The choice of optimal absorption coefficient in the Rank-Correlated SLW model for prediction of radiative transfer in high temperature gases

The choice of gray gas absorption coefficient in the Rank Correlated Spectral Line Weighted-sum-of-gray-gases (RC-SLW) model is investigated. Several options are considered for calculating cross-section from bounding supplemental cross-sections, including that determined by inversion F-variable using Gauss Quadratures, Geometric Mean values, Arithmetic Mean, and finally, a value weighting cross-sections variable interval fraction f. It shown an optimal can only be accounting path length L. However, test cases theoretical confirmation reveal preferred method. approach also nominally twice as fast computationally Quadrature used original RC-SLW formulation. Therefore, this may viewed enhancement to model.