Patents by Inventor William Nathan Alexander

William Nathan Alexander 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).

  • Noise Reduction Surface Treatment for Airfoil
    Publication number: 20220195980
    Abstract: The present invention relates to airfoils having surface treatments to reduce trailing edge noise. The surface treatment is designed to reduce trailing edge noise by modifying the boundary layer turbulence as it approaches the trailing edge. The surface treatment accomplishes its function by breaking up spanwise-oriented turbulence approaching the trailing edge, thereby reducing the spanwise correlation lengthscales; deflecting the boundary layer turbulence away from the edge; and/or creating spanwise vortices or instability waves to reduce the turbulence-edge interaction.
    Type: Application
    Filed: January 8, 2022
    Publication date: June 23, 2022
    Applicant: Virginia Tech Intellectual Properties, Inc.
    Inventors: William Nathan Alexander, William J. Devenport, Ian A. Clark, Justin W. Jaworski, Stewart Glegg, Nigel Peake, Conor Daly
  • Noise Reduction Surface Treatment for Airfoil
    Publication number: 20210079883
    Abstract: The present invention relates to airfoils having surface treatments to reduce trailing edge noise. The surface treatment is designed to reduce trailing edge noise by modifying the boundary layer turbulence as it approaches the trailing edge. The surface treatment accomplishes its function by breaking up spanwise-oriented turbulence approaching the trailing edge, thereby reducing the spanwise correlation lengthscales; deflecting the boundary layer turbulence away from the edge; and/or creating spanwise vortices or instability waves to reduce the turbulence-edge interaction.
    Type: Application
    Filed: January 31, 2020
    Publication date: March 18, 2021
    Applicant: Virginia Tech Intellectual Properties, Inc.
    Inventors: William Nathan Alexander, William J. Devenport, Ian A. Clark, Justin W. Jaworski, Stewart Glegg, Nigel Peake, Conor Daly
  • Noise Reduction Surface Treatment for Airfoil
    Publication number: 20170122286
    Abstract: The present invention relates to airfoils having surface treatments to reduce trailing edge noise. The surface treatment is designed to reduce trailing edge noise by modifying the boundary layer turbulence as it approaches the trailing edge. The surface treatment accomplishes its function by breaking up spanwise-oriented turbulence approaching the trailing edge, thereby reducing the spanwise correlation lengthscales; deflecting the boundary layer turbulence away from the edge; and/or creating spanwise vortices or instability waves to reduce the turbulence-edge interaction.
    Type: Application
    Filed: October 7, 2014
    Publication date: May 4, 2017
    Applicant: Virginia Tech Intellectual Properties, Inc.
    Inventors: William Nathan Alexander, William J. Devenport, Ian A. Clark, Justin W. Jaworski, Stewart Glegg, Nigel Peake, Conor Daly