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.
CFD Simulations of Tiltrotor Configurations in Hover
2002
17 pages
Report
No indication
English
CFD Simulations of Tiltrotor Configurations in Hover
NTIS | 2002
|CFD Simulations of Tiltrotor Configurations in Hover
NTRS | 2002
|CFD Simulations of Tiltrotor Configurations in Hover
Online Contents | 2005
|Tema Archive | 1993
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