Large-Eddy Simulations of Transverse Jet Mixing and Flame Stability in Supersonic Crossflow

Large-eddy simulations (LES) combined with the partially stirred reactor (PaSR) combustion model are employed to investigate turbulent mixing, mode, and flame stability of a sonic hydrogen jet injecting into high-enthalpy supersonic crossflow at three momentum flux ratios J, in other words, 0.71, 2.11, 4.00, respectively. The LES accuracy terms kinetic energy, power spectra density, subgrid Damkohler number is carefully addressed against various resolution criteria experimental mean pressure distribution on upper wall. ignition processes autoignition shock compression effects identified analyzed. At J=0.71, shock-induced occurs behind reflected wave, heat release dominated by premixed combustion. While for high jet-to-crossflow ratios, example, J=2.11 happens around orifice due strong bow effects, releases nonpremixed Furthermore, mechanisms stabilization, local extinction, reignition transverse further analyzed chemical explosive mode analysis.