In this study the prediction accuracy of latest versions of FSK and SLW models (Rank correlated) and WSGG model is assessed at the limit of smallest computation cost. The results of these predictions are compared with the Line-by-Line benchmark calculations. One-dimensional decoupled radiation calculation is performed on a variety of case studies in order to investigate the limit of computational cost where the accuracy of FSK and SLW model are able to surpass WSGG. The subpar performance of RC-SLW at three quadrature points is addressed by optimizing model parameters. The possibility of using an approximated mixture database is also assessed where the RC-FSK model is able to yield satisfactory results with as low as four quadrature points. Regarding the utilization of approximated curves, again the method seems to be working slightly better with RC-FSK. The outcomes of this analysis may serve as guidance regarding the efficient implementation of FSK or SLW models in CFD codes.

中文翻译：

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气体混合物热辐射非灰色全局模型精度与计算成本之间的折衷


在本研究中，最新版本的 FSK 和 SLW 模型（Rank 相关）以及 WSGG 模型的预测精度在最小计算成本的限制下进行评估。这些预测的结果与逐行基准计算进行比较。在各种案例研究中进行一维解耦辐射计算，以研究 FSK 和 SLW 模型的精度能够超越 WSGG 的计算成本极限。通过优化模型参数解决了 RC-SLW 在三个正交点处性能不佳的问题。还评估了使用近似混合数据库的可能性，其中 RC-FSK 模型能够以低至四个正交点产生令人满意的结果。关于近似曲线的利用，该方法似乎在 RC-FSK 中效果稍好一些。该分析的结果可以作为在 CFD 代码中有效实施 FSK 或 SLW 模型的指导。