In order to optimize the performance of a Wells turbine with fixed guide vanes, the designs of an end plate and a ring on the tip of the turbine rotor are proposed as penetrating blade tip treatments. In this study, numerical investigations are made using computational fluid dynamics (CFD)-based ANSYS Fluent software, and validated by corresponding experimental data. The flow fields are analyzed and non-dimensional coefficients CA, CT and η are calculated under steady-state conditions. Numerical results show that the stalling phenomenon on a ring-type Wells turbine occurs at a flow coefficient of ϕ = 0.36, and its peak efficiency can reach 0.54, which is 16% higher than that of an unmodified turbine and 9% higher than in the case of an endplate-type turbine. In addition, quasi-steady analysis is used to calculate the mean efficiency and output work of a wave cycle under sinusoidal flow conditions. As a result, it has been found that the ring-type turbine is superior to other types of Wells turbines.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Numerical study on Wells turbine with penetrating blade tip treatments for wave energy conversion


    Beteiligte:
    Ying Cui (Autor:in) / Beom-Soo Hyun (Autor:in)


    Erscheinungsdatum :

    2016




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    Numerical Analysis of Turbine Blade Tip Treatments

    Whitaker, Kevin W. / Gopalaswamy, Nath S. | SAE Technical Papers | 1992


    Numerical analysis of turbine blade tip treatments

    Gopalaswamy, N.S. / Whitaker, K.W. | Tema Archiv | 1992


    Wells turbine with end plates for wave energy conversion

    Takao, Manabu / Setoguchi, Toshiaki / Kinoue, Yoichi et al. | Tema Archiv | 2007


    The Wells Air Turbine for Wave Energy Conversion

    Raghunathan, S. | Online Contents | 1995