On The Organization of Burning in a High-Velocity Flow with a Double-Belt Supply of Fuel

The burning in a two-section channel with an abrupt enlargement of its cross section in the process of double-belt supply of different-type gaseous fuels into it at a Mach number of the fuel flow M = 2.2 and at its stagnation temperature of 1700 K was numerically investigated. For the ignition of a hydrocarbon fuel fed into the channel along its axis (the first supply belt) and for the formation of a transonic regime of burning of the fuel, it was subjected to a gasdynamic pulse action, and, after this action was terminated, for the maintenance of the burning regime, the second belt of supply of a fuel (hydrogen or a hydrocarbon fuel) into the channel and the side supply of an air jet into it were organized. The Reynolds-averaged Navier–Stokes equations were solved with the use of the k–ε model of turbulence. The burning of a fuel in the channel was simulated by gross reactions. It was established that the use of hydrogen as a fuel in the second supply belt makes it possible to maintain the transonic burning regime in the channel. In this case, the side air jet breaks the shock-wave formation in the second section of the channel and, in so doing, provides a high-velocity homogeneous fuel flow in it.