ADJUSTABLE FLAT NOZZLE FOR GAS TURBINE ENGINE Russian patent published in 2002 - IPC

FIELD: mechanical engineering; gas turbine engines. SUBSTANCE: proposed adjustable flat nozzle has body, turnable flap and movable scoop member. Axis of rotation of turnable flap is displaced relative to axis of rotation of scoop member towards body outlet part. Outline of inner surface of scoop member inlet part is made arc-shaped, with constant radius of circumference. Outline of inner surface of scoop member outlet part is made diverging. Conjugate point of outlines of inner surfaces of inlet and outlet parts is arranged at angle α = 64-65^°. Conjugate point of inner outline and cut of scoop member is arranged at angle β = 73-74^° to inlet edge of scoop member relative to axis of rotation of scoop member. Outline of inner surface of turnable flap is made converging-diverging, with point of inflection of outlines displaced towards flap outlet part. EFFECT: improved reliability of nozzle owing to simplification of design, reduced infrared visibility, improved efficiency of engine. 3 dwg