The dependence of chemistry on the inlet equivalence ratio in vortex-flame interactions

摘要: Abstract : The interaction of a vortex pair with premixed flame serves as an important prototype for turbulent combustion. In this study, we investigate the counter-rotating initially flat methane flame. We compare computational solutions obtained using time-dependent, two-dimensional adaptive low Mach number combustion algorithm that incorporates GRI-Mech 1.2 chemistry, thermodynamics, and transport chemical species. discuss mechanical nature flame-vortex features are strongly affected by fuel equivalence ratio, . find circulation around scours gas from preheat zone in front flame, making sensitive to ratio. For cases 1, peak mole fraction CH across is relatively insensitive vortex, whereas richer flames observe substantial rapid decline fraction, commencing early interaction. concentration HCO found correlate, both space time, heat release broad range ratios. model also predicts measurable increase C2H2 result marked low-temperature chemistry activity.