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：US20210179256A1

公开(公告)日：2021-06-17

申请号：US17188482

申请日：2021-03-01

Applicant: Safran Nacelles

Inventor： Bertrand Leon Marie DESJOYEAUX ,  Julien LORRILLARD ,  Benjamin PROVOST

IPC: B64C7/02 ,  B29B11/16 ,  B29C70/22

Abstract: A method for manufacturing a preform for producing a part made of composite material with an unchangeable final shape includes supplying a triaxial non-woven textile comprising a layer of fibers orientated in a first direction, a layer of fibers orientated in a second direction, a layer of fibers orientated in a third direction, and seams extending parallel to each other and forming sheaths for the circumferential fibers, arranging the textile on an element of unchangeable shape by placing the seams parallel to the circumferential direction of the element, and sliding the circumferential fibers into the sheaths so that the textile is in continuous contact with the element.