Patent ID: 7383918
Filing Date: 2008-06-10
Classification: F02K,F05D

Abstract:
1. A method for maintaining an exhaust augmenter of a jet engine noise suppressor sound attenuation system, said exhaust augmenter having an exterior shell and a cavity with interior structures, a plurality of perforated liner sheets, and a plurality of attachment fasteners, said method comprising the steps of: dissembling said exhaust attenuator from its supporting foundation; removing said plurality of perforated liner sheets; repairing or replacing damaged fasteners of said plurality of attachment fasteners; emplacing a stitched layer of basalt matt insulation at bottom portion of said exhaust augmenter cavity for providing tightly interwoven basalt fibers; enclosing said stitched basalt layer with an acoustical blanket; situating an acoustical pillow atop said acoustical blanket; enclosing said acoustical pillow with mesh screen for providing an insulation retention-barrier and an acoustical pillow wear-preventive pad; affixing said mesh screen-enclosed acoustical pillow in situ with a plurality of batten bars; cleaning said interior structures of said augmenter cavity; coating said cleaned interior structures with corrosion-control paint; overfilling said coated augmenter cavity with said stitched basalt matt for providing uniform insulation density therethroughout; securing said plurality of batten plates in situ with said plurality of retaining hardware; re-assembling said maintained augmenter and affixing it onto said supporting foundation; cleaning said exterior shell of said re-assembled augmenter; and coating said cleaned exterior shell with high-temperature paint commensurate and compatible with pre-existing paint of said exhaust augmenter.