초록 ▼

A turbofan engine includes a fan variable area nozzle having a multiple of vents through a fan nacelle and rotatable elements rotatable within the vents by an actuator system. Rotation of the rotatable element within each vent changes the effective area of the fan nozzle exit area to permit efficien

A turbofan engine includes a fan variable area nozzle having a multiple of vents through a fan nacelle and rotatable elements rotatable within the vents by an actuator system. Rotation of the rotatable element within each vent changes the effective area of the fan nozzle exit area to permit efficient operation at a multiple of flight conditions.

대표청구항 ▼

What is claimed is: 1. A nacelle assembly for a gas turbine engine comprising:a core nacelle defined about an axis;a fan nacelle mounted at least partially around said core nacelle, said fan nacelle having a multiple of semi-spherical vents between a radially inner surface and a radially outer surfa

What is claimed is: 1. A nacelle assembly for a gas turbine engine comprising:a core nacelle defined about an axis;a fan nacelle mounted at least partially around said core nacelle, said fan nacelle having a multiple of semi-spherical vents between a radially inner surface and a radially outer surface of the fan nacelle in communication with a fan bypass flow;a valve rotationally mounted at least partially within each of said multiple of vents to vary an airflow through a fan nozzle exit area; andwherein each valve defines a semi-spherical member rotatable about an axis.