Thrust vectorable fan variable area nozzle for a gas turbine engine fan nacelle

摘要

A thrust vectorable fan variable area nozzle (FVAN) includes a synchronizing ring, a static ring, and a flap assembly mounted within a fan nacelle. An actuator assembly selectively rotates synchronizing ring segments relative the static ring to adjust segments of the flap assembly to vary the annular fan exit area and vector the thrust through asymmetrical movement of the thrust vectorable FVAN segments. In operation, adjustment of the entire periphery of the thrust vectorable FVAN in which all segments are moved simultaneously to maximize engine thrust and fuel economy during each flight regime. By separately adjusting the segments of the thrust vectorable FVAN, engine trust is selectively vectored to provide, for example only, trim balance or thrust controlled maneuvering.

主权项

1. A nacelle assembly for a gas turbine engine comprising:
a fan nacelle defined about an engine centerline longitudinal axis; a core nacelle at least partially within said fan nacelle; and a flap assembly including at least first and second flap assembly segments pivotally mounted to said fan nacelle, said first and second flap assembly segments separately movable in response to circumferential movement of, respectively, first and second synchronizing ring arc segments about said engine longitudinal centerline axis to asymmetrically and symmetrically adjust an annular fan exit throat area between said fan nacelle and said core nacelle.