Laminar Combustion Characteristics of Premixed Shale Gas and Air Flames
Publication: Journal of Energy Engineering
Volume 146, Issue 3
Abstract
The laminar combustion characteristics of premixed shale gas/air flames were studied by spherical expansion flame experiments and chemical kinetics simulations. The influence of the initial temperature, the initial pressure, and the equivalent ratio on the laminar flame propagation process was analyzed. The variation of the laminar burning velocity and the flame stability with the initial conditions is discussed. The change trend of the reactants and products in the shale gas laminar flame was studied. The relationships between the important free radicals, the adiabatic flame temperature, and the laminar burning rate were analyzed. The results show that the initial temperature had little influence on the chemical reaction rate, the flame propagation process was stable, and the mole fraction peak increased, which was the main reason for the enhancement of the laminar burning velocity. When the initial pressure increased, the chemical reaction rate increased obviously, the concentration of H, O, and OH decreased, the velocity of flame propagation was slowed, and the stability of the front flame was reduced. When the equivalent ratio was 1.0, the velocity of the laminar flame was the fastest, the inhibition effect of the lean mixture on the velocity of the flame propagation was stronger than that of the concentrated mixture, and with the increase of the equivalence ratio, the front flame became stable.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request (Figs. 2–18).
Acknowledgments
This study was supported by the National Natural Science Foundation of China under Grant No. 51776089, the China Postdoctoral Science Foundation Project (2019M651732), the Natural Science Research Projects in Jiangsu higher education institutions (18KJB470006), the Open Research Subject of Key Laboratory of Automobile Measurement and Control and Safety (QCCK2019-004), and the eighteenth groups of student scientific research projects in Jiangsu University (18B202).
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Published In
Journal of Energy Engineering
Volume 146 • Issue 3 • June 2020
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©2020 American Society of Civil Engineers.
History
Received: Aug 7, 2019
Accepted: Jan 3, 2020
Published online: Apr 11, 2020
Published in print: Jun 1, 2020
Discussion open until: Sep 11, 2020
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