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특허 상세정보

Engine noise

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F02K-001/00   
미국특허분류(USC) 181/213; 181/220; 181/214; 181/215; 181/219; 244/001.0N; 244/053.0B; 244/062; 415/119
출원번호 UP-0366747 (2006-03-03)
등록번호 US-7735601 (2010-07-05)
우선권정보 GB-0505246.9(2005-03-15)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Oliff & Berridge, PLC
인용정보 피인용 횟수 : 33  인용 특허 : 0
초록

In order to provide noise suppression, bumps or undulations are provided on a nozzle surface in order to vary the convergent-divergent ratio between that surface and an opposed nozzle surface. By such an approach, a circumferential variation in the shock cell pattern is created and the flow is deflected so as to enhance turbulent mixing thereby suppressing noise.

대표
청구항

We claim: 1. A nozzle for a gas turbine engine, the nozzle comprising a nozzle surface defining a plurality of undulations to vary in a circumferential direction, perpendicular to a jet flow direction, an available cross sectional area across the nozzle between the nozzle surface and an opposed surface of the nozzle over a desired convergent-divergent ratio range for noise control of the jet passing through the nozzle in use, wherein the undulations have amplitude in the range 0.1-2.0% of the nozzle exit diameter to attenuate shock cell noise. 2. A no...

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