Overlap corrections for emissivity calculations of H2O–CO2–CO–N2 mixtures

Abstract Calculations of total gas emissivities of gas mixtures containing several radiatively active species require corrections for band overlapping. In this paper, we generate such overlap correction charts for H 2 O − CO 2 − N 2 , H 2 O − CO − N 2 , and CO 2 − CO − N 2 mixtures. These charts are applicable in the 0.1 to 40 bar total pressure range and in the 500 K to 2500 K temperature range. For H 2 O − CO 2 − N 2 mixtures, differences between our charts and Hottel’s graphs as well as models of Leckner and Modak are highlighted and analyzed.