FORCED DUAL-CIRCUIT EJECTOR PULSATING AIR-JET ENGINE Russian patent published in 2020 - IPC F02K7/67 

FIELD: military equipment; machine building.

SUBSTANCE: invention relates to equipment, mainly military equipment, namely to aircraft engines, and can be used, most likely, in engine of small drones. Forced double-circuit ejector pulsating air-jet engine includes, in particular, combustion chamber, inlet system of the first and second mixers, aerodynamic valves, fuel manifold and fuel supply nozzles, fuel heating coil, resonator tube with partial diffuser opening. Rear wall of combustion chamber has the first apron with rectangular slots for formation of flat jet flows behind them. Inside the combustion chamber behind the first apron there is a perforated recess with the second shield protruding inside the flow. Fuel heating coil has a coiling in a non-uniform diameter and a slanting axis. Resonator tube with a partial diffuser opening in the inlet cylindrical part from the lower side contains annular inclined semi-ribs of turbulence promoters.

EFFECT: invention provides higher thermodynamic efficiency by increasing amplitude of pressure pulsations, which occurs during acceleration of combustion process, achieved by intensification of mass transfer in combustion chamber.

1 cl, 4 dwg