US 12,234,790 B2
Air inlet for an aircraft propulsion unit comprising mobile members for promoting a thrust reversal phase, and method for using such an air inlet
Ulrick Souveton, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/561,051
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jun. 2, 2022, PCT No. PCT/EP2022/065138
§ 371(c)(1), (2) Date Nov. 15, 2023,
PCT Pub. No. WO2022/263203, PCT Pub. Date Dec. 22, 2022.
Claims priority of application No. 2106215 (FR), filed on Jun. 13, 2021.
Prior Publication US 2024/0254945 A1, Aug. 1, 2024
Int. Cl. F02K 1/72 (2006.01); F02C 7/04 (2006.01)
CPC F02K 1/72 (2013.01) [F02C 7/04 (2013.01); F05D 2220/323 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An air inlet of a nacelle of an aircraft propulsion unit, said aircraft propulsion unit extending along a longitudinal axis oriented from upstream to downstream and comprising a turbine engine comprising a radially inner primary duct and a radially outer bypass duct configured to guide from upstream to downstream respectively a primary air flow and a bypass air flow during a thrust phase, said turbine engine comprising upstream a fan rotatably mounted about the longitudinal axis, said aircraft propulsion unit comprising thrust inversion means configured to modify the bypass air flow into a reverse air flow circulating from downstream to upstream in the bypass duct during a thrust reversal phase, said nacelle extending outwardly around the turbine engine and comprising at its upstream end the air inlet, said air inlet comprising an inner wall turned towards the longitudinal axis, an outer wall opposite the inner wall and an air inlet lip connecting upstream the inner wall and the outer wall, wherein:
the inner wall defines a plurality of openings comprising an upstream end and a downstream end, and
the air inlet comprises a plurality of mobile members, a mobile member of the plurality of mobile members being mounted pivoting in each opening of the plurality of openings, each of the mobile members comprising a covering wall and a deflecting wall opposite the covering wall and being configured to pivot between:
a covering position, wherein the covering wall is turned towards the longitudinal axis, obstructs the opening and extends along the inner wall so as to guide the bypass air flow in order to promote the thrust phase, and
a deflecting position, wherein the deflecting wall is turned towards the longitudinal axis, obstructs the opening and is configured to separate the reverse air flow in order to promote the thrust reversal phase.