Simulation of high-pressure methane-oxygen combustion with a new reduced chemical mechanism

The modeling and simulation of methane-oxygen combustion at high pressure requires a dedicated kinetic mechanism to obtain precise description the fuel decomposition. However, using detailed mechanisms literature in high-fidelity simulations, like direct numerical is not possible due cost. Accordingly, reduced chemical required, one proposed this study contains 17 species 44 reactions encompass very large range (P?[1,100] bar) equivalence ratio (??[0.2,14]). Optimized Reduced Chemistry method, that based on directed relation graph with error propagation, applied RAMEC scheme, validations are performed for set canonical test-cases: auto-ignition delay simulation, one-dimensional laminar premixed flame freely propagating counterflow diffusion flame. A good agreement obtained by comparison mechanism. To further evaluate ability mechanism, expanding homogeneous isotropic turbulence (P=56 performed. temporal evolution front from its ignition, revealing behavior interaction turbulence. new performs well relative 4% maximum temperature each time step even less if difference observed times between two considered. Finally, substantial gain found when scheme three-dimensional cases, simulations being 8 faster than those scheme. post-processing tool contour tracing labeling method developed measure length.