An asymptotic analysis based on the Mach surface structure of the field of a supersonic helical source distribution is applied to predict thickness and loading noise radiated by high-speed propeller blades. The theory utilizes an integral representation of the Ffowcs Williams-Hawkings equation in a fully linearized form. The asymptotic results are used for chordwise strips of the blade, whereas required spanwise integrations are performed numerically. The form of the analysis enables predicted waveforms to be interpreted in terms of Mach surface propagation. A computer code developed to implement the theory is described and foundto yield results in close agreement with more exact computations.


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    Title :

    Asymptotic/numerical analysis of supersonic propeller noise


    Additional title:

    Asymptotische/numerische Analyse vom Propellergeräusch eines Überschallrotorblattes


    Contributors:
    Myers, M.K. (author) / Wydeven, R. (author)

    Published in:

    AIAA Journal ; 29 , 9 ; 1374-1382


    Publication date :

    1991


    Size :

    9 Seiten, 9 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Asymptotic/numerical analysis of supersonic propeller noise

    MYERS, M. K. / WYDEVEN, R. | AIAA | 1991


    Asymptotic/numerical analysis of supersonic propeller noise

    Myers, M. K. / Wydeven, R. | NTRS | 1991



    Asymptotic Theory of Supersonic Propeller Noise

    Envia, E. | Online Contents | 1994