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GAS TURBINE ENGINE VARIABLE AREA FAN NOZZLE WITH ICE MANAGEMENT

  • US 20130192247A1
  • Filed: 02/03/2012
  • Published: 08/01/2013
  • Est. Priority Date: 01/31/2012
  • Status: Active Grant
First Claim
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1. A method of managing a gas turbine engine variable area fan nozzle, comprising the steps of:

  • operating a variable area fan nozzle according to a first operating schedule;

    evaluating an icing condition input to determine the likelihood of ice presence;

    altering the first operating schedule, which provides a variable area fan nozzle position, if ice is likely present or actually present to provide an icing operating schedule different than the first operating schedule;

    adjusting the variable area fan nozzle position according to the icing operating schedule;

    a fan arranged in a fan nacelle including a flap configured to be movable between first and second positions;

    an actuator operatively coupled to the flap; and

    the gas turbine engine includes a Fan Pressure Ratio of less than about 1.45.

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