The invention relates to a nubomachine with a longitudinal axis, comprising two, respectively upstream (122) and downstream, coaxial outer propellers (122), characterised in that at least some of the blades (148) of the upstream propeller (122) comprise at least one internal air circulation chimney (150) that communicates with air-bleeding openings (152) in tire boundary layers of the blades (148), and communicates with air outflow openings (158) on the radially outer end thereof, the air-bleeding openings (152) leading to opening inlets (152a) on tire passive surfaces (156) of the blades (148), the inlets (152a) of the air-bleeding openings being radially arranged in an area (H1) contained between 10% and 45% of the radial dimension (H2) of the blades (148), measured above turd from the radial height of the blades for which the tangent of the leading edge (138) of the blades is orthogonal to the longitudinal axis, and the inlets (152a) of the air bleeding openings being arranged in an area contained between 0% and 30% of the local chord of the blades (148), measured at the level of said inlets (152a) and from the leading edges (138) of tire blades (148).
TURBOMACHINE À HÉLICES COAXIALES
TURBOMACHINE WITH COAXIAL PROPELLERS
TURBOMASCHINE MIT KOAXIALEN PROPELLERN
2023-01-11
Patent
Electronic Resource
French
DISPOSITIF DE PROPULSION A HELICES CONTRAROTATIVES ET COAXIALES NON-CARENEES
European Patent Office | 2016
|Doublet d'hélices coaxiales hélice unique
TIBKAT | 1959
|ENSEMBLE ROTOR AVEC DEUX HELICES CONTRE-ROTATIVES COAXIALES ET A PAS VARIABLE POUR MOTEURS D'AVIONS
European Patent Office | 2019
|Doublet d'hélices coaxiales hélice unique
SLUB | 1959
|