Patents by Inventor Gilles Rahier

Gilles Rahier has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for reducing blade-vortex interaction noise generated by a rotary wing
    Patent number: 6461106
    Abstract: The present invention relates to a method for reducing the blade-vortex interaction noise of rotary wings. According to the invention: at least one value &PSgr;o of the azimuth of the blades (1) is determined, for which value said blades shed tip vortices giving rise to a peak intensity of noise; a trailing edge flap (2) is disposed on each blade (1), the former generating an auxiliary vortex (11), parallel to the tip vortex (10) and attached to a blade section (8) lying between the blade section (7) around which the speed circulation is a maximum and the tip section (3) of said blade; and a deflection is applied to each of said flaps (2) such that, for said value &PSgr;o, the speed circulation around said blade section (8) is a specified fraction of the maximum speed circulation.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: October 8, 2002
    Assignee: ONERA (Office National d'Etudes et de Recherches Aerospatiales)
    Inventor: Gilles Rahier