Combined effects of nongray radiation and pressure on premixed CH4/O2/CO2 flames

The combined effects of non-gray radiation and pressure on the propagation and flammability limits of premixed CH4/O2/CO2 flames were investigated numerically at an ambient temperature of 300 K over the pressure range of 0.04–0.50 MPa and the CO2 dilution range of 0.40–0.79 molar fraction of CO2 in the oxidant. A statistical narrow-band (SNB) model and an optically thin model (OTM) were used to describe flame radiation heat transfer in...