For low speed rotors, it is shown that unsteady load models are only partially successful in predicting experimental levels. A theoretical model is presented which leads to the concept of unsteady thickness noise. This gives better agreement with test results. For high speed rotors, it is argued that present models are incomplete and that other mechanisms are at work. Some possibilities are briefly discussed.


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    Titel :

    Theoretical models of helicopter rotor noise


    Beteiligte:


    Erscheinungsdatum :

    01.08.1978


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Helicopter rotor thickness noise

    DAHAN, C. / GRATIEUX, E. | AIAA | 1980


    Helicopter Rotor Thickness Noise

    Claude Dahan / Edmond Gratieux | AIAA | 1981


    Helicopter rotor thickness noise

    Dahan, C. / Gratieux, E. | Tema Archiv | 1980


    Helicopter tail rotor noise

    CHOU, S.-T. / GEORGE, A. | AIAA | 1986


    Helicopter rotor noise generation.

    Leverton, J. W. / Wright, S. E. | NTRS | 1969