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).


    Access

    Download


    Export, share and cite



    Title :

    TURBOMACHINE À HÉLICES COAXIALES


    Additional title:

    TURBOMACHINE WITH COAXIAL PROPELLERS
    TURBOMASCHINE MIT KOAXIALEN PROPELLERN


    Contributors:

    Publication date :

    2023-01-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    French


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F04D Strömungsarbeitsmaschinen , NON-POSITIVE-DISPLACEMENT PUMPS



    TURBOMACHINE A HELICES COAXIALES

    DUBOIS ADRIEN / BINDER ANTHONY / VION LAURENCE | European Patent Office | 2020

    Free access

    DISPOSITIF DE PROPULSION A HELICES CONTRAROTATIVES ET COAXIALES NON-CARENEES

    DEJEU CLÉMENT MARCEL MAURICE / PASCAL SÉBASTIEN / TALBOTEC JÉRÔME et al. | European Patent Office | 2016

    Free access

    Doublet d'hélices coaxiales hélice unique

    Cristescu, Jean | TIBKAT | 1959



    Doublet d'hélices coaxiales hélice unique

    Cristescu, Jean | SLUB | 1959