Jet noise is amplified at low frequencies when the jet is installed under a wing. Serrations are designed at the nozzle exit to mitigate installation noise generation. In this paper, hybrid large-eddy simulation (LES) and Reynolds-averaged Navier–Stokes (RANS) is performed to investigate the serration effects on installed jet flows and acoustics in an industrially relevant configuration: an ultra-high-bypass-ratio aeroengine mounted under a three-dimensional wing. The results show that the serrations are able to weaken jet and wing interactions, and consequently reduce far-field installation noise. The noise reduction mechanisms have been sought through the quadrupole sources in the jet plume and evanescent pressure wave scattering at the wing trailing edge.


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    Titel :

    LES–RANS Study of Serrated Nozzle Jet Aeroacoustics for an Installed Ultra-High-Bypass-Ratio Aeroengine


    Beteiligte:
    Wang, Zhong-Nan (Autor:in) / Tyacke, James C. (Autor:in) / Tucker, Paul G. (Autor:in)

    Erschienen in:

    AIAA Journal ; 59 , 10 ; 4155-4165


    Erscheinungsdatum :

    01.10.2021




    Medientyp :

    Aufsatz (Konferenz) , Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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