An acoustic panel comprises a core layer of honeycomb whose opposite sides are covered by face sheets each comprising a perforated metal plate and a sheet of metal cloth such as woven wire or metal felt. The perforated metal plates are bonded to the core and the metal cloth sheets form the outer surfaces of the panel. Each metal cloth sheet has an acoustic resistance of 5 to 300 Rayls. The perforated metal plates have an open area of about 20 to 40 percent in preferred embodiments. Noise in a nozzle is suppressed by disposing a plurality of the acoustic panels in the nozzle duct with the panels oriented radially and spaced apart about a circumference of the duct.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Acoustic sandwich panel with no septum and apparatus and method for suppressing noise in a turbojet nozzle


    Weitere Titelangaben:

    Akustische Sandwichplatte ohne Septum und Vorrichtung und Verfahren zur Rauschunterdrückung in einer Strahltriebdüse
    Panneau sandwich acoustique sans septum et appareil et procédé pour supprimer les bruits dans une tuyère de turboréacteur


    Beteiligte:

    Erscheinungsdatum :

    28.11.2018


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    F02K JET-PROPULSION PLANTS , Strahltriebwerke / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES



    ACOUSTIC PANEL WITH STRUCTURAL SEPTUM

    LACKO ANTHONY / PIERICK DAVID EDWARD / CHIEN WENTAUR EUGENE et al. | Europäisches Patentamt | 2022

    Freier Zugriff

    ACOUSTIC PANEL WITH STRUCTURAL SEPTUM

    LACKO ANTHONY / PIERICK DAVID EDWARD / CHIEN WENTAUR EUGENE et al. | Europäisches Patentamt | 2019

    Freier Zugriff

    Acoustic panel with structural septum

    LACKO ANTHONY / PIERICK DAVID EDWARD / CHIEN WENTAUR EUGENE et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    Turbojet engine noise reduction with mixing nozzle-ejector combinations

    Coles, Willard D. / Mihaloew, John A. / Callaghan, Edmund E. | TIBKAT | 1958


    Turbojet Engine Noise Reduction with Mixing Nozzle-ejector Combinations

    Coles, Willard D / Mihaloew, John A / Callaghan, Edmund E | NTRS | 1958