The influence of blade-vortex vertical miss-distance and angle of attack on the helicopter blade-vortex mechanism of interaction is investigated using large-eddy simulation (LES). A large-eddy simulation is carried out for a quasi 3-D blade-vortex interaction (BVI) problem, for a subsonic flow M = 0.3 and a chord based Reynolds number of 1.3×106. Computations are carried out to investigate the influence of angle of attack (α = 0 0, α = 50, α = 100) on the aerodynamic coefficients and acoustic field. It was observed that the blade-vortex vertical miss distance and angle of attack has significant influence on the aerodynamic coefficients and acoustic field.

Additional Metadata
Conference 34th European Rotorcraft Forum 2008, ERF34
Citation
Ilie, M. (Marcel), Nitzsche, F, & Matida, E. (2008). Parametric investigations of blade-vortex interaction using large-eddy simulation. In 34th European Rotorcraft Forum 2008, ERF34 (pp. 2187–2196).