The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 2023
Filed:
Jul. 26, 2019
Safran Aircraft Engines, Paris, FR;
Adrien Dubois, Moissy-Cramayel, FR;
Anthony Binder, Moissy-Cramayel, FR;
Laurence Francine Vion, Moissy-Cramayel, FR;
SAFRAN AIRCRAFT ENGINES, Paris, FR;
Abstract
The invention relates to a nubomachine with a longitudinal axis, comprising two, respectively upstream () and downstream, coaxial outer propellers (), characterised in that at least some of the blades () of the upstream propeller () comprise at least one internal air circulation chimney () that communicates with air-bleeding openings () in tire boundary layers of the blades (), and communicates with air outflow openings () on the radially outer end thereof, the air-bleeding openings () leading to opening inlets () on tire passive surfaces () of the blades (), the inlets () of the air-bleeding openings being radially arranged in an area (H) contained between 10% and 45% of the radial dimension (H) of the blades (), measured above turd from the radial height of the blades for which the tangent of the leading edge () of the blades is orthogonal to the longitudinal axis, and the inlets () of the air bleeding openings being arranged in an area contained between 0% and 30% of the local chord of the blades (), measured at the level of said inlets () and from the leading edges () of tire blades ().