, 2022, 245
  • [9] A numerical study on the effects of pressure and gravity in laminar ethylene diffusion flames
    Charest, Marc R. J.
    Groth, Clinton P. T.
    Guelder, Oemer L.
    [J]. COMBUSTION AND FLAME, 2011, 158 (10) : 1933 - 1945
  • [10] Pressure effects on reactivity and extinction of n-dodecane diffusion cool flame
    Wang, Ziyu
    Thawko, Andy
    Mei, Bowen
    Xu, Wenbin
    Law, Chung K.
    Ju, Yiguang
    [J]. COMBUSTION AND FLAME, 2023, 254