Navier-Stokes computational fluid dynamics calculations are presented for isolated, half-span, and full-span V-22 tiltrotor hover configurations. These computational results extend the validity of CFD hover methodology beyond conventional rotorcraft applications to tiltrotor configurations. Computed steady-state, isolated rotor performance agrees well with experimental measurements, showing little sensitivity to grid resolution. However, blade-vortex interaction flowfield details are sensitive to numerical dissipation and are more difficult to model accurately. Time-dependent, dynamic, half- and full-span installed configurations show sensitivities in performance to the tiltrotor fountain flow. As such, the full-span configuration exhibits higher rotor performance and lower airframe download than the half-span configuration. Half-span rotor installation trends match available half-span data, and airframe downloads are reasonably well predicted. Overall, the CFD solutions provide a wealth of flowfield details that can be used to analyze and improve tiltrotor aerodynamic performance.


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    Titel :

    CFD Simulations of Tiltrotor Configurations in Hover


    Beteiligte:

    Kongress:

    American Helicopter Society Forum ; 2002 ; Montreal, Quebec, Canada


    Erscheinungsdatum :

    2002-01-01


    Medientyp :

    Preprint


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    CFD Simulations of Tiltrotor Configurations in Hover

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    CFD Simulations of Tiltrotor Configurations in Hover

    M. A. Potsdam / R. C. Strawn | NTIS | 2002


    CFD Simulations of Tiltrotor Configurations in Hover

    Potsdam, Mark A. | Online Contents | 2005



    Tiltrotor Download in hover

    Prouty, R.W. | Tema Archiv | 1993