A progress report is given on the implications of inlet noise reduction on aircraft direct operating costs (DOC). It considers treated inlet rings, various other inlet noise reduction concepts, and forward-speed effects. The report was limited to relatively well-established approaches to inlet noise reduction, such as acoustic liners and fixed-geometry/high-subsonic-speed inlets which are the focus of considerable current research activity. All of the concepts discussed are of a "passive" nature, i.e., no moving parts or electrical feedback systems.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Advanced inlet duct noise reduction concepts


    Contributors:


    Publication date :

    1976-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English





    Survey of inlet noise reduction concepts for gas turbine engines

    Lansing, D. L. / Chestnutt, D. | NTRS | 1976


    Auxiliary power unit inlet duct assembly for mitigating noise

    LUCAS MIKE | European Patent Office | 2017

    Free access

    AUXILIARY POWER UNIT INLET DUCT ASSEMBLY FOR MITIGATING NOISE

    LUCAS MIKE | European Patent Office | 2017

    Free access

    Inlet duct screen assembly

    DEDE BRIAN C / VITALE JACK V / STENBERG JEFFREY V | European Patent Office | 2016

    Free access