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.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

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


    Contributors:

    Conference:

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


    Publication date :

    1991-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Adequacy of modeling turbulence and related effects on helicopter response

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


    Adequacy of modeling turbulence and related effects on helicopter response

    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 Archive | 1990