Validation of Chemically Reactive Computational Fluid Dynamics Simulations of Oblique Detonation Wave Engines

In this study, external injection oblique detonation wave engine (ODWE) experiments are simulated using AMROC (Adaptive Mesh Refinement in Object-oriented C++), our block-structured, adaptive mesh refinement framework for the simulation of shock-induced combustion phenomena. Simulations in the midplane of the experimental combustion system are conducted using a two-dimensional domain with accurate embedded boundaries to create the geometry of the inlet ramp, combustor, and nozzle. The external injection system and mixing process are simplified to a perfectly mixed fuel-air stream with a known freestream Mach number, temperature, and pressure. Comparisons between numerical and experimental results are made using measured combustor wall pressures, oblique shockwave (OSW) angles, and detonation wave angles. Here, we provide all setup details that have allowed us to achieve full CFD validation for three prototype ODWE configurations experimentally investigated by Zhang et al. at the Chinese Academy of Sciences. The successful application of simple, perfectly premixed inflow conditions makes these configurations now easily accessible and provides a set of fully reproducible ODWE benchmarks for other high-speed combustion codes.