Infrared radiation screening device
First Claim
1. An apparatus for shielding infrared emissions of an operating engine for hindering IR-detection, comprising an outer gas guiding ring (11), pivotable link means (10a) for adjustably attaching said gas guiding ring to an exhaust outlet (100) of said engine, a conical core structure (12) arranged essentially in a concentrical position within said gas guiding ring (11) for forming a cooling air channel (14, 14'"'"') with an ejector effect between said exhaust outlet and said gas guiding ring and between said gas guiding ring and said conical core structure, a cover plate (13) secured to a large downstream directed end of said conical core structure for covering said large downstream directed end of said conical core structure, said engine exhaust outlet forming with an upstream end of said outer gas guiding ring a ring inlet for feeding cooling air into said cooling air channel having said ejector effect, strut means (17) for supporting said conical core structure and said cover plate in said concentrical position within said gas guiding ring, said gas guiding ring, said conical core structure, said cover plate, and said strut means being made of a carbon-fiber-carbon composite material having a high temperature resistance to form an integral unit which is position adjustable.
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Accused Products
Abstract
An infrared radiation screening arrangement includes a special core structure and an outer gas guiding ring which together serve to block the direct view of a hot engine exhaust gas outlet and associated hot engine parts in order to hinder IR-detection of the engine. The gas guiding ring and the core structure define a cooling air guide channel with cooling air inlets for cooling the components of the arrangement and for cooling the exhaust gas stream which is ejected in an essentially unaltered direction.
22 Citations
6 Claims
- 1. An apparatus for shielding infrared emissions of an operating engine for hindering IR-detection, comprising an outer gas guiding ring (11), pivotable link means (10a) for adjustably attaching said gas guiding ring to an exhaust outlet (100) of said engine, a conical core structure (12) arranged essentially in a concentrical position within said gas guiding ring (11) for forming a cooling air channel (14, 14'"'"') with an ejector effect between said exhaust outlet and said gas guiding ring and between said gas guiding ring and said conical core structure, a cover plate (13) secured to a large downstream directed end of said conical core structure for covering said large downstream directed end of said conical core structure, said engine exhaust outlet forming with an upstream end of said outer gas guiding ring a ring inlet for feeding cooling air into said cooling air channel having said ejector effect, strut means (17) for supporting said conical core structure and said cover plate in said concentrical position within said gas guiding ring, said gas guiding ring, said conical core structure, said cover plate, and said strut means being made of a carbon-fiber-carbon composite material having a high temperature resistance to form an integral unit which is position adjustable.
Specification