Increasingly demanding community noise targets are promoting noise performance ever higher on the list of airliner design drivers. In response, significant noise reductions are being made, though at a declining rate - it appears that a whole airframe approach is now needed to achieve significant further gains. As a possible step in this direction, over-wing engine installations are considered here, which use the airframe itself as a noise shield. The paper is the account of an experimental investigation of the comparative shielding performances of a range of relative engine positions on such a layout Using the statistical modelling technique Kriging, we build an approximation of the noise shielding metric as a function of the position of the engines above the wing - this can serve as the input to multi-disciplinary design trade-off studies. We then compare the results found with the results of applying simple half-barrier diffraction theory to the same problem. We conclude that the latter could be considered as a first order, conceptual design tool, though it misses certain features of the design merit landscape identified by the experiment presented here.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Fan broadband noise shielding for over-wing engines


    Weitere Titelangaben:

    Breitbandige Lärmabschirmung des Fans bei Triebwerken über dem Flügel


    Beteiligte:
    Powell, Stephen (Autor:in) / Sobester, Andras (Autor:in) / Joseph, Phillip (Autor:in)

    Erschienen in:

    Journal of Sound and Vibration ; 331 , 23 ; 5054-5068


    Erscheinungsdatum :

    2012


    Format / Umfang :

    15 Seiten, 20 Bilder, 21 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Fan broadband noise shielding for over-wing engines

    Powell, Stephen | Online Contents | 2012


    Noise shielding effects for engine-over-wing installations

    CONTICELLI, V. / DI BLASI, A. / OKEEFE, J. | AIAA | 1975


    Shielding of Turbomachinery Broadband Noise from a Hybrid wing Body Aircraft Configuration

    Hutcheson, Florence V. / Brooks, Thomas F. / Burley, Casey L. et al. | AIAA | 2014



    Noise Reduction Potential of Large, Over-the-Wing Mounted, Advanced Turbofan Engines

    Berton, J. J. / International Society for Air Breathing Engines | British Library Conference Proceedings | 1999