UNBOOSTED TURBOJET ENGINE Russian patent published in 2018 - IPC F02K3/77 

FIELD: motors and pumps.

SUBSTANCE: invention relates to the gas turbine engines intended for long-term operation on the subsonic stealthy aircraft. Unboosted turbojet engine includes gas generator, fan connected to the low pressure turbine, internal circuit path, connected to the fan last stage and to the high pressure compressor, external circuit path, connected to the fan last stage and to the mixer. Third circuit path is connected to the third circuit path exhaust nozzle. Mixer is made with nonadjustable areas. Downstream of mixer, the thrust reverser module is coaxially installed, deflecting the mixed gas flow by the angle of more than 90° from the gas flow direction. Downstream of the thrust reverser module the mixed gas flat exhaust nozzle with curved channel is installed, on which walls inner surface the radar absorbing coating is applied. Mixed gas exhaust nozzle with the thrust vector control has the critical and output cross sections adjustable areas. Third circuit path is connected to the fan intermediate stage by the input, and is equipped with the air bypass valve unit. Downstream of the fan the third circuit path in the cross section is the ring, in the propulsion units box cross section are two flattened branch pipes on the engine side surface with streamlined cutouts for the engine front support, in the thrust reverser module cross section are two flattened branch pipes on the engine side surface with streamlined cutouts for the engine rear support, in the mixed gas exhaust nozzle cross sections is the surface distant from the visible from the rear hemisphere exhaust nozzle walls.

EFFECT: invention allows to reduce the specific fuel consumption with the structure minimum weight, improve the aircraft maneuverability, and reduce the aircraft visibility level in the rear hemisphere.

10 cl, 5 dwg