US 12,269,604 B2
Defrosting and acoustic treatment device for an air intake lip of a turbojet engine nacelle
Virginie Emmanuelle Anne Marie Digeos, Gonfreville l'Orcher (FR); and Patrick Boileau, Gonfreville l'Orcher (FR)
Assigned to Safran Nacelles, Gonfreville l'Orcher (FR)
Filed by Safran Nacelles, Gonfreville l'Orcher (FR)
Filed on Aug. 12, 2020, as Appl. No. 16/991,636.
Application 16/991,636 is a continuation of application No. PCT/FR2019/050286, filed on Feb. 8, 2019.
Prior Publication US 2020/0369401 A1, Nov. 26, 2020
Int. Cl. B64C 33/02 (2006.01); B64D 15/04 (2006.01); B64D 33/02 (2006.01); B64D 29/06 (2006.01); F02C 7/047 (2006.01)
CPC B64D 33/02 (2013.01) [B64D 15/04 (2013.01); B64D 29/06 (2013.01); B64D 2033/0206 (2013.01); B64D 2033/0233 (2013.01); B64D 2033/0286 (2013.01); F02C 7/047 (2013.01); F05D 2220/323 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A nacelle for a turbojet engine, the nacelle comprising:
an air intake lip including an acoustic skin;
a defrosting and acoustic treatment device for the air intake lip, the defrosting and acoustic treatment device comprising a waffle acoustic structure adapted to bear on the acoustic skin of the air intake lip, and delimiting a plurality of acoustic cells, each acoustic cell being delimited by an independent peripheral wall that defines a top surface opposing the acoustic skin, each acoustic cell being tapered from the acoustic skin to the top surface such that the top surface of each acoustic cell is spaced apart and disconnected from the top surfaces of adjacent ones of the acoustic cells to define a space therebetween, a defrost air being allowed to be directed into the space from above the top surface to flow around each acoustic cell,
wherein the waffle acoustic structure delimits at least two rows of acoustic cells connected together by at least one connecting portion adapted to bear on the acoustic skin of the air intake lip, the acoustic cells being made in one piece with the at least one connecting portion, each connecting portion being a strip that has a main surface parallel to the acoustic skin and matching a shape of the air intake lip, and
wherein the acoustic skin includes perforations, the perforations being covered by each of the acoustic cells and the at least one connecting portion.