Patents by Inventor Alain Alphonse Léopold Thomas

Alain Alphonse Léopold Thomas 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).

  • Process and device for attenuating the noise made in a turbomachine by rotor/stator interaction
    Patent number: 6546734
    Abstract: A process for attenuating noise generated in a turbomachine by the interaction of rotor blades with stator vanes downstream of the rotor blades comprises the injection of a fluid in continuous jets upstream of the blades through a number of orifices equal to the number of vanes. The orifices are arranged in a ring and are capable of pivoting about the rotor axis by an angle at least equal to the angular pitch between two consecutive vanes. The angular position is controlled so that the sound waves produced by the interaction between the jets and the blades are of opposite phase to those produced by the interaction of the blades with the vanes.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: April 15, 2003
    Assignee: SNECMA Moteurs
    Inventors: Angélique Hélène Antoine, Eric Jean-Louis Bouty, Alain Alphonse Léopold Thomas
  • Process and device for attenuating the noise made in a turbomachine by rotor/stator interaction
    Publication number: 20020048511
    Abstract: A process for attenuating noise generated in a turbomachine by the interaction of rotor blades with stator vanes downstream of the rotor blades comprises the injection of a fluid in continuous jets upstream of the blades through a number of orifices equal to the number of vanes. The orifices are arranged in a ring and are capable of pivoting about the rotor axis by an angle at least equal to the angular pitch between two consecutive vanes. The angular position is controlled so that the sound waves produced by the interaction between the jets and the blades are of opposite phase to those produced by the interaction of the blades with the vanes.
    Type: Application
    Filed: September 21, 2001
    Publication date: April 25, 2002
    Applicant: SNECMA MOTEURS
    Inventors: Angelique Helene Antoine, Eric Jean-Louis Bouty, Alain Alphonse Leopold Thomas