Two-dimensional semi-empirical numerical model for analysis of experimental data on supersonic combustion of hydrogen

Experiments is presented on burning of hydrogen injected into a channel (duct) with a supersonic high-temperature flow at the entrance are analyzed using a specially developed two-dimensional semi-empirical model based on numerical integration of parabolized Navier–Stokes equations with regard for finite rates of chemical reactions. It is shown that the appearance of two combustion modes with “short” and “long” regions of elevated pressure in the experiments considered is caused by the fact that heat release may occur both in an immediate vicinity of injectors and along the whole duct with the formation of a global separation (stagnation) region. The duct flow in both combustion modes remains supersonic, except for regions limited in size.