Core reflex nozzle for turbofan engine

Details Core reflex nozzle for turbofan engine Core reflex nozzle for turbofan engine

2011-08-23

2011-08-23

Sandvik, Benjamin (Department: 2826)

Rotary kinetic fluid motors or pumps

Working fluid bypass

C415S116000, C415S226000

Reexamination Certificate

active

08002520

ABSTRACT:
A turbofan engine is provided that includes a core nacelle at least partially surrounded by a fan nacelle. The core nacelle includes a reflex nozzle providing a core exit. The core nacelle includes a contour on its exterior surface upstream from the reflex nozzle. The contour is generally conical and tapers toward the core exit at a first slope. The reflex nozzle tapers toward the exit at a second slope that is less steep than the first slope. The reflex nozzle includes a generally linear portion. In one example, the reflex nozzle is provided by a generally cylindrical extension that sufficiently turns the bypass flow away from the core exit so that the core flow does not become choked.

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