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Effect of the elevated initial temperature on the laminar flame speeds of oxy-methane mixtures

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  • Hu, Xianzhong
  • Yu, Qingbo

Abstract

The effect of the elevated initial temperature on the laminar flame speeds of CH4/O2/CO2 mixtures is investigated. Firstly, the measurements of the laminar flame speeds of methane at O2/CO2 atmosphere are performed in the condition of the elevated initial temperature using a Bunsen burner. The laminar flame speeds are predicted with the GRI 3.0 mechanisms. The effect of the elevated initial temperature is discussed by the kinetic simulation. The elevated unburned gas temperature increases the adiabatic flame temperature, which accelerates the combustion reaction rates and laminar burning velocities of gas mixtures. Then, the absolute and the relative differences with the transport, radiative and chemical effects of the high CO2 content are calculated respectively. The transport and radiative effects are insignificant and the chemical effect is much larger than the transport and radiative effects. Finally, the chemical reaction process is also investigated with the sensitivity analysis and reaction pathway analysis. The elevated initial temperature changes the combustion process slightly, but accelerates the global combustion reaction rate of oxy-methane mixture.

Suggested Citation

  • Hu, Xianzhong & Yu, Qingbo, 2018. "Effect of the elevated initial temperature on the laminar flame speeds of oxy-methane mixtures," Energy, Elsevier, vol. 147(C), pages 876-883.
    • Handle: RePEc:eee:energy:v:147:y:2018:i:c:p:876-883
    DOI: 10.1016/j.energy.2018.01.088
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    References listed on IDEAS

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    1. Feng, Huijun & Chen, Lingen & Xie, Zhihui & Sun, Fengrui, 2015. "“Disc-point” heat and mass transfer constructal optimization for solid–gas reactors based on entropy generation minimization," Energy, Elsevier, vol. 83(C), pages 431-437.
    2. Nair, Aswathy & Velamati, Ratna Kishore & Kumar, Sudarshan, 2016. "Effect OF CO2/N2 dilution on laminar burning velocity of liquid petroleum gas-air mixtures at elevated temperatures," Energy, Elsevier, vol. 100(C), pages 145-153.
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    4. de Persis, Stéphanie & Foucher, Fabrice & Pillier, Laure & Osorio, Vladimiro & Gökalp, Iskender, 2013. "Effects of O2 enrichment and CO2 dilution on laminar methane flames," Energy, Elsevier, vol. 55(C), pages 1055-1066.
    5. Hu, Xianzhong & Yu, Qingbo & Liu, Junxiang & Sun, Nan, 2014. "Investigation of laminar flame speeds of CH4/O2/CO2 mixtures at ordinary pressure and kinetic simulation," Energy, Elsevier, vol. 70(C), pages 626-634.
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    Cited by:

    1. Hu, Xianzhong & Yu, Qingbo & Sun, Yasong, 2020. "Effects of carbon dioxide on the upper flammability limits of methane in O2/CO2 atmosphere," Energy, Elsevier, vol. 208(C).
    2. Xu, Cangsu & Wang, Hanyu & Oppong, Francis & Li, Xiaolu & Zhou, Kangquan & Zhou, Wenhua & Wu, Siyuan & Wang, Chongming, 2020. "Determination of laminar burning characteristics of a surrogate for a pyrolysis fuel using constant volume method," Energy, Elsevier, vol. 190(C).
    3. Xiao, Peng & Lee, Chia-fon & Wu, Han & Liu, Fushui, 2020. "Effects of hydrogen addition on the laminar methanol-air flame under different initial temperatures," Renewable Energy, Elsevier, vol. 154(C), pages 209-222.

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