CPC F02C 9/22 (2013.01) [F01D 11/24 (2013.01); F05D 2220/323 (2013.01); F05D 2270/02 (2013.01)] | 12 Claims |
1. A method for controlling a clearance control valve of a turbomachine comprising:
during a maneuver to increase an engine speed in cruise phase, actuating a command to reduce an opening of the clearance control valve by a Full Authority Digital Engine Control based on a change in a state of a step-climb signal provided by a flight management system in order to increase clearances at tips of the turbomachine blades,
wherein when the maneuver to increase the engine speed is followed by a slow action or no action at all of a pilot, an increase in the opening of the clearance control valve follows its reduction, at an expiry of either of the following two time limits: a first time limit starting at the change in the state of the step-climb signal and determined not to penalize performance of the engine for too long and a second time limit starting at an end of said maneuver and determined as a function of a thermal time constant of a casing.
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