The noise-attenuating device, such as an acoustic liner for an aircraft engine nacelle (fig 3), has a perforated facing sheet 36 with a coating 48 applied thereto. The coating defines an exposed surface for direct exposure to the environment in which noise attenuation is desired. By extending into the holes 44 the coating also defines a flared or bell-mouth-shaped entrance to one or more of the holes. The diameter of the holes may lie in the range 0.5 – 2.0 mm and the coating thickness may lie in the range 0.1 – 0.4 mm. The coating thickness may lie in the range between 5% and 20% of the hole diameter.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Noise-attenuating device and method of manufacture


    Beteiligte:

    Erscheinungsdatum :

    07.04.2021


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    F02C Gasturbinenanlagen , GAS-TURBINE PLANTS / B64C AEROPLANES , Flugzeuge / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES



    NOISE-ATTENUATING DEVICE AND METHOD OF MANUFACTURE

    DONNAN CLARK JAMES / NEWMAN RICHARD | Europäisches Patentamt | 2020

    Freier Zugriff

    METHOD FOR MANUFACTURING NOISE ATTENUATING DEVICES

    SIMPSON DEREK / MILLAR TONY | Europäisches Patentamt | 2020

    Freier Zugriff

    TIRE FOR ATTENUATING ROLLING NOISE

    DAUTREY NICOLAS / NAKASHIMA YASUFURNI | Europäisches Patentamt | 2018

    Freier Zugriff

    PYLON WITH NOISE ATTENUATING FAIRING

    ATEN MICHAEL | Europäisches Patentamt | 2016

    Freier Zugriff

    TIRE FOR ATTENUATING ROLLING NOISE

    DAUTREY NICOLAS / NAKASHIMA YASUFUMI | Europäisches Patentamt | 2016

    Freier Zugriff