Device for reducing the jet noise of a turbomachine

Details Device for reducing the jet noise of a turbomachine Device for reducing the jet noise of a turbomachine

2007-12-25

2007-12-25

Kim, Ted (Department: 3746)

Power plants

Reaction motor

Air passage bypasses combustion chamber

C060S264000, C181S220000, C239S265170, C239S265190

Reexamination Certificate

active

10887222

ABSTRACT:
A device for reducing the jet noise of a turbomachine, the turbomachine having a longitudinal axis and a substantially cylindrical nozzle extending along the longitudinal axis of the turbomachine, having a downstream end for mixing the flows of gas inside and outside the nozzle, the device comprising a plurality of corrugations disposed to extend the downstream end of the nozzle, and a plurality of notches disposed between pairs of successive corrugations in the plurality of corrugations, and the plurality of corrugations and the plurality of notches are symmetrical relative to at least one axis perpendicular to the longitudinal axis of the turbomachine so as to generate a dual counter-rotating effect between the gas flows.

REFERENCES:
patent: 3161257 (1964-12-01), Young
patent: 3568792 (1971-03-01), Urquhart
patent: 4401269 (1983-08-01), Eiler
patent: 4576002 (1986-03-01), Mavrocostas
patent: 6082635 (2000-07-01), Seiner et al.
patent: 6578355 (2003-06-01), Mundt
patent: 6606854 (2003-08-01), Siefker et al.
patent: 6640537 (2003-11-01), Tse
patent: 2002/0178711 (2002-12-01), Martens
patent: 1 160 439 (2001-12-01), None
patent: WO 00/40851 (2000-07-01), None

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