Patent ID: 7805925
Filing Date: 2010-10-05
Classification: F02K,F05D

Abstract:
1. An exhaust centerbody of a gas turbine engine disposed within an exhaust duct casing, exhaust gas flow passing through an annular exhaust duct passage defined between the exhaust centerbody and the surrounding exhaust duct casing, the exhaust centerbody comprising: a forward centerbody portion defining a first outer wall over which exhaust gas flows and having an annular :flange at a downstream end thereof, the annular flange including a first flange portion and a second flange portion downstream of the first flange portion, the second flange portion being substantially parallel to a central axis of the centerbody and the first flange portion being disposed between the first outer wall and the second flange portion at an angle relative to said second flange portion; a tailcone portion defining a second outer wall, the tailcone portion having a closed downstream end and an open upstream end, said open upstream end of the tailcone portion being mated to the second flange portion of the forward centerbody portion about the circumference of the annular flange thereof; a centerbody cavity defined within the first and second outer walls and the closed downstream end; and a plurality of ventilation openings defined in said first flange portion of the forward centerbody portion, said ventilation openings permitting fluid to flow from the centerbody cavity within the exhaust centerbody into the exhaust gas flow outside the centerbody cavity, thereby ventilating the centerbody cavity.