Sound attenuation panel for aircraft having a combination of acoustic attenuation properties

    公开(公告)号:US11459950B2

    公开(公告)日:2022-10-04

    申请号:US16379205

    申请日:2019-04-09

    Abstract: Sound attenuation panel for aircraft having a combination of acoustic attenuation properties. The acoustic panel includes an acoustic structure having a cellular structure and a resistive skin and a backing skin, the acoustic panel also including at least one auxiliary acoustic device with cavities that is configured to produce additional acoustic absorption, the auxiliary acoustic device with cavities being attached to the acoustic structure and including adjacent chambers or cavities separated by shared walls, each of the chambers or cavities having perforations and being adapted to produce acoustic absorption. The combination of the acoustic structure and the auxiliary acoustic device with cavities enables combination of the acoustic absorption properties of these two types of element and an increased range of frequencies of the noise that can be attenuated by the acoustic panel without increasing its overall size.

    Air Inlet Lip Of An Aircraft Engine Comprising A De-icing System

    公开(公告)号:US20190112065A1

    公开(公告)日:2019-04-18

    申请号:US16145367

    申请日:2018-09-28

    Abstract: An aircraft engine air inlet lip takes an annular form about a longitudinal axis and delimits an air inlet stream, and includes: a wall having a U-shaped profile having an outer face oriented towards outside of the air inlet lip and an inner face oriented towards interior of the air inlet lip, an inner wall extending inside the wall between two zones of the inner face, so as to close an inner chamber delimited between the wall and the inner wall and filled with a gas, the inner wall having an upstream face oriented towards and a downstream face oriented away from the inner chamber, a fan configured to move the gas contained in the inner chamber, and at least one pipeline fixed to the upstream face and extending all around the air inlet lip and configured to be fed with a heat transfer fluid heated by a heat source.

    Panel for the acoustic treatment comprising hot air ducts and at least one stabilization chamber
    14.
    发明授权
    Panel for the acoustic treatment comprising hot air ducts and at least one stabilization chamber 有权
    用于声学处理的面板包括热空气管道和至少一个稳定室

    公开(公告)号:US09388767B2

    公开(公告)日:2016-07-12

    申请号:US13573784

    申请日:2012-10-03

    Abstract: An aircraft nacelle comprising a lip extended by an inner conduit forming an air intake, a front frame delimiting with said lip an annular channel within which hot air flows and a panel for acoustic treatment having, from outside inwardly, an acoustic resistive layer, at least one honeycomb structure and a reflective layer as well as ducts for channeling hot air, each including one inlet communicating with the annular channel and one outlet communicating with the inner conduit, wherein the panel for acoustic treatment comprises at least a stabilization chamber in the form of an annular channel with a cross-section larger than that of the ducts which extends over at least a portion of the nacelle circumference and which communicates with a plurality of ducts, the inlets and outlets not being aligned in the longitudinal direction.

    Abstract translation: 一种飞机机舱,包括由形成进气口的内部管道延伸的唇缘,与所述唇缘一起限定热空气流动的环形通道的前框架和用于声学处理的面板,其外部至少从外部至少形成声阻层 一个蜂窝结构和反射层以及用于引导热空气的管道,每个管道包括与环形通道连通的一个入口和与内部管道连通的一个出口,其中用于声学处理的面板至少包括稳定室 环形通道,其横截面大于在所述机舱周边的至少一部分上延伸并且与多个管道连通的管道的横截面,所述入口和出口不在纵向方向上对齐。

    Air intake, nacelle and propulsion unit for monobloc sector aircraft

    公开(公告)号:US11661173B2

    公开(公告)日:2023-05-30

    申请号:US16507470

    申请日:2019-07-10

    CPC classification number: B64C7/02 B64D29/06 F01D25/24

    Abstract: An aircraft nacelle air intake includes sectors each having a lip forming portion, an outer panel forming portion and an inner panel forming portion. The outer panel forming portions and lip forming portions are formed by a continuous one-piece wall. At at least one junction between two adjacent sectors, an opening and a hatch are provided between the outer panel forming portions of the sectors. The inner panel forming portions and the lip forming portions of the sectors are edge to edge and fixed to each other by fixing devices accessible from the inside of the sectors and invisible from outside of the sectors. A maintenance method in which, when a zone of a sector is damaged, the sector concerned is removed as a whole and is replaced by a new of “recycled” sector is also described.

    Air intake structure of an aircraft nacelle

    公开(公告)号:US11427343B2

    公开(公告)日:2022-08-30

    申请号:US16560344

    申请日:2019-09-04

    Abstract: An air intake structure for an aircraft nacelle is disclosed. The air intake structure delimits a channel and includes a lip having a U-shaped cross section oriented towards the rear, a first sound-absorbing panel fixed behind the lip and delimiting the channel, and a second sound-absorbing panel fixed behind the first sound-absorbing panel and delimiting the channel. Each sound-absorbing panel includes a cellular core which is fixed between an inner skin pierced with holes and oriented towards the channel, and an outer skin oriented in the opposite direction, where the inner skin of the first sound-absorbing panel has a thickness greater than the thickness of the inner skin of the second sound-absorbing panel, and where each of the inner skins includes a heat source which is embedded in the mass of the inner skin.

    Air inlet lip of an aircraft engine comprising a de-icing system

    公开(公告)号:US11073081B2

    公开(公告)日:2021-07-27

    申请号:US16145367

    申请日:2018-09-28

    Abstract: An aircraft engine air inlet lip takes an annular form about a longitudinal axis and delimits an air inlet stream, and includes: a wall having a U-shaped profile having an outer face oriented towards outside of the air inlet lip and an inner face oriented towards interior of the air inlet lip, an inner wall extending inside the wall between two zones of the inner face, so as to close an inner chamber delimited between the wall and the inner wall and filled with a gas, the inner wall having an upstream face oriented towards and a downstream face oriented away from the inner chamber, a fan configured to move the gas contained in the inner chamber, and at least one pipeline fixed to the upstream face and extending all around the air inlet lip and configured to be fed with a heat transfer fluid heated by a heat source.

    AIR INTAKE, NACELLE AND PROPULSION UNIT FOR MONOBLOC SECTOR AIRCRAFT

    公开(公告)号:US20200017191A1

    公开(公告)日:2020-01-16

    申请号:US16507470

    申请日:2019-07-10

    Abstract: An aircraft nacelle air intake includes sectors each having a lip forming portion, an outer panel forming portion and an inner panel forming portion. The outer panel forming portions and lip forming portions are formed by a continuous one-piece wall. At at least one junction between two adjacent sectors, an opening and a hatch are provided between the outer panel forming portions of the sectors. The inner panel forming portions and the lip forming portions of the sectors are edge to edge and fixed to each other by fixing devices accessible from the inside of the sectors and invisible from outside of the sectors. A maintenance method in which, when a zone of a sector is damaged, the sector concerned is removed as a whole and is replaced by a new of “recycled” sector is also described.

    Panel for the acoustic treatment comprising hot air ducts and at least one stabilization chamber
    19.
    发明申请
    Panel for the acoustic treatment comprising hot air ducts and at least one stabilization chamber 有权
    用于声学处理的面板包括热空气管道和至少一个稳定室

    公开(公告)号:US20140001284A1

    公开(公告)日:2014-01-02

    申请号:US13573784

    申请日:2012-10-03

    Abstract: An aircraft nacelle comprising a lip extended by an inner conduit forming an air intake, a front frame delimiting with said lip an annular channel within which hot air flows and a panel for acoustic treatment having, from outside inwardly, an acoustic resistive layer, at least one honeycomb structure and a reflective layer as well as ducts for channeling hot air, each including one inlet communicating with the annular channel and one outlet communicating with the inner conduit, wherein the panel for acoustic treatment comprises at least a stabilization chamber in the form of an annular channel with a cross-section larger than that of the ducts which extends over at least a portion of the nacelle circumference and which communicates with a plurality of ducts, the inlets and outlets not being aligned in the longitudinal direction.

    Abstract translation: 一种飞机机舱,包括由形成进气口的内部管道延伸的唇缘,与所述唇缘一起限定热空气流动的环形通道的前框架和用于声学处理的面板,其外部至少从外部至少形成声阻层 一个蜂窝结构和反射层以及用于引导热空气的管道,每个管道包括与环形通道连通的一个入口和与内部管道连通的一个出口,其中用于声学处理的面板至少包括稳定室 环形通道,其横截面大于在所述机舱周边的至少一部分上延伸并且与多个管道连通的管道的横截面,所述入口和出口不沿纵向排列。

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