Outwardly propagating spherical flame with cellular instability and laminar burning velocities in methane/ethylene/air premixed flames

Abstract
Experiments in expanding spherical flame were carried out to investigate unstretched laminar burning velocities by adding ethylene mole fractions of 0.1, 0.2, and 0.3 to methane-air mixtures at room temperature and elevated pressures up to 4 atm. Our experimental methodology was validated through comparison of a variety of flame radius ranges from previous experimental studies and three kinds of extrapolation model with numerical ones in methane-air premixed flames. Based on them, also the wrinkling of methane/air with increase of ethylene addition is examined experimentally and theoretically under increased pressure at various equivalence ratios.

Acknowledgements
This research was supported by SGER Program through the National Research Foundation of Korea (NRF) founded by the Ministry of Education.

Publisher
Combustion Institute

Conference/Event Name
11th Asia-Pacific Conference on Combustion, ASPACC 2017

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