Variable area plug nozzle

Details Variable area plug nozzle Variable area plug nozzle

2005-01-25

2005-01-25

Yu, Justine R. (Department: 3746)

Power plants

Reaction motor

Plural motive fluid generating means or plural outlets

C060S204000, C060S771000, C181S213000

Reexamination Certificate

active

06845607

ABSTRACT:
A center plug is configured for variable area use in an exhaust nozzle. A forward portion of the plug includes an inlet having a closing flap therein, and an aft portion of the plug includes an outlet. The flap is selectively open during aircraft takeoff operation and up to a preset climb altitude for bypassing a portion of core exhaust flow through the plug, with the flap being closed from preset altitude and cruise operation. Opening the flap correspondingly increases the available flow area for discharging the exhaust flow for reducing velocity thereof, and attenuating noise.

REFERENCES:
patent: 3084507 (1963-04-01), Kleinhaus et al.
patent: 3390837 (1968-07-01), Freeman
patent: 3829020 (1974-08-01), Stearns
patent: 3910375 (1975-10-01), Hache et al.
patent: 4501393 (1985-02-01), Klees et al.
patent: 4537026 (1985-08-01), Nightingale
patent: 5184459 (1993-02-01), McAndrews

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