Influence of oxy-firing on radiation transfer to the glass melt in an industrial furnace: Importance of spectral radiation model

Abstract

Coupled reactive fluid dynamics and radiation calculations are performed in air and oxy-fuel-fired industrial glass furnaces using two gas radiative property models. The first one is the weighted sum of gray gases model and the second one is the correlated-/c method, which is a spectral model based on the cumulative distribution function of the absorption coefficient inside a narrow band. The first model, generally used in glass furnaces, is less time-consuming than the second one. However, discrepancies up to several tens of percent are found in the local heat flux on the glass surface between the two radiative models, especially in air combustion.