FLAT NOZZLE OF JET TURBINE ENGINE Russian patent published in 2012 - IPC F02K1/06 

FIELD: engines and pumps.

SUBSTANCE: flat nozzle of jet turbine engine includes housing, subsonic flaps which are hinged to the housing, supersonic flaps which are hinged to subsonic ones, and external flaps one end of which is hinged to the housing and the other one is hinged to supersonic flaps. Subsonic flap is made in the form of a frame consisting of two parts connected by means of cooling air channels. On the front part there rigidly installed is the screen equipped with on/off cooling air bypass valve and the gate valve which is attached by means of a hinge. Rear part is equipped with the bottom installed with possibility of being turned about transverse axis of the frame, with a bracket rigidly attached to it. Supersonic flap is equipped with external and internal heat-protective shields. Rear part of the frame is led under external screen of supersonic flap, and gate valve on the nozzle section side is connected by means of power rods to the bottom bracket and on the other side - by means of rods to on/off bypass valve.

EFFECT: invention allows reducing infrared radiation in engine unboosted operating modes.

2 cl, 4 dwg