Computational studies of supersonic combustion flame instabilities; a large-eddy simulation approach

Supersonic combustion has seen significant interest in the past decades due its applications to high-speed air-breathing propulsion. However, the supersonic combustion and factors that impact it are still not well understood and this is due to the experimental and computational challenges associated with the high-speed turbulent flows. Thus, the array of fuel injectors and their arrangement can impact the turbulent mixing and combustion efficiency and this is subject of investigation in this research. The computational studies are carried out using the large-eddy simulation (LES) approach along with the flamet model. The study concerns the effect of the Mach number and fuel injection scheme on the combustion efficiency. The combustion efficiency is assessed based on the temperature developed inside the supersonic cavity.