US 12,281,613 B2
Turbofan engine with at least one guide vane including a variable-geometry zone
Vincent Marie Jacques Rémi De Carné-Carnavalet, Moissy-Cramayel (FR); and Guillaume Olivier Vartan Martin, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/248,211
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Oct. 18, 2021, PCT No. PCT/FR2021/051808
§ 371(c)(1), (2) Date Apr. 6, 2023,
PCT Pub. No. WO2022/084611, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 2010841 (FR), filed on Oct. 22, 2020.
Prior Publication US 2023/0374940 A1, Nov. 23, 2023
Int. Cl. F02C 7/042 (2006.01); F02C 7/18 (2006.01); F02K 3/06 (2006.01)
CPC F02C 7/042 (2013.01) [F02C 7/18 (2013.01); F02K 3/06 (2013.01); F05D 2220/323 (2013.01); F05D 2250/90 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A turbojet engine, comprising:
a primary duct and a secondary duct surrounding the primary duct;
a row of guide vanes extending in the secondary duct downstream of a fan;
a profiled casing extending in the secondary duct downstream of the row of guide vanes, the profiled casing configured to house at least one conduit; and
at least one air sampling scoop located at the profiled casing and equipped with a regulation valve,
wherein at least one guide vane located proximate to the profiled casing includes a variable-geometry zone, a geometry of which can be adjusted during operation, and
wherein the at least one guide vane includes at least one pivotable zone around a pivot, a pivot angle of which can be controlled according to a pitch law taking into account a degree of opening of the regulation valve equipping the at least one air sampling scoop or a flow rate of air crossing the at least one air sampling scoop.