Noise attenuation structures, such as acoustic liners for gas turbine engines, are provided. For example, an acoustic liner comprises a face sheet, a backing sheet spaced apart from the face sheet, and a plurality of cavities defined between the face and backing sheets. The cavities are defined by cavity walls. A plurality of backing sheet walls extends from the backing sheet toward the face sheet. The backing sheet walls extend adjacent the cavity walls, and the backing sheet is movable with respect to the face sheet such that the cavities have a variable depth. Other embodiments of noise attenuation structures also are provided.


    Access

    Download


    Export, share and cite



    Title :

    Noise attenuation structures



    Publication date :

    2020-06-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F02C Gasturbinenanlagen , GAS-TURBINE PLANTS / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F02K JET-PROPULSION PLANTS , Strahltriebwerke



    NOISE ATTENUATION STRUCTURES

    PASTOUCHENKO NIKOLAI N / CHEUNG LAWRENCE CHIH-HUI / PALIATH UMESH et al. | European Patent Office | 2019

    Free access

    NOISE ATTENUATION PANEL

    ROGGEVEEN MARCEL / GIJSEMAN REMCO / WONG WILSON | European Patent Office | 2019

    Free access

    Noise attenuation panel

    ROGGEVEEN MARCEL / GIJSEMAN REMCO / WONG WILSON | European Patent Office | 2023

    Free access

    Noise attenuation panel

    MARCEL ROGGEVEEN / REMCO GIJSEMAN / WILSON WONG | European Patent Office | 2020

    Free access

    NOISE ATTENUATION PANEL

    ROGGEVEEN MARCEL / GIJSEMAN REMCO / WONG WILSON | European Patent Office | 2019

    Free access