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    Acoustic attenuating liner and method of making same
    11.
    发明授权
    Acoustic attenuating liner and method of making same 失效
    声衰减衬垫及其制作方法

    公开(公告)号：US5151311A

    公开(公告)日：1992-09-29

    申请号：US611633

    申请日：1990-11-13

    Applicant: Charles A. Parente ,  Sonya J. Westerback

    Inventor： Charles A. Parente ,  Sonya J. Westerback

    IPC: B32B3/12 ,  F16F9/30 ,  G10K11/172

    CPC classification number: F16F9/306 ,  B32B3/12 ,  G10K11/172 ,  Y10T428/24149 ,  Y10T428/24331

    Abstract: An acoustic attenuating liner has a non-metallic honeycomb core bonded on a backsheet. A corrosion-insulated perforated sheet is bonded to the honeycomb core by adhesive between the perforated sheet and the core. A mesh woven form corrosion-resistant metal is bonded to the perforated sheet by additional adhesive between the mesh and the perforated sheet for bonding said mesh to said perforated sheet. The additional adhesive has predetermined characteristics including a minimum viscosity of 1000 poises during curing.

    Abstract translation: 声衰减衬垫具有粘合在底片上的非金属蜂窝芯。 通过多孔板和芯之间的粘合剂将防腐绝缘的多孔板粘合到蜂窝芯上。 网状织物形成的耐腐蚀金属通过网和穿孔板之间的附加粘合剂结合到穿孔板上，用于将所述网粘合到所述穿孔板上。 附加粘合剂具有预定特性，包括固化期间最小粘度为1000泊。

    Noise suppression system for a jet engine
    13.
    发明授权
    Noise suppression system for a jet engine 失效
    喷气发动机噪声抑制系统

    公开(公告)号：US5721402A

    公开(公告)日：1998-02-24

    申请号：US709893

    申请日：1996-09-09

    Applicant: Charles A. Parente

    Inventor： Charles A. Parente

    IPC: B64C1/40 ,  B64C21/02 ,  B64C21/04 ,  B64C21/06 ,  B64D33/02 ,  B64D33/04 ,  F02C7/045 ,  F02K1/00 ,  F02K1/34 ,  F02K1/82

    CPC classification number: F02K1/827 ,  B64C21/04 ,  B64C21/06 ,  B64D33/02 ,  B64D33/06 ,  F02C7/045 ,  B64C2230/04 ,  B64C2230/14 ,  B64C2230/22 ,  B64D2033/0206 ,  B64D2033/0226 ,  B64D2033/026 ,  B64D2033/0286 ,  Y02T50/166 ,  Y02T50/672

    Abstract: A noise suppression system for a jet engine, the system having a substrate formed of open cell material, a layer of microporous material covering at least a portion of one surface of the substrate, a layer of substantially non-porous material covering at least one portion of an opposite surface of the substrate, and a pressurized air source for providing pressurized air to the substrate. The substrate, the microporous material, and the non-porous material are configured to define an inner surface of an inlet for the jet engine. The pressurized air is communicated from the substrate, through the microporous material, and into the inlet so as to provide a layer of less turbulent airflow along the inner surface of the inlet, thus mitigating noise generation.

    Abstract translation: 一种用于喷气发动机的噪声抑制系统，该系统具有由开孔模块材料形成的衬底，覆盖衬底的一个表面的至少一部分的微孔材料层，覆盖至少一部分的基本无孔材料层 基板的相对表面，以及用于向基板提供加压空气的加压空气源。 衬底，微孔材料和无孔材料被构造成限定用于喷气发动机的入口的内表面。 加压空气从衬底通过微孔材料连通并进入入口，以便沿入口的内表面提供较少湍流的气流层，从而减轻噪声的产生。

    Multi-degree linear liner impedance testing device
    14.
    发明授权
    Multi-degree linear liner impedance testing device 失效
    多级线性线性阻抗测试装置

    公开(公告)号：US5377546A

    公开(公告)日：1995-01-03

    申请号：US827606

    申请日：1992-01-29

    Applicant: Noe Arcas ,  Shepard G. Kay ,  Charles A. Parente

    Inventor： Noe Arcas ,  Shepard G. Kay ,  Charles A. Parente

    IPC: G01H15/00 ,  G01N29/11 ,  G01N29/22 ,  G01N29/00

    CPC classification number: G01H15/00 ,  G01N29/11 ,  G01N29/223 ,  G01N2291/02441 ,  G01N2291/045

    Abstract: A device for permitting evaluation of the acoustic impedance of liner designs used to attenuate noise in engine aircraft inlet and exhaust ducts, and in particular multiple degree of freedom designs of the type which include a porous facesheet followed by a backing depth followed by successive facesheet/backing depth combinations, includes a plurality of spacers of different thicknesses for varying the backing depths, and a movable plunger with a threaded adjustment mechanism for establishing the final backing depth. Gaskets and seals are installed at various interfaces to eliminate noise leakage paths. Two attachment bolts are used to hold the plunger assembly, face sheets, and spacers together, and an alignment disc positioned on the first facesheet is used to properly align an impedance tube waveguide on facesheet.

    Abstract translation: 一种用于允许评估用于衰减发动机飞机入口和排气管道中的噪声的衬套设计的声阻抗的装置，并且特别是包括多孔面板，随后是背衬深度，随后是连续的面板/ 背衬深度组合包括多个用于改变背衬深度的不同厚度的间隔物，以及具有用于建立最终背衬深度的螺纹调节机构的可移动柱塞。 垫圈和密封件安装在各种接口处，以消除噪声泄漏路径。 使用两个连接螺栓来将柱塞组件，面板和间隔件保持在一起，并且使用位于第一面板上的对准盘来将阻抗管波导适当地对准在面板上。

    Acoustic liner
    15.
    发明授权
    Acoustic liner 失效
    声衬

    公开(公告)号：US5025888A

    公开(公告)日：1991-06-25

    申请号：US371399

    申请日：1989-06-26

    Applicant: Noe Arcas ,  Charles A. Parente

    Inventor： Noe Arcas ,  Charles A. Parente

    IPC: B64C1/40 ,  F02K1/82 ,  G10K11/172

    CPC classification number: G10K11/172 ,  F02K1/827 ,  B64D2033/0286 ,  Y02T50/672

    Abstract: An acoustic liner comprising a sound permeable inside plate forming a first closed annulus, and a sound impermeable outside plate forming a second closed annulus located outside of and extending around the first closed annulus. The inside and outside plates are spaced apart and thus form an annular chamber therebetween; and a core member is secured in this annular chamber, between the inside and outside plates. The core member forms or has the shape of a sine wave form annularly extending around the inside plate, and the core member and the inside plate form a multitude of varying depth sound absorption chambers to attenuate sound waves over a broad band of frequencies.

    Abstract translation: 包括形成第一闭环的透声内板的声学衬垫和形成位于第一闭环之外并围绕第一闭环的第二闭环的不透声外板。 内板和外板间隔开，从而在它们之间形成环形室; 并且芯构件固定在该环形室中，内外板之间。 芯构件形成或具有围绕内板环形延伸的正弦波形状，并且芯构件和内板形成多个变化的深度吸声室，以在宽频带上衰减声波。

    Method and apparatus for determining flow resistance of fully assembled acoustic liners
    16.
    发明授权
    Method and apparatus for determining flow resistance of fully assembled acoustic liners 失效
    用于确定完全组装的声学衬垫的流动阻力的方法和装置

    公开(公告)号：US4768379A

    公开(公告)日：1988-09-06

    申请号：US890999

    申请日：1986-07-25

    Applicant: Noe Arcas ,  Joseph P. Gow ,  Charles A. Parente

    Inventor： Noe Arcas ,  Joseph P. Gow ,  Charles A. Parente

    IPC: G01N29/00 ,  G01H15/00 ,  G01N29/11 ,  G01N29/22 ,  G01N29/04

    CPC classification number: G01N29/11 ,  G01H15/00 ,  G01N29/223 ,  G01N2291/02863 ,  G01N2291/02872

    Abstract: Apparatus and method for determining the steady state flow resistance of face sheets on fully assembled acoustic duct liners. Resistance is measured by subjecting the liner to a sinusoidal acoustic pressure field at the face sheet surface. The pressure field is applied through a cylindrical waveguide and is measured by a pressure transducer flush mounted on the inside of the waveguide near the liner face. A second pressure measurement, obtained by a similar transducer positioned further from the face, is combined with the first measurement to calculate the acoustic resistance for the excitation frequency. If the excitation frequency coincides with the resonant frequency of the liner configuration, then no significant pressure exists on the back surface of the liner face sheet. For this condition the root mean square (rms) pressure measured at the face sheet is equated to the static pressure drop used to obtain the steady state flow resistance. The rms velocity of the oscillating pressure wave is calculated from the ratio of the rms pressure to resistance. A repetition of the procedure for several magnitudes of dynamic pressure permits the development of a curve which describes the non-linear characteristics of resistance with changes in velocity. This curve may be equated to a similar curve obtained using steady state flow resistance measurements of the liner in its partially assembled state without a backing surface.

    Abstract translation: 用于确定完全组装的声管衬套上的面板的稳态流动阻力的装置和方法。 电阻是通过对衬片进行面板表面的正弦声压场测量的。 压力场通过圆柱形波导管施加，并通过平行安装在靠近衬垫面的波导内侧的压力传感器来测量。 通过距表面更远的类似换能器获得的第二压力测量与第一测量结合以计算激发频率的声阻。 如果激发频率与衬套结构的谐振频率一致，则衬垫面板的背面上没有明显的压力。 对于这种情况，在面板处测量的均方根（rms）压力等于用于获得稳态流动阻力的静压力降。 振荡压力波的均方根速度由均方根压力与电阻的比值计算。 对于几个动态压力的重复程序允许开发描述电阻随速度变化的非线性特性的曲线。 该曲线可以等于使用在其没有背衬表面的部分组装状态下的衬管的稳态流动阻力测量获得的类似曲线。

    Acoustical and structural microporous sheet
    17.
    发明授权
    Acoustical and structural microporous sheet 失效
    声结构微孔板

    公开(公告)号：US06248423B1

    公开(公告)日：2001-06-19

    申请号：US09368316

    申请日：1999-08-03

    Applicant: James A. Clarke ,  Charles A. Parente

    Inventor： James A. Clarke ,  Charles A. Parente

    IPC: B32B324

    CPC classification number: G10K11/161 ,  G10K11/172 ,  Y10T428/24273 ,  Y10T428/268

    Abstract: A microporous sheet having both acoustical and structural functionality and a process for producing the sheet. Construction of the sheet requires, first of all, providing a sheet capable of functioning as a structural element of a component. A laser device capable of producing a free electron laser beam is provided, and the free electron laser beam is directed to a surface of the sheet to penetrate the sheet at a plurality of sites and thereby form a plurality of apertures. These apertures are generally uniformly dispersed and of a size and number sufficient to enable the sheet to function as an acoustical noise suppressor while retaining capability of functioning as a structural element. Use of free electron laser technology permits formation of smooth-walled, circular or non-circular apertures tailored to exact geometry specifications controlled to a nanometer in size, and produces a microporous sheet having structural functionality while meeting acoustic requirements with clean, unclogged apertures and with low friction-to-surface and/or boundary-layer control airflow.

    Abstract translation: 具有声学和结构功能的微孔片材和制造片材的方法。 片材的结构首先需要提供能够作为组分的结构元件的片材。 提供能够产生自由电子激光束的激光装置，并且将自由电子激光束引导到片材的表面以在多个位置处穿透片材，从而形成多个孔。 这些孔通常是均匀分散的，并且其尺寸和数量足以使得片材能够用作声学噪声抑制器，同时保持作为结构元件的功能。 使用自由电子激光技术允许形成平滑壁，圆形或非圆形孔径，适合尺寸控制到纳米尺寸的精确几何规格，并产生具有结构功能的微孔片材，同时满足具有干净，未被堵塞的孔口的声学要求，并且 低摩擦到表面和/或边界层控制气流。

    Combined acoustic and anti-ice engine inlet liner
    20.
    发明授权
    Combined acoustic and anti-ice engine inlet liner 失效
    组合的声学和防冰引擎入口衬管

    公开(公告)号：US5841079A

    公开(公告)日：1998-11-24

    申请号：US962863

    申请日：1997-11-03

    Applicant: Charles A. Parente

    Inventor： Charles A. Parente

    IPC: B64C23/00 ,  F02C7/045 ,  F02C7/047 ,  B64D33/02 ,  B64D15/04

    CPC classification number: B64C23/00 ,  F02C7/045 ,  F02C7/047 ,  B64C2230/04 ,  B64C2230/06 ,  B64C2230/14 ,  B64C2230/16 ,  B64C2230/22 ,  B64D2033/0226 ,  Y02T50/166 ,  Y02T50/671

    Abstract: 058410796 In accordance with the present invention, in an air vehicle having a turbo engine including an inlet which receives intake airflow and is defined by an inner surface and a D-nose of the turbo engine, there is provided an inlet liner for improved acoustic, anti-ice and drag performance. The inlet liner is provided with a permeable acoustic layer formed to attenuate sound and defines the D-nose. The inlet liner is further provided with a pressurized fluid injecting device. The pressurized fluid injecting device is in fluid communication with the permeable acoustic layer and formed to inject fluid through the permeable acoustic layer at the D-nose to reduce drag of the intake airflow. The pressurized fluid injecting device is further formed to inject fluid through the permeable acoustic layer at a temperature sufficient to perform an anti-ice function at the D-nose.

    Abstract translation: 058410796根据本发明，在具有涡轮发动机的空气动力车辆中，该涡轮发动机包括容纳进气的入口并由涡轮发动机的内表面和D形鼻限定的入口，设置有用于改善声学， 防冰和拖曳性能。 入口衬里设置有形成为可衰减声音并限定D鼻的可渗透声层。 入口衬套还设置有加压流体注入装置。 加压流体注入装置与可渗透声层流体连通，形成为通过D鼻处的可渗透声层注入流体，以减少吸入气流的阻力。 加压流体注入装置进一步形成为在足以在D鼻处执行防冰功能的温度下通过可渗透声层注入流体。

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