Abstract
The effects of radiative heat loss on temperature and NO formation of CH4/air and that of CH4/CO2/air counterflow diffusion flames were numerically investigated by using detailed chemistry and transport properties with emphasis on assessing the importance of radiation reabsorption. Radiative heat transfer was calculated using the discrete ordinate method, and the radiative properties of the main emitting species, H2O, CO2 and CO, in these flames were represented using a statistical narrow-band model. Results show that radiation reabsorption has little influence on the NO formation of CH4/air flame. However, radiation reabsorption does have a significant effect on the NO formation and temperature of CH4/CO2/air flames, especially for low stretch rates.
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