VARIABLE AREA EXHAUST NOZZLE

摘要

A gas turbine engine is described, said gas turbine engine comprising: a by-pass fan, a fuel-burning gas turbine core structure having an exhaust nozzle for hot exhaust gas, said core structure being at least partially surrounded by a by-pass airstream cowling structure, said core structure and said by-pass airstream cowling structure defining a by-pass airstream duct therebetween, said duct having a by-pass airstream exhaust nozzle adjacent a downstream end thereof wherein an area of the exhaust nozzle for the hot exhaust gas and/or the by-pass airstream is selectively variable, said exhaust nozzle comprising at least first and second generally annular ring members, said ring members each having circumferential discontinuities at a trailing edge thereof, said ring members being mutually displaceable so as to bring said discontinuities into and out of register with each other so as to increase or decrease said nozzle area.