Linear acoustic liner
AssigneeRohr, Inc.
InventorsSong Chiou, Jia Yu, Claude Hubert, Michael Layland, Hwa-Wan Kwan
Life of this patent
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Abstract
A linear acoustic liner for an aircraft includes a cellular core having a first surface and an opposed second surface. A substantially imperforate back skin covers the first surface, and a perforate face skin covers the second surface of the core. The perforate face skin includes an outer face skin layer having a first plurality of spaced openings, an inner face skin layer having a second plurality of spaced openings, and a porous layer disposed between the outer face skin layer and the inner face skin layer. Each of the first plurality of spaced openings are substantially aligned with one of the second plurality of spaced openings.
Claims19
A linear acoustic liner for an aircraft comprising:
- (a) a cellular core having a first surface and an opposed second surface;
- (b) a substantially imperforate back skin covering the first surface of the core;
- (c) a perforate face skin covering the second surface of the core, the face skin comprising:
- (i) an outer face skin layer having a first plurality of spaced openings extending therethrough;
- (ii) an inner face skin layer having a second plurality of spaced openings extending therethrough;
- and
- (iii) a porous layer disposed between the outer face skin layer and the inner face skin layer;
- (iv) wherein each of the first plurality of spaced openings substantially aligns with one of the second plurality of spaced openings.
A method of producing a linear acoustic liner, the method comprising:
- (a) placing a release layer between at least one outer composite layer and at least one inner composite layer;
- (b) restraining the outer and inner composite layers in a desired configuration;
- (c) curing the outer and inner composite layers in the restrained configuration;
- (d) forming a plurality of spaced openings through the cured outer and inner composite layers;
- (e) separating the cured outer composite layer and the cured inner composite layer from the release layer;
- (f) inserting a porous layer and a first adhesive material between the cured outer and inner layers and realigning the spaced openings in the outer and inner composite layers;
- (g) placing the assembled inner and outer composite layers and porous layer over a first face of an open cell core with a second adhesive material therebetween;
- and
- (h) curing the first and second adhesive materials.
Dependencies are inferred from the claim text.