US 11,788,558 B2
Fan casing for an aircraft turbomachine directly incorporating abradable portions and having acoustic properties
Florent Louis Andre Rognin, Moissy-Cramayel (FR); Clement Bourolleau, Moissy-Cramayel (FR); Serge Domingues, Moissy-Cramayel (FR); Vincent Pascal Fiore, Moissy-Cramayel (FR); and Anwer Siraj, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/272,735
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Aug. 28, 2019, PCT No. PCT/FR2019/051988
§ 371(c)(1), (2) Date Mar. 2, 2021,
PCT Pub. No. WO2020/049243, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 1857910 (FR), filed on Sep. 4, 2018.
Prior Publication US 2021/0355962 A1, Nov. 18, 2021
Int. Cl. F04D 29/66 (2006.01); F04D 29/52 (2006.01)
CPC F04D 29/665 (2013.01) [F04D 29/522 (2013.01); F04D 29/526 (2013.01); F05D 2220/323 (2013.01); F05D 2230/30 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A fan casing for an aircraft turbomachine, said fan casing comprising a one-piece annular body, said one-piece annular body comprising a radially internal annular surface, a first annular portion of which is made of an abradable material, wherein a second annular portion of said internal surface comprises blind holes conferring acoustic properties to said second annular portion, the second annular portion and the body forming a monolithic piece.