Patent ID: 6134879
Filing Date: 2000-10-24
Classification: B64D,F02K,Y02T

Abstract:
An infrared suppression system for a gas turbine engine which generates an exhaust gas stream comprising:exhaust duct means fluidically connected to the engine for directing the exhaust gas stream,tapered exhaust manifold means fluidically connected to said exhaust duct means, said manifold means having an inlet for receiving said exhaust stream and one or more openings disposed normal to the exhaust manifold means, said openings longitudinally aligned along the manifold means, each opening sized for allowing a portion of the exhaust stream to exit therefrom in the form of a ribbon,mixing duct means, disposed parallel to and spaced apart from the exhaust manifold means, and having one or more cells corresponding to the one or more openings, each cell associated with and substantially surrounding an opening, each cell having sidewalls, which are spaced away from the exhaust manifold means, to define a pair of inlets therebetween, such that exhaust gas passing through the opening creates a venturi effect within the mixing cell drawing cooling air through the inlet, the cooling air coating the sidewalls of the cell to prevent impingement of the exhaust gas of the sidewalls, the mixing duct means being composed of or coated with a radar-absorbing material.