Patents by Inventor Paul Michael HIELD

Paul Michael HIELD 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 of starting a gas turbine engine
    Patent number: 10619573
    Abstract: A gas turbine engine comprises a compressor driven by a shaft, and a reference starting schedule, the compressor having a reference stability boundary, with the reference starting schedule defining a reference working line. A method of starting the gas turbine engine is described in which the method comprises the steps of: (i) accelerating the rotational speed of the shaft towards an engine idle speed; (ii) defining for the compressor, as the rotational speed increases, an operational working line; and (iii) modifying at least one operating parameter of the gas turbine engine as the rotational speed increases such that for a rotational speed, an operational working line is closer to the reference stability boundary than the reference working line is to the reference stability boundary.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: April 14, 2020
    Assignee: ROLLS-ROYCE plc
    Inventors: Paul Michael Hield, Richard John Tunstall, Caroline Louise Turner, Alexander Edward Henry Fitzhugh
  • METHOD OF STARTING A GAS TURBINE ENGINE
    Publication number: 20160138475
    Abstract: A gas turbine engine comprises a compressor driven by a shaft, and a reference starting schedule, the compressor having a reference stability boundary, with the reference starting schedule defining a reference working line. A method of starting the gas turbine engine is described in which the method comprises the steps of: (i) accelerating the rotational speed of the shaft towards an engine idle speed; (ii) defining for the compressor, as the rotational speed increases, an operational working line; and (iii) modifying at least one operating parameter of the gas turbine engine as the rotational speed increases such that for a rotational speed, an operational working line is closer to the reference stability boundary than the reference working line is to the reference stability boundary.
    Type: Application
    Filed: October 20, 2015
    Publication date: May 19, 2016
    Inventors: Paul Michael HIELD, Richard John TUNSTALL, Caroline Louise TURNER, Alexander Edward Henry FITZHUGH