Systems and methods for control of engine exhaust flow

Details Systems and methods for control of engine exhaust flow Systems and methods for control of engine exhaust flow

2007-10-29

2010-11-02

Collins, Timothy D (Department: 3644)

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

C244S213000, C244S198000

Reexamination Certificate

active

07823840

ABSTRACT:
Coanda Effect and lift produced along a surface of an airfoil are increased by ducting compressed fluid from the engine to the surface of the airfoil. An engine produces exhaust gases that are predominantly directed toward an aft end of the aircraft by a cowling or other structure as an exhaust plume. One or more internal ducts extend from the engine to the surface of the airfoil to thereby transmit a compressed fluid from the engine to the surface in order to suppress flow separation along the surface, thereby causing the engine exhaust flow to remain attached to the surface over a wider span. Such structures and techniques may find particular use in aircraft designed to exploit upper surface blowing (USB) techniques and structures for short takeoff and landing (STOL) performance.

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“YC-14 Advanced Medium STOL Transport (AMST)”, http://www.globalsecurity.org/military/systems/aircraft/c-14.htm.

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