Jet engine fixed plug noise suppressor

Details Jet engine fixed plug noise suppressor Jet engine fixed plug noise suppressor

1991-04-26

1992-12-01

Vrablik, John J.

Power plants

Reaction motor

Interrelated reaction motors

60271, 181213, F02K 302, F01N 104

Patent

active

051671182

ABSTRACT:
A noise suppressor for use with a turbofan engine, the suppressor being formed of a tubular exhaust shroud affixed to the engine exhaust end, the shroud providing an internal circumferential surface, a flow mixture affixed to the engine exhaust end, an elongated centerbody supported within the exhaust shroud and having an external cross-sectional area less than the internal cross-sectional area of the shroud providing an annular area through which thrust producing exhaust gases of the engine pass, acoustic lining affixed to a substantial portion of the internal circumferential area of the exhaust shroud in the portion thereof receiving the centerbody, and acoustical lining affixed to a substantial portion of the exterior area of the centerbody in the area thereof received within the exhaust shroud so that thereby the thrust producing gases pass through an area of reduced channel height. A substantial portion of the annular area through which the gases pass is encompassed by acoustical lining.

REFERENCES:
patent: 3750402 (1973-08-01), Vdoviak et al.
patent: 4433751 (1984-02-01), Bonneau
patent: 4696159 (1987-09-01), Horgan

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