The Development and Validation of an Improved k-ω SST Turbulence Model for the Simulation of Non-Premixed Confined Methane/Air Flames

This numerical investigation aims to introduce an enhanced k-ω SST turbulence model and showcase its effectiveness in forecasting the performance of enclosed methane-air flames. The constants in this newly adapted model were calibrated through a trial-and-error method to refine its predictive accuracy. Comparisons between the outcomes derived from this computational exploration and existing experimental and numerical data, including data from Brookes and Moss (Combust Flame 116:49–61, 1999a); Brookes and Moss (Combust Flame 116:486–503, 1999b), demonstrate the resilience of the adapted k-ω SST turbulence model in emulating enclosed methane-air flames. The findings reveal that this novel turbulence model adeptly anticipates peak combustion temperature and flame length, with deviations reduced to only 0.93% and 1.67%, respectively, compared to the standard k-ω SST model, while also proficiently assessing axial and radial temperature profiles, utmost radial temperature, its precise location, and radial temperature trends, all with errors below 5%. These outcomes imply that the modified k-ω SST turbulence model could serve as a suitable option for forthcoming numerical inquiries into combustion phenomena. Moreover, this article will delve into how advancements in computational capabilities are facilitating more intricate simulations of combustion occurrences, thereby enabling more precise prognostications of their conduct.