FLAT OUTPUT DEVICE OF THREE-LOOP GAS TURBINE ENGINE OF VARIABLE CYCLE Russian patent published in 2019 - IPC F02K1/12 F02K1/46 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering, particularly to design of flat multifunctional output devices for variable cycle three-loop gas turbine engine. Flat output device of three-loop gas turbine engine of variable cycle comprises housing of main nozzle channel, consisting of subsonic part, tapering in cross section of housing cavity, interconnected by inlet section with channels of first and second circuits of engine and having rectangular shape in output section, and supersonic part with increasing along gas flow area of rectangular cross-section of housing cavity, docked with subsonic part in its outlet section, and two rings fixed on the main nozzle channel housing to form upper and lower additional nozzle channels interconnected with the engine third circuit channel. Supersonic part of main nozzle channel body has two vertical and lower transverse walls rigidly connected to subsonic part, and upper rotary wall with drive mechanism, hingedly fixed on upper edge of outlet section of subsonic part of housing, and shells of upper and lower additional nozzle channels have movably installed locking elements with drive for adjustment of flow area of these channels. Upper rotary wall of supersonic part of housing is equipped with chevrons located on its output edge, locking element of the upper additional nozzle channel is made in the form of a rotary flap with a drive hinged on the shell of the upper additional nozzle channel with possibility of constant interaction with the upper rotary wall. Locking element of lower additional nozzle channel is made in form of shaped body installed on inner surface of shell of lower additional nozzle channel with possibility of back-and-forth movement in axial direction and having convex shaped locking surface arranged to interact with free edge of transverse wall of supersonic part of main nozzle channel housing.

EFFECT: invention allows combining reduction of noise level of main jet of flat output device at takeoff low-noise mode and low values of losses of thrust of output device at supersonic cruising mode.

1 cl, 7 dwg