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1. 发明公开

EP0868596A4 SOUND SUPPRESSOR EXHAUST STRUCTURE 失效
标题翻译：排气消声器
公开(公告)号：EP0868596A4
公开(公告)日：2000-04-19
申请号：EP97945166
申请日：1997-05-13
申请人： NORTHROP GRUMMAN CORP
发明人： RALPH C JR , BARD WILLIAM D , SCHEIN DAVID B
IPC分类号： F01N1/08 , F02K1/42 , F02K1/82 , F01N1/14 , F02K1/40
CPC分类号： F02K1/42 , F02K1/827 , Y02T50/671
摘要： A sound suppressor exhaust structure (10) for a jet engine. The exhaust structure has a nozzle body (12) having a generally cylindrical forward intake opening (14) to accomodate an aft end of a jet engine, and a generally quadrilateral aft exit opening (16). An openable sound suppression chamber is situated aft of the exit opening and is formed by two opposing enclosure structures (18, 20) each having a major surface (22, 24) and each hingedly attached in a clamshell manner to the nozzle body (12). The opening enclosure structures (18, 20) are indefinitely movable between an open and a closed configuration such that, when the enclosure structures (18, 20) are closed, a chamber having a generally quadrilateral cross section is defined and situated aft of the exit opening. Each enclosure structure (18, 20) has a major surface (22, 24) through which are substantially uniformly disposed a plurality of small apertures (38) such that from about 15 % to about 25 % per square foot of each major surface is void and from about 45 to 65 apertures are provided per square foot. The apertures (38) here defined are small and tightly spaced to thereby beneficially result in agressive noise suppression as well as structural light weight.

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