Patent ID: 6792748
Filing Date: 2004-09-21
Classification: F02K,Y02T

Abstract:
Cooling system for a post combustion jet nozzle, said jet nozzle comprising a primary gas duct allowing a primary flow of gas, a secondary air duct allowing a secondary flow of air, said secondary air duct surrounding said primary gas duct and separated from it by a protective thermal shroud, said secondary air duct having a downstream end, dampers surrounding an output section of the primary gas duct, the cooling system comprising a protective thermal shell in the secondary air duct, at the downstream end of said duct,wherein the protective thermal shell bears an annular diaphragm extending out in front of the dampers and being provided with support sectors and inter-sector zones equipped with slots, said inter-sector zones defining spaces between the annular diaphragm end the protective thermal shroud.