GAS TURBINE ENGINE WITH FAN VARIABLE AREA NOZZLE, NACELLE ASSEMBLY AND METHOD OF VARYING AREA OF A FAN NOZZLE

摘要

A turbofan engine includes a fan variable area nozzle, which includes a louver system having a multiple of slats generally transverse to the engine axis. Each of the louver slats are pivotally mounted to the fan nacelle to vary the effective area of the fan nozzle exit area and permit efficient engine operation at predefined pressure ratios.