# US 10,480,412 B2 · Structure ensuring attenuation of acoustic waves and thermal exchange

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- Number: US 10,480,412 B2
- Document ID: US10480412B2
- Status: Granted
- Kind: B2
- Application number: 15/583,902
- Filed: 2017-05-01
- Published: 2017-11-09
- Granted: 2019-11-19
- Earliest claimed: 2016-05-03
- Assignees: Airbus Operations GmbH
- Applicants: Airbus Operations (S.A.S.)
- Inventors: Maxime Zebian
- Web page: https://patentgrep.com/patent/US10480412B2

## CPC

- F02C 7/045: having provisions for noise suppression
- B64C 21/02: by use of slot, ducts, porous areas or the like
- B64D 33/02: of combustion air intakes
- F02C 7/18: the medium being gaseous, e.g. air {(F02C7/125 takes precedence)}
- F02K 1/827: {Sound absorbing structures or liners}
- F02K 3/115: by means of indirect heat exchange
- B64C 2230/14: achieving noise reductions
- B64D 2033/0206: {comprising noise reduction means, e.g. acoustic liners}
- B64D 2033/024: {comprising cooling means}
- F05D 2260/213: by the provision of a heat exchanger within the cooling circuit
- F05D 2260/96: Preventing, counteracting or reducing vibration or noise
- Y02T 50/60: Efficient propulsion technologies, e.g. for 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)
- B64C: AEROPLANES; HELICOPTERS
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- 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)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A structure ensuring acoustic attenuation of a flow of a first fluid and heat exchange between a first fluid and a second fluid. The structure includes a first wall which is perforated, a second wall, and a plurality of intermediate walls extending between the first wall and the second wall. For each intermediate wall, there is a pipe intended to receive the second fluid and inscribed within the intermediate wall. Such a structure makes it possible to optimally integrate the acoustic wave attenuation function and the heat exchange function.

## Claims

### Claim 1

A structure for providing acoustic attenuation of a flow of a first fluid flowing along the structure, the structure comprising:
a first wall, which is perforated by a plurality of holes;
a second wall;
a plurality of intermediate walls extending between the first wall and the second wall;
a plurality of corridors defined between adjacent intermediate walls, the corridors being bounded by the first and second walls; and
a pipe configured to receive a second fluid, wherein each pipe is oriented along a length of, and inscribed within, one of the plurality of intermediate walls, and wherein the pipe is located a distance from both the first wall and the second wall;
wherein the structure is configured for a portion of the first flow to penetrate, via the holes formed in the first wall, into the corridors for heat exchange between the portion of the first fluid in the corridors and the second fluid in a corresponding pipe in one of the intermediate walls defining the corridor.

### Claim 2 (depends on 1)

The structure according to claim 1, wherein the first fluid is air and the second fluid is oil.

### Claim 3 (depends on 1)

The structure according to claim 1, wherein the first flow penetrates directly into each of the corridors via the holes formed in the first wall.

### Claim 4 (depends on 1)

The structure according to claim 1, wherein each pipe has an elliptical profile.

### Claim 5 (depends on 1)

The structure according to claim 1, comprising a partition wall integral with one or more of the plurality of intermediate walls and extending inside of the pipe and separating the pipe into two sub-pipes.

### Claim 6 (depends on 5)

The structure according to claim 5, wherein the partition wall is a corrugated plate.

### Claim 7 (depends on 5)

The structure according to claim 5, wherein the partition wall has through holes connecting both sides of the partition wall.

### Claim 8 (depends on 1)

An aircraft having a pod, the pod having an inner wall that defines an air duct, an inner wall thereof comprising at least one structure according to claim 1, wherein the first wall is oriented toward an inside of the air duct.

### Claim 9

A structure for providing acoustic attenuation of a flow of a first fluid flowing along the structure, the structure comprising:
a first wall, which is perforated by a plurality of holes;
a second wall;
a plurality of intermediate walls extending between the first wall and the second wall, wherein one or more of the plurality of intermediate walls is in a form of a double wall comprising two parallel walls that extend between the first wall and the second wall and are separated by a free space forming a pipe configured to receive a second fluid; and
a plurality of corridors defined between adjacent intermediate walls, the corridors being bounded by the first and second walls;
wherein each pipe is oriented along a length of, and inscribed within, a corresponding one of the one or more of the plurality of intermediate walls in which the pipe is formed; and
wherein the structure is configured such for a portion of the first flow to penetrate, via the holes formed in the first wall, into the corridors for heat exchange between the portion of the first fluid in the corridors and the second fluid in a corresponding pipe in one of the intermediate walls defining the corridor.

### Claim 10 (depends on 9)

The structure according to claim 9, wherein the intermediate wall has a dividing wall which extends between the two parallel walls of the intermediate wall and which defines, at a level of the first wall, a chamber separated from the pipe by the dividing wall.

### Claim 11 (depends on 9)

A structure according to claim 9, comprising a partition wall integral with the one or more intermediate walls, the partition wall extending inside of the pipe and separating the pipe into two sub-pipes.

### Claim 12 (depends on 11)

The structure according to claim 11, wherein the partition wall is a corrugated plate.

### Claim 13 (depends on 11)

The structure according to claim 11, wherein the partition wall has through holes connecting both sides of the partition wall.

### Claim 14 (depends on 11)

The structure according to claim 11, wherein each partition wall has a part that extends beyond the first wall.

### Claim 15 (depends on 9)

The structure according to claim 9, wherein each intermediate wall has a part that extends beyond the first wall.

### Claim 16 (depends on 9)

The structure according to claim 9, comprising fins that extend along the first wall on a side thereof that is opposite the pipe, wherein each fin extends perpendicularly to the one or more intermediate walls and is integral with the first wall.

### Claim 17 (depends on 9)

An aircraft having a pod, the pod having an inner wall that defines an air duct, an inner wall thereof comprising at least one structure according to claim 9, wherein the first wall is oriented toward an inside of the air duct.

### Claim 18

A structure providing acoustic attenuation of a flow of a first fluid flowing along the structure, the structure comprising:
a first wall, which is perforated by a plurality of holes;
a second wall;
a plurality of intermediate walls extending between the first wall and the second wall, wherein one or more of the plurality of intermediate walls is in a form of a double wall comprising two parallel walls that extend between the first wall and the second wall and are separated by a free space forming a pipe configured to receive a second fluid;
a plurality of corridors defined between adjacent intermediate walls, the corridors being bounded by the first and second walls;
a partition wall integral with one or more of the plurality of intermediate walls and extending inside of the pipe and separating the pipe into two sub-pipes; and
fins that extend along the first wall on a side thereof that is opposite the pipe, wherein each fin extends perpendicularly to the one or more intermediate walls and is integral with the first wall,
wherein each pipe is oriented along a length of, and inscribed within, a corresponding one of the one or more of the plurality of intermediate walls in which the pipe is formed,
wherein each pipe is located a distance from both the first wall and the second wall.