公开(公告)号：US20240351699A1

公开(公告)日：2024-10-24

申请号：US18637871

申请日：2024-04-17

Applicant: SAFRAN NACELLES

Inventor： Bertrand Léon Marie DESJOYEAUX ,  Mathieu François Eric PREAU ,  Marc VERSAEVEL ,  Pierre Charles CARUEL ,  Geneviève CLUZEAU

IPC: B64D33/02

CPC classification number: B64D33/02 ,  B64D2033/0206

Abstract: An acoustic panel for an aircraft turbomachine has a sandwich structure. The sandwich structure includes a cell structure with a plurality of acoustic cells, a perforated acoustic structure, and a porous acoustic structure attached to the perforated acoustic structure. The perforated acoustic structure is arranged between the cell structure and the porous acoustic structure. The porous acoustic structure is multi-layered and has a first woven textile layer and a second woven textile layer connected to the first layer. The second layer is arranged between the first layer and the perforated acoustic structure.

公开(公告)号：US20240191655A1

公开(公告)日：2024-06-13

申请号：US18528974

申请日：2023-12-05

Applicant: SAFRAN NACELLES

Inventor： Bertrand Leon Marie DESJOYEAUX ,  Marc VERSAEVEL

IPC: F02C7/045 ,  F02K1/82

CPC classification number: F02C7/045 ,  F02K1/827 ,  B64D2033/0206 ,  F05D2250/283 ,  F05D2260/96 ,  F05D2300/603

Abstract: A core for an acoustic attenuation panel extending between a first and a second end face, the core including a plurality of tubular polygonal cells having a main axis of extension between the end faces, each cell including an internal cavity delimited by lateral walls extending between the first and second end faces and opening out into each of the two end faces, the cells being expandable in a direction parallel to the end faces, each polygonal cell having septa extending transversely relative to the main axis and being offset there along, wherein each septum is folded in a W-shape at least between one of the lateral walls and another of the lateral walls and has a through orifice, the orifices of two consecutive septa being offset radially with respect to the main axis to form a baffle.

公开(公告)号：US20210390940A1

公开(公告)日：2021-12-16

申请号：US17460933

申请日：2021-08-30

Applicant: Safran Nacelles

Inventor： Bertrand DESJOYEAUX ,  Marc VERSAEVEL ,  Mathieu PREAU ,  Laurent MOREAU

IPC: G10K11/168 ,  B29D24/00 ,  B32B3/12 ,  B32B27/40 ,  B32B27/12 ,  B32B5/02 ,  B32B3/26

Abstract: A method for manufacturing a sound attenuating panel uses an alveolar-core structure including a first edge and a second edge separated by alveolar cells, the alveolar cells including walls extending from the first and second edges and defining a primary conduit for the circulation of a sound wave that is to be attenuated. The method includes covering the first edge or the second edge of the alveolar-core structure with a compartmentation wall; deforming the compartmentation wall to define at least one secondary conduit for the circulation of a sound wave that is to be attenuated, the secondary conduit extending at least partially within said primary conduit; and creating an opening in the compartmentation wall to permit communication between the primary and secondary conduits.

公开(公告)号：US20240262522A1

公开(公告)日：2024-08-08

申请号：US18292765

申请日：2022-07-22

Applicant: SAFRAN NACELLES

Inventor： Denis GUILLOIS ,  Loïc CHAPELAIN ,  Marc VERSAEVEL

IPC: B64D33/02 ,  F02C7/24

CPC classification number: B64D33/02 ,  B64D2033/0206 ,  F02C7/24 ,  F05D2260/96

Abstract: An acoustic assembly including a multicellular acoustic panel having at least one through cavity along a direction X, wherein the acoustic assembly further includes at least one sealing element including a body enclosing one or more acoustic cells, the body being able to be inserted into the cavity and extending along the direction X between a first face and a second face, the sealing element further including a seal on the second face of the body able to ensure the sealing with the acoustic panel.

公开(公告)号：US20240191656A1

公开(公告)日：2024-06-13

申请号：US18554958

申请日：2022-04-11

Applicant: SAFRAN NACELLES

Inventor： Marc VERSAEVEL ,  Bertrand Léon Marie DESJOYEAUX ,  Pierre-Yves GINI

IPC: F02C7/045

CPC classification number: F02C7/045

Abstract: An acoustic panel for a turbine engine includes a first strip and a second strip each comprising an alternation of first ridges and second ridges connected by sidewalls. The first and second strips are joined to each other to form a plurality of cells, each delimited by a first ridge of the first strip and a first ridge of the second strip. A third strip is interposed between the first strip and the second strip and includes a first lateral wall bearing on the first strip The third strip further includes at least one tab that extends inside one of the cells and delimits all or part of a passage inside the associated cell.

公开(公告)号：US20220250767A1

公开(公告)日：2022-08-11

申请号：US17729541

申请日：2022-04-26

Applicant: Safran Nacelles

Inventor： Pierre CARUEL ,  Bertrand DESJOYEAUX ,  Bertrand LEROYER ,  Marc VERSAEVEL ,  Laurent Georges VALLEROY

IPC: B64F1/26

Abstract: An acoustic attenuation panel includes a cellular structure including a plurality of acoustic cells separated from one another by peripheral partitions, a perforated acoustic structure, the perforated acoustic structure and the cellular structure being formed in one piece in a first material, and a porous acoustic layer formed of a second material and fastened to a surface of the perforated acoustic structure by entangling the first material and the second material.

公开(公告)号：US20180230063A1

公开(公告)日：2018-08-16

申请号：US15878432

申请日：2018-01-24

Applicant: Safran Nacelles

Inventor： Arnaud Delehouze ,  Sylvain SENTIS ,  Bertrand DESJOYEAUX ,  Marc VERSAEVEL ,  Frédéric Fosse

IPC: C04B35/80 ,  C04B35/628 ,  C04B35/64 ,  G10K11/162 ,  F02K1/82

Abstract: A method for producing an acoustic attenuation panel from a composite material with a ceramic oxide matrix is provided that includes draping a plurality of plies having fibrous reinforcements including fibers of ceramic material in a mold to define a first skin, depositing blocks made of fugitive material on the first skin such that a space between two blocks is defined, and draping a second plurality of plies on a surface formed by the blocks such that a second skin is defined. Rounded corners of the blocks define radii for connecting the first and second skins with walls of a honeycomb core of the acoustic panel. The method further includes using a liquid medium to infiltrate the skins and spaces with a precursor of a ceramic phase, removing the liquid medium by evaporation or polymerization, and sintering to consolidate the ceramic oxide material and removal the fugitive material.

公开(公告)号：US20180148187A1

公开(公告)日：2018-05-31

申请号：US15884507

申请日：2018-01-31

Applicant: Safran Nacelles

Inventor： Laurent Georges VALLEROY ,  Marc VERSAEVEL ,  Bertrand DESJOYEAUX ,  Patrick GONIDEC

IPC: F02K1/34 ,  G10K11/168 ,  B64D27/16 ,  B64D29/00

CPC classification number: B64D33/06 ,  B64D27/16 ,  B64D29/00 ,  B64D29/06 ,  F02K1/72 ,  F02K1/827 ,  F05D2260/96 ,  G10K11/168 ,  Y02T50/671

Abstract: The present disclosure particularly relates to an acoustic attenuation structure for a propulsion assembly of an aircraft. The acoustic attenuation structure includes an acoustically reflective wall and a sandwich panel. The sandwich panel includes a honeycomb structure surrounded by two acoustically porous skins, a rear skin and a skin. The acoustically reflective wall and the sandwich panel are arranged in such a way as to be separated by a layer of air.

公开(公告)号：US20170122204A1

公开(公告)日：2017-05-04

申请号：US15403658

申请日：2017-01-11

Applicant: SAFRAN NACELLES

Inventor： Marc VERSAEVEL ,  Arnaud DELEHOUZE ,  Laurence LEMAINS ,  Pierre-François BEHAGHEL

IPC: F02C7/047 ,  F01D25/24 ,  B64D33/02 ,  B64D15/04 ,  B64D29/00 ,  F02C7/045 ,  F01D25/10

CPC classification number: F02C7/047 ,  B64D15/04 ,  B64D29/00 ,  B64D33/02 ,  B64D2033/0206 ,  B64D2033/0233 ,  F01D25/10 ,  F01D25/24 ,  F02C7/045 ,  F05D2220/323

Abstract: A front lip of a turbofan engine nacelle is provided, defined at the rear by a partition wall, the lip comprising an annular de-icing space including a tube for supplying hot air in order to de-ice the outer walls thereof, said lip also including acoustic panels arranged on the wall thereof substantially radially facing the axis of the nacelle. The front lip includes hot-air outlet bores/piercings which are arranged between the front end of the lip and said acoustic panels, which allow a flow of hot air, from said annular space, forming a substantially regular film which covers said acoustic panels with a boundary layer in order to heat said acoustic panels.