Influence of turbulence fluctuation of temperature and gas composition was examined based on absorption line database, in relation to the radiative heat flux toward the wall of large-scale industrial furnaces. Though some kinds of contrivance were included in the evaluation of radiative heat flux for relieving computation load, results obtained in this examination are equivalent to line-by-line analyses pursuing turbulence fluctuation. Combining our method about radiative heat flux with the governing equation solver for obtaining the spatial distribution of time-averaged values of velocity, temperature and so on, we can evaluate the heat flux both by radiative transfer and by turbulent transfer. As results, though the negligence of turbulence leads to obvious changes both in the distribution of radiative heat flux and in the spatial distribution of time-averaged temperature, influence on the total of wall heat flux is not so remarkable.
