Patent ID: 7823387

Claim:
A gas turbine engine diffuser defined between an external casing and an internal casing of said engine and supplied with air via an upstream annular diffuser duct, the diffuser comprising: a combustion chamber of the convergent type, defining an external annular duct with the external casing and an internal annular duct with the internal casing; and a cowling disposed between the external casing and the combustion chamber so as to partially close off the external annular duct, wherein the cowling includes a body with a symmetry of revolution about a cowling axis, the body includes a substantially flat cross section with a radially external end and a radially internal end, a radially external edge which extends from the radially external end and a radially internal edge which extends from the radially internal end, and wherein the radially external edge of the cowling rests against an internal face of the external casing.