초록 ▼

An acoustic liner jet engine inlet barrel is formed from a perforated permeable skin, a honeycomb core, and a solid facesheet, each of which is formed in a one-piece configuration such that at most only a narrow single fore-to-aft splice, or no spice at all, is present in the finished product. The a

An acoustic liner jet engine inlet barrel is formed from a perforated permeable skin, a honeycomb core, and a solid facesheet, each of which is formed in a one-piece configuration such that at most only a narrow single fore-to-aft splice, or no spice at all, is present in the finished product. The acoustic modal content remains unaffected, thus preserving a high degree of liner effectiveness, increasing the total active acoustic area of the barrel while decreasing its weight, and increasing its durability.

대표청구항 ▼

[ We claim:] [1.] A method of making an engine inlet acoustic barrel having a one-piece monocoque structure, said barrel being substantially cylindrical in shape and having as forward end, an aft end, and an air passage surface in an interior of the cylindrically-shaped barrel, comprising the steps

[ We claim:] [1.] A method of making an engine inlet acoustic barrel having a one-piece monocoque structure, said barrel being substantially cylindrical in shape and having as forward end, an aft end, and an air passage surface in an interior of the cylindrically-shaped barrel, comprising the steps of:(a) forming a substantially cylindrical continuous one-piece porous inner facesheet having no splices extending from said forward end to said aft end;(b) forming a substantially cylindrical one-piece core structure having no splices;(c) forming a continuous one-piece non-porous back facesheet having no spices extending from said forward end to said aft end; andforming a continuous one-piece non-porous inner facesheet;(d) bonding said continuous one-piece porous inner facesheet within said one-piece core structure and securing said core structure within said continuous one-piece non-porous back facesheet to form said engine inlet acoustic barrel having a one-piece monocoque structure.