A propulsion device including an unducted upstream propeller and a counter-rotating and coaxial downstream propeller. At least one blade of the upstream propeller is configured to generate a corotating secondary vortex for acting upstream of the downstream propeller to destabilize a blade tip vortex of the same at least one blade.


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    Title :

    Propulsion device having unducted counter-rotating and coaxial rotors



    Publication date :

    2017-03-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F01D Strömungsmaschinen [Kraft- und Arbeitsmaschinen oder Kraftmaschinen], z.B. Dampfturbinen , NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES / F02C Gasturbinenanlagen , GAS-TURBINE PLANTS




    Noise directivity of unducted counter rotating propfans

    Loelgen, Th. / Neuwerth, G. | AIAA | 1993


    UNDUCTED PROPULSION SYSTEM

    TWEEDT DANIEL L / KHALID SYED ARIF | European Patent Office | 2023

    Free access

    Noise Directivity of Unducted Counter Rotating Propfans

    Loelgen, T. / Neuwerth, G. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1993


    Unducted propulsion system

    TWEEDT DANIEL L / KHALID SYED ARIF | European Patent Office | 2023

    Free access