公开(公告)号：US20210355962A1

公开(公告)日：2021-11-18

申请号：US17272735

申请日：2019-08-28

Applicant: SAFRAN AIRCRAFT ENGINES

Inventor： Florent Louis Andre ROGNIN ,  Clement BOUROLLEAU ,  Serge DOMINGUES ,  Vincent Pascal FIORE ,  Anwer SIRAJ

IPC: F04D29/52 ,  F02C6/20 ,  F04D19/00

Abstract: The invention relates to a fan casing (200) for an aircraft turbomachine, such as a jet engine, said casing having a one-piece annular body (202), said body having a radially internal annular surface (206), a first annular portion (208) of which is made of abradable material, characterized in that a second annular portion (210) of said internal surface comprises blind holes (212) that confer acoustic properties on said second portion.