Blade for reducing the drag movements of said blade and method for reducing such a drag movement

摘要

A blade has a resonator to reduce the drag movements (F1,F2) of the blade subjected to primary drag force (C1') by generating secondary Coriolis forces (C1,C2) opposing the drag force. The resonator includes a movable heavy element such as a solid cylinder and a resilient retainer secured to the heavy element and the blade. The resonator further includes a guide incorporated in the blade and along the blade longitudinal direction. The guide makes the heavy element capable of longitudinally oscillating movements (F1',F2'). An independent claim is also included for a method of reducing the drag movements of a blade.