Blade wake interaction is defined as the broadband noise generated by the interaction of helicopter rotor blades with their own wake. Experimental observations have shown that this is a strong function of advance ratio and tip path plane angle. This paper describes how this noise source can be associated with the blade vortex interactions in the forward sector of the rotor. Measured levels of turbulence in the vortex core are used to predict the broadband noise levels with some success. However, more detailed information on the turbulence spectrum and the trajectory of the shed vortices is required before more accurate noise predictions can be made.


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    Title :

    The prediction of blade wake interaction noise based on a turbulent vortex model


    Additional title:

    Vorhersage der durch den Propellerwiderstand und seine Wechselwirkungen bedingten Geraeuschentwicklung fuer ein turbulentes Wirbelmodell


    Contributors:
    Glegg, S. (author)

    Published in:

    AIAA-Papers ; Apr ; 1-8


    Publication date :

    1988


    Size :

    8 Seiten, 11 Bilder, 15 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English