ADJUSTABLE NOISE REDUCTION NOZZLE OF SUPERSONIC PASSENGER AIRCRAFT Russian patent published in 2023 - IPC F02K1/34 

FIELD: aviation technology.

SUBSTANCE: invention relates to the design of an adjustable noise-attenuating nozzle of a supersonic passenger aircraft and can be used in the production of flat output devices of a turbojet engine intended for long-term operation in the supersonic flight mode of a passenger aircraft. The adjustable noise-attenuating nozzle comprises side and upper walls, and a lower elongated wall with a rotating flap and includes a main circuit channel formed by the upper and side walls of the nozzle and a flow separator, a secondary circuit channel located lower relative to the main circuit channel, and an additional channel. The flow separator is made in the form of a fixed partition, the secondary circuit channel is formed by an intermediate partition, the rear edge of which and the corresponding edge of the fixed partition are combined with the critical section of the nozzle, and the rotary flap is configured for combining its front movable edge with the corresponding edges of the fixed and intermediate partitions facing it. The additional channel is located lower relative to the secondary circuit channel and is intended for air discharge. The nozzle is equipped with a through window designed for ejection of outside air, a damper installed in guides configured for axial reciprocating movement relative to the window, and a pocket made in the lower elongated wall of the nozzle and intended to accommodate the damper.

EFFECT: improved operating efficiency of an adjustable noise-attenuating nozzle in various operating conditions.

1 cl, 3 dwg