Numerical Investigation on the Influence of Turbulence Models on Prediction of Flow Characteristics of a Scramjet Combustor

Abstract

The present work discusses an investigation of behavior of several turbulence models applied to prediction of combustion characteristics of scramjet combustor. In order to evaluate and compare the effectiveness of different turbulent models to predict combustion characteristics, Standard k–ε, Realizable k–ε, and SST k–ω have been considered. The predicted wall static pressure at downstream locations is compared with the experimental and numerical results. It was found that the SST k–ω turbulence model shows the best agreement with the experimental results. Further, it was observed that the SST k–ω turbulence model shows a relatively greater penetration height as compared to other turbulence models. Further, our results reveal that the prediction of shock wave impingement, mixing rate, and vortices is affected by choice of turbulence model used.