Thermochemical instability of highly diluted methane mild combustion

The experimental and numerical investigation of oscillatory behaviors in methane MILD combustion is of interest to prevent undesired instable combustion regimes. In this study new speciation measurements were obtained in a jet stirred flow reactor (JSFR) for stoichiometric mixtures of CH4 and O2, diluted in N2, CO2 and N2-H2O, at p=1.1 atm and T=720-1200 K. Oscillations were experimentally detected under specific temperature ranges, where system reactivity is sufficient to promote ignition, but not high enough to sustain complete methane conversion