Effect of Cavities to Flame Characteristics of Scramjet Engine Using Detailed Chemistry

This paper focuses on simulation of Scramjet engine’s combustion chamber using 3D-RANS equations with k-ω SST turbulence model and Non-premixed Flamelet combustion model. The simulation results validate this complex simulation model by comparing to experimental results made in Germany. Then, a flame holder—cavity—is added inside the combustion chamber to change combustion efficiency. The improvement of this modification is verified by comparing the results from different types of cavities to the result from the default geometry with 3.0% to 6.3% better of combustion efficiency value at different cross-sections.