Controlled detonation initiation in hypersonic flow

Experimental evidence of controlled detonation initiation and propagation in a hypersonic flow premixed hydrogen-air is presented. This created facility capable producing Mach 5 hydrogen-air. Flow diagnostics such as high-speed schlieren OH* chemiluminescence results show that flame deflagration-to-detonation transition occurs combined result turbulent acceleration shock-focusing. The experimental define three new distinct regimes flow: (DDT), unsteady compressible flames, shock-induced combustion. A two-dimensional implicit-LES (ILES) simulation, which solves the compressible, reactive Navier-Stokes equations on an adapting grid conducted to provide additional insight into local physical mechanism propagation.