Patents by Inventor Azad A. Ladhani

Azad A. Ladhani 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).

  • Rotor bore and turbine rotor wheel/spacer heat exchange flow circuit
    Patent number: 6382903
    Abstract: In a turbine having closed-circuit steam-cooling passages about the rim of the rotor during steady-state operation, compressor discharge air is supplied to the rotor bore for passage radially outwardly into the wheel space cavities between the wheels and spacers. Communicating slots and channels in the spacers and wheels at circumferentially spaced positions enable egress of the compressor discharge air into the hot gas flow path. At turbine startup, cooling air flows through the closed-circuit steam passages to cool the outer rim of the rotor while compressor discharge air pre-warms the wheels and spacers. At steady-state, cooling steam is supplied in the closed-circuit steam-cooling passages and compressor discharge air is supplied through the bore and into the wheel space cavities to cool the rotor.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: May 7, 2002
    Assignee: General Electric Company
    Inventors: Philip M. Caruso, Sacheverel Quentin Eldrid, Azad A. Ladhani, Alan Richard DeMania, Gene David Palmer, Ian David Wilson, Lisa Shirley Rathbun, Robert Craig Akin