High admittance acoustic liner
    2.
    发明公开
    High admittance acoustic liner 有权
    声学涂层具有高导纳

    公开(公告)号:EP1612769A3

    公开(公告)日:2009-03-25

    申请号:EP05252608.4

    申请日:2005-04-27

    IPC分类号: G10K11/172

    摘要: A cooled acoustic liner useful in a fluid handling duct includes a resonator chamber (52) with a neck (56), a face sheet (86), and a coolant plenum (80) residing between the face sheet (86) and the chamber (52). Coolant bypasses the resonator chamber (52), rather than flowing through it, resulting in better acoustic admittance than in liners in which coolant flows through the resonator chamber and neck. In one embodiment, the liner also includes a graze shield (88). Openings (40, 38) penetrate both the face sheet (86) and the shield (88) to establish a relatively low face sheet porosity and a relatively high shield porosity. The shielded embodiment of the invention helps prevent a loss of acoustic admittance due to fluid grazing past the liner. Another embodiment (Fig. 6B) that is not necessarily cooled, includes the resonator chamber (52), low porosity face sheet (86) and high porosity shield (88), but no coolant plenum for bypassing coolant around the resonator chamber. An associated method of retrofitting an acoustic treatment into a fluid handling module includes installing openings (40) in the module and mounting a resonator box (44) on the module so that inlets (54) to the resonator necks (56) register with the installed openings (40).

    Turbine engine tailcone resonator
    4.
    发明公开
    Turbine engine tailcone resonator 有权
    Tailcone-Resonatorfürein Turbinentriebwerk

    公开(公告)号:EP1849974A2

    公开(公告)日:2007-10-31

    申请号:EP07250806.2

    申请日:2007-02-27

    摘要: A turbine engine resonator (80) comprising a panel (52) and a vessel (82). The panel (52) is along a flow path within the engine and has an aperture (72). The vessel (82) has a mounting flange (92) secured to the panel (52). The flange (92) has an aperture mated to the aperture (72) of the panel (52). The vessel (82) has a body secured to the mounting flange (92) with an interior of the body in communication with the flange aperture. A first portion (182) of the panel (52) extends into the mounting flange aperture and may redirect a leakage flow, if any, to limit an effect of leakage upon resonator performance.

    摘要翻译: 一种包括面板(52)和容器(82)的涡轮发动机谐振器(80)。 面板(52)沿着发动机内的流动路径并且具有孔(72)。 容器(82)具有固定到面板(52)的安装凸缘(92)。 凸缘(92)具有与面板(52)的孔(72)配合的孔。 容器(82)具有固定到安装凸缘(92)的主体,主体的内部与凸缘孔连通。 面板(52)的第一部分(182)延伸到安装凸缘孔中,并且可以重定向泄漏流(如果有的话),以限制泄漏对谐振器性能的影响。

    Acoustic liner with bypass cooling
    7.
    发明公开
    Acoustic liner with bypass cooling 有权
    Akustische Auskleidung mit Bypass-Kühlung

    公开(公告)号:EP1811143A2

    公开(公告)日:2007-07-25

    申请号:EP06252993.8

    申请日:2006-06-09

    IPC分类号: F01N1/14 F01N1/02 F01N1/08

    摘要: An acoustic liner (20) includes a remote panel (26), a proximate panel ( 28 ) transversely spaced from the remote panel ( 26 ) and a resonator chamber ( 34b ) residing between the panels ( 22 , 26 ). Perforations ( 38 ) penetrate the proximate panel ( 22 ) in registration with the resonator chamber ( 34b ). A neck ( 56 ) with an inlet ( 58 ) recessed from the proximate panel ( 22 ) establishes communication between the chamber ( 34b ) and a fluid stream ( G ) flowing past the proximate panel ( 22 ). A bypass coolant passage ( 66 ) guides coolant through the perforations ( 38 ) without guiding it through the resonator chamber ( 34b ).

    摘要翻译: 声学衬垫(20)包括远程面板(26),与远程面板(26)横向间隔开的邻近面板(28)和位于面板(22,26)之间的谐振室(34b)。 穿孔(38)穿过邻近的面板(22)与谐振腔(34b)对准。 具有从邻近面板(22)凹入的入口(58)的颈部(56)建立了腔室(34b)和流过邻近面板(22)的流体流(G)之间的连通。 旁路冷却剂通道(66)引导冷却剂穿过穿孔(38)而不引导冷却剂通过谐振腔(34b)。