Unsteady aerodynamic characteristics of helicopter rotor operating in vortex ring state were experimentally investigated; time histories of thrust, torque, and rpm of rotor were measured by use of sensing devices, installed on shaft of rotor; results obtained show that in vortex ring state, thrust fluctuates violently, whereas torque fluctuates very little; induced power obtained from thrust and torque data was compared with that obtained from momentum theory; existence of periodicity in thrust fluctuation also was observed in some regions of vortex ring state.


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    Titel :

    Experiments on model helicopter rotor operating in vortex ring state


    Weitere Titelangaben:

    J Aircraft


    Beteiligte:
    Washizu, K. (Autor:in) / Azuma, A. (Autor:in) / Koo, J. (Autor:in) / Oka, T. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1966


    Format / Umfang :

    6 pages


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Induced flow variation of helicopter rotor operating in vortex ring state

    Azuma, A. / Obata, A. | Engineering Index Backfile | 1968




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