Flutter sensing and control system for a gas turbine engine

摘要

A gas turbine engine system (10) includes a nacelle (26), a fan casing (28) within the nacelle (26), a variable area fan nozzle (40), a sensor (52) and a controller (54). The sensor (52) detects an airfoil flutter condition. The controller (54) communicates with the sensor (52) and is operable to move the variable area fan nozzle (40) to influence a discharge airflow area (36, 37) in response to the detection of the airfoil flutter condition.