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Experimental, Kinetic Modeling and Morphologic Study of the Premixed Combustion of Hydrogen/Methane Mixtures

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  • Miriam Reyes

    (Department of Energy and Fluid-Mechanics Engineering, University of Valladolid, Paseo del Cauce, 59, E-47011 Valladolid, Spain)

  • Rosaura Sastre

    (Department of Energy and Fluid-Mechanics Engineering, University of Valladolid, Paseo del Cauce, 59, E-47011 Valladolid, Spain)

  • Blanca Giménez

    (Department of Energy and Fluid-Mechanics Engineering, University of Valladolid, Paseo del Cauce, 59, E-47011 Valladolid, Spain)

  • Clara Sesma

    (Department of Energy and Fluid-Mechanics Engineering, University of Valladolid, Paseo del Cauce, 59, E-47011 Valladolid, Spain)

Abstract

In this work, an experimental study and kinetic characterization of the combustion process and a morphologic study of hydrogen/methane–air mixtures are presented. The experimental study was performed in an optical access cylindrical constant-volume combustion bomb. This bomb is equipped to register the instantaneous pressure during combustion and records the combustion images using the high-speed Schlieren optical technique. This provides straightforward information to compute the flame propagation speed and direct evidence of the apparition of cellularity on the flame front. Through the images of the combustion process, it is possible to conduct a morphological study of the process using a flame monitoring model. Simultaneously, by means of a two-zone thermodynamical model, with the temporal evolution of pressure as the main intake, significant parameters are determined during the combustion process of different fuels under premixed conditions: burning velocity, rate of combustion, burned and unburned temperature, burned mass fraction, and rate of heat release, among others. Experimental results are compared with kinetic modeling results obtained with the Cantera package using the Gri-Mech 3.0 kinetic mechanism. Results show that a greater percentage of hydrogen in the fuel mixture increases the burning velocity and the cellularity of the flame front surface. At the same time, leaner mixtures and higher equivalence ratios enhance the apparition of the cellularity onset in the flames. Burning velocity increases with the increase in the initial temperature and the fuel/air mixture equivalence ratio. All the results obtained were validated with other data from the literature.

Suggested Citation

  • Miriam Reyes & Rosaura Sastre & Blanca Giménez & Clara Sesma, 2022. "Experimental, Kinetic Modeling and Morphologic Study of the Premixed Combustion of Hydrogen/Methane Mixtures," Energies, MDPI, vol. 15(10), pages 1-20, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:10:p:3722-:d:818947
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    References listed on IDEAS

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    1. Zuo-Yu Sun & Guo-Xiu Li & Hong-Meng Li & Yue Zhai & Zi-Hang Zhou, 2014. "Buoyant Unstable Behavior of Initially Spherical Lean Hydrogen-Air Premixed Flames," Energies, MDPI, vol. 7(8), pages 1-19, July.
    2. Li, Ruikang & Luo, Zhenmin & Wang, Tao & Cheng, Fangming & Lin, Haifei & Zhu, Xiaochun, 2020. "Effect of initial temperature and H2 addition on explosion characteristics of H2-poor/CH4/air mixtures," Energy, Elsevier, vol. 213(C).
    3. Sun, Zuo-Yu & Li, Guo-Xiu, 2016. "Propagation characteristics of laminar spherical flames within homogeneous hydrogen-air mixtures," Energy, Elsevier, vol. 116(P1), pages 116-127.
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    Cited by:

    1. Maria Mitu & Codina Movileanu & Venera Giurcan, 2022. "The Laminar Burning Velocities of Stoichiometric Methane–Air Mixture from Closed Vessels Measurements," Energies, MDPI, vol. 15(14), pages 1-17, July.

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