Turbine engine nozzle

In one aspect, a nozzle subassembly comprises a an upstream flap 22, a downstream flap 26 pivotally connected to the upstream flap 22, and an actuator linkage 70 coupled to the downstream flap 26 at a location in a forward half thereof. A surface portion 40 may define a throat, and an external flap...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DALE W PETTY, ALEX J O SIMPSON
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:In one aspect, a nozzle subassembly comprises a an upstream flap 22, a downstream flap 26 pivotally connected to the upstream flap 22, and an actuator linkage 70 coupled to the downstream flap 26 at a location in a forward half thereof. A surface portion 40 may define a throat, and an external flap 50, comprising telescopic portions 94,96 may be provided. A secondary link 100 may be connected to a static structure 66, and to the downstream flap 26 by means of a slider 113 and slot 112 allowing restricted movement. In another aspect, a nozzle comprising a plurality of flap subassemblies has means for articulating upstream and downstream flaps to achieve a minimisation of mode-induced changes in throat area at a given design point. In a still further aspect, a method of retrofitting or re-engineering a turbine engine, involves utilising one or more components of an existing actuation linkage and enabling flap rotation about a non-fixed axis due to aerodynamic effects.