Radiation from a lined duct in uniform flow

Peter Møller Juhl

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    Abstract

    This paper presents a boundary element formulation for modelling the sound field inside and outside a duct in uniform flow. The model is the first step towards models for predicting the noise radiated from turbo fan engines. For this purpose the frequency range is very large (up to ka=40), and non-axisymmetric excitation is important (spinning modes). In addition the model allows the duct to be partially or fully treated with an axisymmetric locally reacting liner. Results determined with the model are compared with results from the literature and results calculated with an analytic model.
    Original languageEnglish
    Title of host publicationProceedings of Sixth International Congress on sound and Vibration
    Place of PublicationLyngby
    PublisherDepartment of Acoustic Technology, Technical University of Denmark
    Publication date1999
    Pages595-602
    Publication statusPublished - 1999
    Event6th International Congress on Sound and Vibration - Kgs. Lyngby, Denmark
    Duration: 5 Jul 19998 Jul 1999
    Conference number: 6

    Conference

    Conference6th International Congress on Sound and Vibration
    Number6
    CountryDenmark
    CityKgs. Lyngby
    Period05/07/199908/07/1999

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