Assembly for an exhaust cone of an aircraft turbomachine

Patent metadata

Field	Value
Publication number	US-2025035069-A1
Application number	US-202218714363-A
Country	US
Kind code	A1
Filing date	Dec 2, 2022
Priority date	Dec 3, 2021
Publication date	Jan 30, 2025
Grant date	—

Abstract

An assembly for an exhaust cone of an aircraft turbomachine, including a first annular wall, and first partitions and second partitions defining between them a plurality of acoustic boxes distributed around the first wall, an assembly formed by the first and the second partitions being fastened to the first wall with first fastening members arranged upstream and with second fastening members arranged downstream, the first fastening members being offset circumferentially with respect to the second fastening members.

First claim

1 . An assembly for an exhaust cone of an aircraft turbomachine, comprising a first annular wall centred on a longitudinal axis running axially from upstream to downstream, a plurality of first partitions and second partitions extending substantially perpendicularly from the first wall, wherein the first partitions extend generally in the axial direction and are distributed circumferentially around the first wall, wherein the second partitions extend generally in a circumferential direction between the pairs of first adjacent partitions and are distributed circumferentially around the annular wall in at least one circumferential row, and wherein the first wall, the first partitions and the second partitions define between them a plurality of acoustic enclosures distributed around the first wall,
wherein an arrangement formed by the first and the second partitions is fixed to the first wall with first fixing members arranged upstream and second fixing members arranged downstream, and wherein the first fixing members are offset circumferentially relative to the second fixing members.

2 . The assembly according to claim 1 , wherein the first fixing members ) are mounted between second partitions of the most upstream circumferential row and an upstream portion of the first wall.

3 . The assembly according to claim 2 , wherein the first fixing members are mounted on one side only, on the downstream side, of said second partitions in the axial direction and/or wherein each first fixing member is separated from the first fixing members circumferentially adjacent thereto by one or two first partitions.

4 . The assembly according to claim 1 , wherein the first fixing members are mounted between first partitions and an upstream portion of the first wall.

5 . The assembly according to claim 4 , wherein the first fixing members are mounted upstream of the circumferential rows of second partitions and/or the first fixing members are mounted on each side of said first partitions in the circumferential direction.

6 . The assembly according to claim 1 , wherein the second fixing members are mounted between first partitions and a downstream portion of the first wall downstream of the circumferential rows of second partitions.

7 . The assembly according to claim 6 , wherein the second fixing members are mounted on each side of said first partitions in the circumferential direction or wherein each second fixing member is mounted on one side only of said first partitions in the circumferential direction, opposite another second fixing member.

8 . The assembly according to claim 1 , wherein the second partitions are curved partitions comprising at least one arcuate portion in the axial direction upstream or downstream.

9 . An exhaust cone comprising an assembly according to claim 1 .

10 . An aircraft turbomachine, comprising an exhaust cone according to claim 9 .

Assignees

• Safran Nacelles

Inventors

• Miossec Tony
• Bravin Fabien
• Devanlay Vincent
• Versaevel Marc
• Simeon Valentin

Classifications

• F05D2260/963

  by Helmholtz resonators · CPC title

• F05D2220/323

  for aircraft propulsion, e.g. jet engines · CPC title

• F02K1/827 Primary

  Sound absorbing structures or liners · CPC title

• F05D2260/96

  Preventing, counteracting or reducing vibration or noise · CPC title

• F02K1/44

  Nozzles having means, e.g. a shield, reducing sound radiation in a specified direction (F02K1/40 takes precedence) · CPC title