초록 ▼

An air-cooled contoured plug fitted within the engine tailpipe to physically block any direct view to the turbine section. A vortex cavity is provided around the plug just aft of the plug maximum diameter in order to reduce the length of the cone-shaped plug. The trapped vortex reenergizes the bound

An air-cooled contoured plug fitted within the engine tailpipe to physically block any direct view to the turbine section. A vortex cavity is provided around the plug just aft of the plug maximum diameter in order to reduce the length of the cone-shaped plug. The trapped vortex reenergizes the boundary layer built up along the cone surface and allows the flow of hot gases to turn the corner without separating.

대표청구항 ▼

An infrared suppressor for the exhaust of an infrared radiation source comprising, a tailpipe for receiving hot exhaust gases from said infrared radiation source and low temperature fan air, a contoured plug fitted within said tailpipe and positioned to have said hot gases flow over the surface ther

An infrared suppressor for the exhaust of an infrared radiation source comprising, a tailpipe for receiving hot exhaust gases from said infrared radiation source and low temperature fan air, a contoured plug fitted within said tailpipe and positioned to have said hot gases flow over the surface thereof, said contoured plug being sufficiently large to prevent direct viewing of said infrared radiation source, an annular vortex cavity on said contoured plug for reenergizing the boundary layer built up along the surface of said contoured plug for maintaining flow of said hot exhaust gases in contact with said contoured plug, means for supplying high pressure bleed air to said vortex cavity, and means for diverting a portion of said low temperature fan air inside said contoured plug.