Vertical-axis wind turbines’ simpler design and low center of gravity make them ideal for floating wind applications. However, efficient design optimization of floating systems requires fast and accurate models. Low-fidelity vertical-axis turbine aerodynamic models, including double multiple streamtube and actuator cylinder theory, were created during the 1980s. Commercial development of vertical-axis turbines all but ceased in the 1990s until around 2010 when interest resurged for floating applications. Despite the age of these models, the original assumptions (2-D, rigid, steady, straight bladed) have not been revisited in full. When the current low-fidelity formulations are applied to modern turbines in the unsteady domain, aerodynamic load errors nearing 50% are found, consistent with prior literature. However, a set of steady and unsteady modifications that remove the majority of error is identified, limiting it near 5%. This paper shows how to reformulate the steady models to allow for unsteady inputs including turbulence, deforming blades, and variable rotational speed. A new unsteady approximation that increases numerical speed by 5 10 × is also presented. Combined, these modifications enable full-turbine unsteady simulations with accuracy comparable to higher-fidelity vortex methods, but over 5000 × faster.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Vertical-Axis Wind Turbine Steady and Unsteady Aerodynamics for Curved Deforming Blades


    Beteiligte:

    Erschienen in:

    AIAA Journal ; 60 , 1 ; 189-196


    Erscheinungsdatum :

    2021-08-10


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch







    Unsteady Blade Aerodynamics of a Vertical-axis Wind Turbine

    Makino, D. / Morishita, E. / Japan Society for Aeronautical and Space Services et al. | British Library Conference Proceedings | 1997


    Unsteady Flow Simulation and Dynamic Stall Around Vertical Axis Wind Turbine Blades

    Hamada, Kenich / Smith, Tomos / Durrani, Naveed et al. | AIAA | 2008