Abstract
The unsteady flowfield of a Bell-Agusta 609 rotor is numerically investigated with an unsteady Reynolds-averaged Navier-Stokes flow solver based on unstructured grid topology. The geometry considered is a three-bladed rotor that is undergoing a higher harmonic blade-pitch oscillation. Methodology is presented to model the multiblade cyclic motion that is superimposed on the basic motion. The unsteady airloads and blade-vortex interaction phenomenon are investigated for hovering and forward flight conditions. Numerical simulations indicate a significant impact of the blade-pitch oscillation on the tip-vortex structure and associated blade-vortex interaction.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call