STRUCTURE OF DIFFUSION AND PREMIXED LAMINAR COUNTERFLOW FLAMES INCLUDING MOLECULAR RADIATIVE-TRANSFER

The interaction between radiation and combustion is studied theoretica lly in the case of strained counterflow nonluminous laminar flames. Bo th H-2 - O2 diffusion and C3H8 - air premixed flames are considered. C alculations are based on detailed chemical kinetics and narrow-band st atistical modeling of infrared radiative properties. It is shown that radiative transfer decreases the temperature level, which affects part icularly the production and consumption of minor species and pollutant s. For H-2 - O2 flames, a low strain rate extinction limit due to radi ation is found. It is also shown that the commonly used approximation of optically thin medium is inaccurate, even for the small-scale labor atory flames considered here.