US 11,668,196 B2
Profiled structure for an aircraft or turbomachine
Fernando Gea Aguilera, Moissy-Cramayel (FR); Raphaël Barrier, Paris (FR); Mathieu Simon Paul Gruber, Moissy-Cramayel (FR); Cyril Polacsek, Clamart (FR); and Hélène Dominique Jeanne Posson, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR); and OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES, Palaiseau (FR)
Appl. No. 17/286,751
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR); and OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES, Palaiseau (FR)
PCT Filed Sep. 24, 2019, PCT No. PCT/FR2019/052237
§ 371(c)(1), (2) Date Apr. 19, 2021,
PCT Pub. No. WO2020/079335, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 1859664 (FR), filed on Oct. 18, 2018.
Prior Publication US 2021/0388725 A1, Dec. 16, 2021
Int. Cl. F01D 5/14 (2006.01); F01D 9/04 (2006.01); B64C 3/10 (2006.01); B64C 21/10 (2006.01)
CPC F01D 5/145 (2013.01) [B64C 3/10 (2013.01); B64C 21/10 (2013.01); F01D 9/041 (2013.01); B64C 2230/14 (2013.01); F05D 2220/323 (2013.01); F05D 2240/121 (2013.01); F05D 2240/122 (2013.01); F05D 2240/303 (2013.01); F05D 2250/183 (2013.01); F05D 2250/184 (2013.01); F05D 2260/961 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A profiled structure for an aircraft or for a turbomachine of an aircraft,
which is elongated in a direction of elongation in which the profiled structure has a length exposed to an airflow, and
which has a leading edge and/or a trailing edge, at least one of which being profiled, wherein the profiled leading edge and/or the profiled trailing edge has, along said direction of elongation, serrations defined by successive teeth and depressions extending transversely with respect to the direction of elongation,
wherein, along the profiled leading edge and/or the profiled trailing edge:
the successive teeth and depressions extend over only a part of said length exposed to the airflow, a remaining part of said length being smooth, and
over said part of the length, with the exception of zones comprising at most three successive teeth located at each of two ends of said part of the length, the serrations have variations in amplitude and/or in spacing between two successive vertices of teeth or of depressions, said variations being monotonic, and,
wherein, over at least a part of said length where serrations are present, the amplitude and/or the spacing between two successive vertices of teeth or vertices of depressions varies linearly, or quadratically, or hyperbolically, or exponentially, or logarithmically, wherein the varying occurs over three or more amplitudes and/or three or more spacings, respectively.