Gas turbine engine noise shield

Details Gas turbine engine noise shield Gas turbine engine noise shield

1975-02-14

1976-06-22

Hix, L. T.

Acoustics

Auditorium

181 64A, 60 3929, 415119, E04B 199

Patent

active

039645681

ABSTRACT:
Positionable deflector means are provided in a gas turbine engine inlet duct. The deflector means are actuated to change the axial and circumferential location of a forward protruding extension of the inlet duct in order to selectively reduce noise propagation. A method is disclosed for directional noise shielding as a gas turbine engine experiences altitude and operational changes.

REFERENCES:
patent: 2970431 (1961-02-01), Harshman
patent: 3027710 (1962-04-01), Maytner
patent: 3481427 (1969-12-01), Dobbs
patent: 3545464 (1970-12-01), Brown
patent: 3565208 (1971-02-01), Millman
patent: 3590944 (1971-07-01), Millman
patent: 3621933 (1971-11-01), Raynes
patent: 3717163 (1973-02-01), Herr
patent: 3739984 (1973-06-01), Tontini
patent: 3750689 (1973-08-01), Britt
patent: 3820626 (1974-06-01), Bonneaud

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