Papers Published

  1. Quackenbush, T.R. and Bliss, D.B. and Lam, C.-M.G. and Katz, A., New vortex/surface interaction methods for the prediction of wake-induced airframe loads, Annual Forum Proceedings - American Helicopter Society, vol. 2 (1990), pp. 1099 - 1110 .
    (last updated on 2007/04/09)

    Abstract:
    The model incorporates a variety of recently-developed tools for the analysis of vortex dynamics and vortex/surface interaction, including a full-span free wake model of the rotor coupled to a panelled body, as well as new methods for the prediction of surface pressures due to close vortex interactions based on Analytical Numerical Matching (ANM). Correlation studies with measured rotor flow fields are presented that establish the success of the free wake model in capturing flow fields near rotor/body combinations. Model problems are solved to demonstrate the ability of the methods to predict inviscid vortex/surface interactions accurately and with greater efficiency than traditional methods. Finally, fundamental studies of curved filament dynamics near a flat surface are described.

    Keywords:
    Aerodynamics - Vortex Flow;Surfaces - Pressure Effects;Flow of Fluids - Wakes;Hydrodynamics - Fluid Structure Interaction;Mathematical Techniques - Numerical Methods;