ABSTRACT In this study, flow-driven rotor simulations with a given load are conducted to analyze the operational characteristics of a vertical-axis Darrieus turbine, specifically its self-starting capability and fluctuations in its torque as well as the RPM. These characteristics are typically observed in experiments, though they cannot be acquired in simulations with a given tip speed ratio (TSR). First, it is shown that a flow-driven rotor simulation with a two-dimensional (2D) turbine model obtains power coefficients with curves similar to those obtained in a simulation with a given TSR. 3D flowdriven rotor simulations with an optimal geometry then show that a helical-bladed turbine has the following prominent advantages over a straight-bladed turbine of the same size: an improvement of its self-starting capabilities and reduced fluctuations in its torque and RPM curves as well as an increase in its power coefficient from 33% to 42%. Therefore, it is clear that a flow-driven rotor simulation provides more information for the design of a Darrieus turbine than a simulation with a given TSR before experiments.


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    Titel :

    Flow-driven rotor simulation of vertical axis tidal turbines: A comparison of helical and straight blades


    Beteiligte:
    Le, Tuyen Quang (Autor:in) / Lee, Kwang-Soo (Autor:in) / Park, Jin-Soon (Autor:in) / Ko, Jin Hwan (Autor:in)


    Erscheinungsdatum :

    2014




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Klassifikation :

    BKL:    55.40 Schiffstechnik, Schiffbau / 50.92 Meerestechnik, Meerestechnik / 55.40 Schiffstechnik, Schiffbau, Schiffstechnik, Schiffbau / 50.92 Meerestechnik



    Flow-driven rotor simulation of vertical axis tidal turbines: A comparison of helical and straight blades

    Le Tuyen Quang / Lee Kwang-Soo / Park Jin-Soon et al. | DOAJ | 2014

    Freier Zugriff

    Flow-driven rotor simulation of vertical axis tidal turbines: A comparison of helical and straight blades

    Tuyen Quang Le / Kwang-Soo Lee / Jin-Soon Park et al. | DOAJ | 2014

    Freier Zugriff

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