Locally correlated SLW model for prediction of gas radiation in non-uniform media and its relationship to other global methods

Abstract

Following previous theoretical development based on the assumption of a rank correlated/comonotonic spectrum, the Locally Correlated SLW (LC-SLW) method is outlined. The relationship between the LC-SLW method and the Reference Approach SLW (RA-SLW) method and the Rank Correlated SLW method (RC-SLW) is established. Further, the relationship between these SLW model variants and other global models including the Full Spectrum Correlated-k (FSCK) and Absorption Distribution Function (ADF) models is defined. The predictive accuracy of the various SLW models is compared. It is found that, despite the fact that the RC-SLW model demonstrates better overall accuracy, the LC-SLW model may generally prove more accurate in regions of higher gas temperature. While the LC-SLW model yields improved accuracy over the RC-SLW model in regions of high temperature, it is shown that the LC-SLW model cannot claim universal improvement in predictive accuracy at all conditions.