Combustion Dynamics of Microwave Enhanced Flame
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© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. We present a mathematical model of microwave assisted flame speed enhancement including effects of seeding with sodium, taking into account joule heating and non-thermal effects connected with the formation of excited oxygen states. We show that thermal heating by the microwave discharge is the main source of the flame speed increase, but the formation of singlet oxygen can also influence the flame speed, causing an additional increase of about 3% for a stoichiometric methane-air mixture and electric field strength below breakdown threshold. At low concentrations of sodium, when the flame speed suppression effect of sodium is low but the flame conductivity enhanced, we can achieve a flame speed increase with more efficient coupling the microwave energy to the flame front.
author list (cited authors)
Tropina, A., & Miles, R. B.