Cooled variable geometry exhaust nozzle

The nozzle of claim wherein 4 the divergent flaps have a length and the discharge ports penetrate the divergent flaps aft of about 50% of the flap length.

A convergent divergent exhaust nozzle, comprising:

• a plurality of convergent flaps each having an aft end and each pivotably connected to a frame, the convergent flaps being pivotable over a range of orientations and collectively circumscribing part of a gaspath;
• a plurality of divergent flaps each comprising an inner and outer skin separated by a spacer to define an interior space between the skins, each divergent flap also having a forward end, the forward ends being pivotably connected to the aft ends of the convergent flaps and being pivotable over a spectrum of orientations, the flaps defining a nozzle throat and the divergent flaps being contoured to present a radially inwardly extending projection to the gaspath over at least part of the range and spectrum of orientations, the divergent flaps being penetrated by a plurality of intake apertures residing no further aft than the throat, the divergent flaps also including an outlet aft of the intake apertures, the intake apertures and discharge ports cooperating with the interior space to establish a coolant flowpath;
• wherein a stream of film coolant flows along the flaps and the projection diverts a portion of the film coolant stream into the coolant flowpath.