# US 9,003,760 B2 · Acoustic processing panel, more particularly adapted for an air intake in an aircraft nacelle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,003,760 B2 - Document ID: US9003760B2 - Status: Granted - Kind: B2 - Application number: 13/145,685 - Filed: 2010-01-29 - Published: 2012-04-19 - Granted: 2015-04-14 - Earliest claimed: 2009-02-03 - Assignees: Airbus Operations GmbH - Applicants: Frédéric Chelin; Thierry Surply; Dominique Haro; Fabrice Gantie; David Lambert - Inventors: Frédéric Chelin; Thierry Surply; Dominique Haro; Fabrice Gantie; David Lambert - Web page: https://patentgrep.com/patent/US9003760B2 ## CPC - B64D 33/02: of combustion air intakes - B64D 15/04: Hot gas application - F02C 7/045: having provisions for noise suppression - F02C 7/047: Heating to prevent icing - F02K 1/827: {Sound absorbing structures or liners} - B64D 2033/0206: {comprising noise reduction means, e.g. acoustic liners} - B64D 2033/0233: {comprising de-icing means} - Y10T 137/0536: Highspeed fluid intake means [e.g., jet engine intake] - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An acoustic treatment panel that is connected to an air intake of an aircraft nacelle, includes at least one acoustically resistive structure (30) and a reflective layer (32), between which are located—in a direction that is essentially perpendicular to the longitudinal direction of the nacelle—bands (34) of alveolar cells spaced in such a way as to allow the passage of hot air provided for a frost treatment, characterized in that it includes pipes (36) for hot air that are each delimited by at least one partition that extends from the acoustically resistive layer (30) up to the reflective layer (32) in such a way as to insulate the bands (34) of cells in the longitudinal direction. ## Claims ### Claim 1 An acoustic treatment panel that is connected to an air intake of an aircraft nacelle, whereby said panel comprises at least one acoustically resistive structure (30) and a reflective layer (32), between which are located—in a direction that is essentially perpendicular to the longitudinal direction (18) of the nacelle—bands (34) of alveolar cells spaced in such a way as to allow the passage of hot air provided for a frost treatment, the panel further comprising pipes (36) for hot air that are each delimited by at least one partition (36.1) that extends from the acoustically resistive layer (30) up to the reflective layer (32) in such a way as to insulate said bands (34) of cells in the longitudinal direction. ### Claim 2 (depends on 1) The acoustic treatment panel according to claim 1, wherein each pipe (36) comprises two partitions (36.1, 36.2) that extend from the reflective layer (32) to the acoustically resistive layer (30), a first partition (36.1) that has a C shape with wings, with the second partition (36.2) comprising dropped edges in such a way as to ensure an essentially tight connection with the ends of the wings of the first partition (36.1). ### Claim 3 (depends on 2) The acoustic treatment panel according to claim 2, further comprising a third partition (36.3) in such a way as to delimit—with the first and second partitions (36.1, 36.2)—two pipes, a first pipe (36) for the hot air in contact with the acoustically resistive layer (30) and a second drain pipe (38) in contact with the reflective layer (32). ### Claim 4 (depends on 1) The acoustic treatment panel according to claim 1, wherein each pipe (36) comprises a first partition (36.1) with an L shape that extends from the reflective layer (32) up to the acoustically resistive layer (30) and a second partition (36.2) of which a first edge is connected to one end of a wing of the first partition (36.1) and of which a second edge is connected to another wing of the first partition (36.1) in an offset manner relative to its end so that the bands of alveolar cells are separated only by a single partition (36.1). ### Claim 5 (depends on 2) The acoustic treatment panel according to claim 2, wherein at least one of the partitions (36.1, 36.2) of a pipe (36) has a wavy profile in a plane that is parallel to the reflective layer. ### Claim 6 (depends on 2) The acoustic treatment panel according to claim 2, wherein a band (34) of alveolar cells comprises at least two wavy walls (34.1, 34.2, 34.3), with the projecting shapes of a wall being in contact with the hollow shapes of the adjacent band in such a way as to delimit the cells. ### Claim 7 (depends on 6) The acoustic treatment panel according to claim 6, wherein the projecting shapes comprise a double undulation with two peaks (35) framing a trough (37) whose radius of curvature is essentially identical to the one of the hollow shape of the adjacent wall in such a way as to increase the contact surface between the two walls. ### Claim 8 (depends on 1) An aircraft nacelle that comprises an acoustic treatment panel according to claim 1. ### Claim 9 (depends on 3) The acoustic treatment panel according to claim 3, wherein a band (34) of alveolar cells comprises at least two wavy walls (34.1, 34.2, 34.3), with the projecting shapes of a wall being in contact with the hollow shapes of the adjacent band in such a way as to delimit the cells. ### Claim 10 (depends on 4) The acoustic treatment panel according to claim 4, wherein a band (34) of alveolar cells comprises at least two wavy walls (34.1, 34.2, 34.3), with the projecting shapes of a wall being in contact with the hollow shapes of the adjacent band in such a way as to delimit the cells. ### Claim 11 (depends on 3) The acoustic treatment panel according to claim 3, wherein at least one of the partitions (36.1, 36.2) of a pipe (36) has a wavy profile in a plane that is parallel to the reflective layer. ### Claim 12 (depends on 4) The acoustic treatment panel according to claim 4, wherein at least one of the partitions (36.1, 36.2) of a pipe (36) has a wavy profile in a plane that is parallel to the reflective layer.