Gas turbine engine variable area fan nozzle control
AssigneeUnited Technologies Corporation
InventorsGeoffrey T. Blackwell, William J. McVey, William G. Tempelman
Life of this patent
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Abstract
A method of managing a gas turbine engine includes the steps of detecting an airspeed and detecting a fan speed. A parameter relationship is referenced related to a desired variable area fan nozzle position based upon at least airspeed and fan speed. The detected airspeed and detected fan speed is compared to the parameter relationship to determine a target variable area fan nozzle position. An actual variable area fan nozzle position is adjusted in response to the determination of the target area fan nozzle position and at least one threshold.
Claims20
A method of managing a gas turbine engine comprising the steps of:
- detecting an airspeed;
- detecting a fan speed;
- referencing a parameter relationship related to a desired variable area fan nozzle position based upon at least airspeed and fan speed, and comparing the detected airspeed and detected fan speed to the parameter relationship to determine a target variable area fan nozzle position;
- and
- adjusting an actual variable area fan nozzle position in response to the determination of the target area fan nozzle position and at least one threshold.
A gas turbine engine comprising:
- a fan nacelle including a flap configured to be movable between first and second positions;
- an actuator operatively coupled to the flap;
- and
- a controller configured to reference a parameter relationship that relates to a desired variable area fan nozzle position based upon at least airspeed and fan speed, the controller configured to compare a detected airspeed and a detected fan speed to the parameter relationship to determine a target variable area fan nozzle position, and the controller configured to provide a command to the actuator to adjust the flap from a first position to the second position in response to the determination of the target variable fan nozzle position and at least one threshold.
Dependencies are inferred from the claim text.