Disclosed is a flutter damper (102, 201), including a chamber (118, 202) having an internal space, a movable diaphragm (218) disposed at least partially within the chamber, the diaphragm separating the chamber into a first chamber (220) and a second chamber (230), the second chamber forming an acoustic volume, wherein a size of the acoustic volume configures the chamber for peak acoustical energy absorption at a frequency range that is associated with one or more fan flutter modes, and a biasing member (222) that moves the diaphragm responsive to a signal from an aircraft or engine electronic control (EEC) (236) unit, wherein movement of the diaphragm increases or reduces the size of the acoustic volume of the second chamber.


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    Title :

    VARIABLE DISPLACEMENT FLUTTER DAMPER FOR A TURBOFAN ENGINE


    Additional title:

    FLATTERDÄMPFER MIT VARIABLER VERDRÄNGUNG FÜR EIN MANTELSTROMTRIEBWERK
    AMORTISSEUR DE FLOTTEMENT À DÉPLACEMENT VARIABLE POUR UN MOTEUR DE TURBOSOUFFLANTE


    Contributors:

    Publication date :

    2021-11-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F02K JET-PROPULSION PLANTS , Strahltriebwerke / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F02C Gasturbinenanlagen , GAS-TURBINE PLANTS / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES



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