Acoustic panel with sidewall stringers

Patent metadata

Field	Value
Publication number	US-10316755-B2
Application number	US-201615356053-A
Country	US
Kind code	B2
Filing date	Nov 18, 2016
Priority date	Nov 18, 2016
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A panel for attenuating noise includes a porous first skin, a second skin, and a core connected between the porous first skin and the second skin. The core includes a corrugated body and a stringer body. The corrugated body includes a plurality of corrugations configured from at least a plurality of baffles and a plurality of porous septums. Each of the corrugations includes a respective one of the baffles and a respective one of the porous septums. A first of the corrugations forms a first channel that extends laterally between and longitudinally along a first of the baffles and a first of the porous septums. The stringer body includes a plurality of sidewalls arranged longitudinally along the first channel. Each of the sidewalls is disposed within the first channel and configured to fluidly isolate longitudinally adjacent portions of the first channel from one another.

First claim

We claim:

1. A panel for attenuating noise, comprising:
a porous first skin;
a second skin; and
a core connected between the porous first skin and the second skin, the core including a corrugated body and a stringer body;
the corrugated body including a plurality of corrugations configured from at least a plurality of baffles and a plurality of porous septums, each of the corrugations including a respective one of the baffles and a respective one of the porous septums, wherein a first of the corrugations forms a first channel that extends laterally between and longitudinally along a first of the baffles and a first of the porous septums; and
the stringer body including a plurality of sidewalls arranged longitudinally along the first channel, each of the sidewalls disposed within the first channel and configured to fluidly isolate longitudinally adjacent portions of the first channel from one another;
wherein a first of the sidewalls is configured as a multi-wall structure.

2. The panel of claim 1 , wherein
a second of the corrugations forms a second channel that extends laterally between and longitudinally along a second of the baffles and a second of the porous septums;
the core further includes a second stringer body including a plurality of second sidewalls arranged longitudinally along the second channel; and
each of the second sidewalls is disposed within the second channel and configured to fluidly isolate longitudinally adjacent portions of the second channel from one another.

3. The panel of claim 1 , wherein
a second channel extends laterally between and longitudinally along the first of the porous septums and a second of the baffles;
the core further includes a second stringer body including a plurality of second sidewalls arranged longitudinally along the second channel; and
each of the second sidewalls is disposed within the second channel and configured to fluidly isolate longitudinally adjacent portions of the second channel from one another.

4. The panel of claim 3 , wherein the first channel and the second channel are on opposing sides of the corrugated body.

5. The panel of claim 3 , wherein
a cavity extends laterally between the first of the baffles and the second of the baffles and is fluidly coupled with perforations in the porous first skin;
the first of the porous septums extending from the porous first skin and the first of the baffles to the second skin and the first of the baffles, and dividing the cavity into fluidly coupled first and second sub-cavities;
the first sub-cavity extends longitudinally between a longitudinally adjacent pair of the sidewalls; and
the second sub-cavity extends longitudinally between a longitudinally adjacent pair of the second sidewalls.

6. The panel of claim 1 , wherein
a second of the corrugations forms a second channel that extends laterally between and longitudinally along a second of the baffles and a second of the porous septums;
the stringer body further includes a plurality of second sidewalls arranged longitudinally along the second channel; and
each of the second sidewalls is disposed within the second channel and configured to fluidly isolate longitudinally adjacent portions of the second channel from one another.

7. The panel of claim 1 , wherein
the first of the sidewalls includes a pair of sidewall panels and a bridge that extends longitudinally between and connects the sidewall panels; and
each of the sidewall panels projects into the first channel to the first of the baffles and the first of the porous septums from the bridge.

8. A panel for attenuating noise, comprising:
a porous first skin;
a second skin; and
a core connected between the porous first skin and the second skin, the core including a corrugated body and a stringer body;
the corrugated body including a plurality of corrugations configured from at least a plurality of baffles and a plurality of porous septums, each of the corrugations including a respective one of the baffles and a respective one of the porous septums, wherein a first of the corrugations forms a first channel that extends laterally between and longitudinally along a first of the baffles and a first of the porous septums; and
the stringer body including a plurality of sidewalls arranged longitudinally along the first channel, each of the sidewalls disposed within the first channel and configured to fluidly isolate longitudinally adjacent portions of the first channel from one another;
wherein the stringer body further includes a tab that projects out from a first of the sidewalls and is attached to the first of the baffles or the first of the porous septums.

9. The panel of claim 1 , wherein each of the sidewalls extends laterally between the first of the baffles and the first of the porous septums and vertically to the porous first skin.

10. The panel of claim 1 , wherein each of the sidewalls extends laterally between the first of the baffles and the first of the porous septums and vertically to the second skin.

11. A panel for attenuating noise, comprising:
a porous first skin;
a second skin; and
a core connected between the porous first skin and the second skin, the core including a corrugated body and a stringer body;
the corrugated body including a plurality of corrugations configured from at least a plurality of baffles and a plurality of porous septums, each of the corrugations including a respective one of the baffles and a respective one of the porous septums, wherein a first of the corrugations forms a first channel that extends laterally between and longitudinally along a first of the baffles and a first of the porous septums; and
the stringer body including a plurality of sidewalls arranged longitudinally along the first channel, each of the sidewalls disposed within the first channel and configured to fluidly isolate longitudinally adjacent portions of the first channel from one another;
wherein the stringer body further includes a plurality of bridges arranged at an interface between the first of the baffles and the first of the porous septums; and
wherein each of the bridges extends longitudinally between and connects a respective longitudinally adjacent pair of the sidewalls.

12. A panel for attenuating noise, comprising:
a porous first skin;
a second skin; and
a core connected between the porous first skin and the second skin, the core including a corrugated body and a stringer body;
the corrugated body including a plurality of corrugations configured from at least a plurality of baffles and a plurality of porous septums, each of the corrugations including a respective one of the baffles and a respective one of the porous septums, wherein a first of the corrugations forms a first channel that extends laterally between and longitudinally along a first of the baffles and a first of the porous septums; and
the stringer body including a plurality of sidewalls arranged longitudinally along the first channel, each of the sidewalls disposed within the first channel and configured to fluidly isolate longitudinally adjacent portions of the first channel from one another;
wherein the stringer body further includes a base structure that interconnects the sidewalls together; and
wherein each of the sidewalls projects vertically into the first channel from the base structure.

13. The panel of claim 1 , wherein the stringer body is formed from sheet metal.

14. The panel of claim 1 , wherein
the corrugated structure comprises composite material; and
the stringer body comprises metal.

15. The panel of claim 1 , wherein the stringer body comprises polymer.

Assignees

• Rohr Inc

Inventors

• Biset Charles Michael
• Soria Christian

Classifications

• F02C7/24 Primary

  Heat or noise insulation (air intakes having provisions for noise suppression F02C7/045; turbine exhaust heads, chambers, or the like F01D25/30; silencing nozzles of jet-propulsion plants F02K1/00) · CPC title

• F02K1/827

  Sound absorbing structures or liners · CPC title

• G10K11/168

  Plural layers of different materials, e.g. sandwiches · CPC title

• G10K11/172

  using resonance effects · CPC title

• G10K11/16 Primary

  Methods or devices for protecting against, or for damping, noise or other acoustic waves in general (G10K11/36 takes precedence) · CPC title