A variable geometry convergent-divergent nozzle for a gas turbine engine
includes a centerbody extending rearward along a longitudinal axis of the
engine which has a throat section of increased diameter. An inner shroud
surrounds the centerbody and cooperates with the centerbody to define the
throat of the nozzle. An outer shroud surrounds the inner shroud and
cooperates with the centerbody to define the exit area of the nozzle.
Both shrouds are independently translatable to provide independent
control of the nozzle throat area and the nozzle expansion ratio.