The present closed-form solution of a frequency-time spectrum for the dominant vertical turbulence velocity at an arbitrary blade station accounts for the instantaneous turbulence-energy transfer due to rotational velocity from the low-frequency to the high-frequency region, with the occurrence of several spectral peaks and split peaks. Comparisons of blade-flapping response to blade- and body-fixed turbulence is also presented, over a range of turbulence-scale length and advance ratios. Attention is given to the use of cyclostationary turbulence and blade-response frequency-time spectra to simultaneously predict temporal and frequency characteristics. Rotational velocity substantially affects response statistics in low-altitude, low advance-ratio flight.


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    Titel :

    On the adequacy of modeling turbulence and related effects on helicopter response


    Beteiligte:
    George, V. V. (Autor:in) / Gaonkar, G. H. (Autor:in) / Prasad, J. V. R. (Autor:in) / Schrage, D. P. (Autor:in)

    Kongress:

    AHS International Specialists'' Meeting on Rotorcraft Basic Research ; 1991 ; Atlanta, GA, United States


    Erscheinungsdatum :

    01.01.1991


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch




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    GEORGE, V. V. / GAONKAR, G. H. / PRASAD, J. V. R. et al. | AIAA | 1992


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    George, V. V. / Gaonkar, G. H. / Prasad, J. V. R. et al. | NTRS | 1992


    Helicopter response to atmospheric turbulence in forward flight

    Elliott, A.S. / Chopra, I. | Tema Archiv | 1990