[특허]Jet engine fixed plug noise suppressor

[미국특허] Jet engine fixed plug noise suppressor 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02K-003/02 F01N-001/04
출원번호	US-0692185 (1991-04-26)
발명자 / 주소	Torkelson Delbert W. (Claremore OK)
출원인 / 주소	Nordam (Tulsa OK 02)
인용정보	피인용 횟수 : 22 인용 특허 : 0

초록 ▼

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.

대표청구항 ▼

For use with a turbofan engine having an exhaust end and a longitudinal engine axis, a noise suppressor system comprising: a tubular exhaust shroud affixed to the engine exhaust end, the shroud having an internal circumferential area and having a forward end and an aft end; an elongated centerbody supported within said exhaust shroud and having an external cross-sectional area less than the internal cross-sectional area of said exhaust shroud providing an annular area of desired channel height through which thrust producing exhaust gases of the engine pass; acoustical lining affixed to at least a substantial portion of said internal circumferential area of said shroud in the area thereof receiving said centerbody and acoustical lining affixed to at least a substantial portion of said centerbody in the area thereof received within said exhaust shroud, whereby at least a portion of said annular area through which thrust producing engine exhaust gases pass is acoustically lined; and said acoustical linings affixed to said exhaust shroud and said centerbody having different sound frequency attenuation characteristics from one point to another within said annular area whereby sound of different frequencies is absorbed at different points within said annular area and whereby a preselected band of sound frequencies is attenuated.

이 특허를 인용한 특허 (22) 인용/피인용 타임라인 분석

Harrison, Geoffrey E., Annular acoustic panel.
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Eriksen, Uffe; Lorentzen, Steffen; Munk-Hansen, Thorkil; Thygesen, Claus, Apparatus for dampening of acoustic noise generated by air-cooling of at least one wind turbine component provided with the nacelle of a wind turbine.
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Le Docte, Thierry Jacques Albert; Vicogne, Laurent Marcel, Cooling device for the primary nozzle of a dual-flow turbojet engine.
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Batey J. Gary, Core flow expansion chamber device system for reduction of jet turbine engine noise.
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Mardjono, Jacky Novi; Julliard, Jacques Michel Albert; Riou, Georges Jean Xavier, Device for acoustic treatment of the noise emitted by a turbojet.
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Zysman Steven H. (Middletown CT) Lord Wesley K. (Glastonbury CT) Barber Thomas J. (West Hartford CT), Double lobed mixer with major and minor lobes.
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Bouchard, Richard; Pietrobon, John; Durocher, Eric, Gas turbine exhaust case.
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Bouchard, Richard; Girard, Gaetan; Pronovost, Christian, Gas turbine exhaust case with acoustic panels.
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Chase, James D.; Garzon, German Andres, Jet nozzle plug with varying, non-circular cross sections.
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Forsyth, David William, Long-duct, mixed-flow nozzle system for a turbofan engine.
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Crosta, Franck; Prat, Damien, Method for reducing sound output at the back of a turbo engine and turbo engine improved by this method.
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Zysman Steven H. ; Lord Wesley K. ; Barber Thomas J., Method of noise suppression for a turbine engine.
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Hanson Donald B., Noise reducing stator assembly for a gas turbine engine.
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Hanson Donald B., Noise reducing stator assembly for a gas turbine engine.
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Lair, Jean-Pierre, Pivoting door thrust reverser for a turbofan gas turbine engine.
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Bouchard, Richard; Trottier, Daniel; Girard, Gaetan, Strut mounting arrangement for gas turbine exhaust case.
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Lair, Jean-Pierre, Thrust reverser.
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Lair, Jean-Pierre, Thrust reverser door.
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Lair, Jean-Pierre, Thrust reverser door.
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Lair, Jean-Pierre, Thrust reverser for a turbofan gas turbine engine.
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Lair, Jean-Pierre; Weaver, Paul, Thrust reverser for a turbofan gas turbine engine.
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Lair, Jean-Pierre, Thrust reverser nozzle for a turbofan gas turbine engine.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Jet engine fixed plug noise suppressor 원문보기