ABSTRAKT

A macro-random model is developed for calculation of radiative properties in gases in spectral regions populated by vibrational bands of absorption. The general idea of the model is that each vibrational band is considered as an isolated line of absorption. The shape of the line is described following the approximations suggested by Edwards. The average transition in a spectral region is obtained by multiplication of separate band transitions.
The macro-random model is computationally very effective as it allows to determine averaged radiative characteristics without the use of “line by line” integration or any group models. The calculations are performed as if there is a single spectral region.
For calculation of radiative heat transfer in non-uniform volumes the Curtis-Godson method is used.
Calculations of radiative heat transfer in non-uniform flat layers, containing CO₂ and H₂O gases are carried out with the use of the macro-random model.