25th Congress of International Council of the Aeronautical Sciences, 3 - 8 September 2006, Hamburg, Germany
Paper ICAS 2006-3.8.3

INFLUENCES OF HELICOPTER ROTOR WAKE CHARACTERISTICS ON BLADE AIRLOADS

X. K. Zioutis, A. I. Spyropoulos, D. P Margaris, D. G. Papanikas
Univ. of Patras, Greece

Keywords: helicopter aerodynamics, rotor wake, core model

This work introduces specially developed computational models, which represent specific physical features of wake vortices in rotor simulations. The physical phenomena, investigated here, are vortex filaments consolidation, viscous vortex roll-up, tip-vortex diffusion and vortex filament straining because of geometry distortion. Comparisons with experimental data are included for several flight conditions.

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