A design methodology for contrarotating propellers has been developed based on rational hydromechanics. Three fundamental principles need to be satisfied: momentum, mass, and circulation conservation. Momentum conservation requires the net force generated by the contrarotating propeller to be balanced by the drag of the bare body and the drag due to hull-propulsor interaction. Mass conservation determines the circulation distribution of the aft propeller once the forward propeller circulation distribution is specified. Circulation conservation determines the magnitude of the circulation distribution of the aft propeller to ensure the proper thrust and torque ratios. The effects of the hub boundaries have been taken into account in the design and analysis methods. A contrarotating propeller set was designed for uniform flow at the operating point of the propeller for a high speed surface ship. Open water results show that the performance predictions agree well with the measurements. (KR)


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Design Method and an Application for Contrarotating Propellers


    Beteiligte:
    B. Y. H. Chen (Autor:in) / A. M. Reed (Autor:in)

    Erscheinungsdatum :

    1990


    Format / Umfang :

    29 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Paramotor with contrarotating propellers

    LACAZE ALBERTO DANIEL / MURPHY KARL NICHOLAS / BECKER WILLIAM et al. | Europäisches Patentamt | 2024

    Freier Zugriff

    Paramotor with Contrarotating Propellers

    LACAZE ALBERTO DANIEL / MURPHY KARL NICHOLAS / BECKER WILLIAM et al. | Europäisches Patentamt | 2022

    Freier Zugriff


    Contrarotating and Tandem CLT Propellers

    Perez-Gomez, G. / Gonzalez-Adalid, J. / SNAME et al. | British Library Conference Proceedings | 1994


    Lifting-Surface Program for Contrarotating Propellers

    B. Y.-H. Chen / A. M. Reed | NTIS | 1989