Robust validation of a generalised actuator disk CFD model for tidal turbine analysis using the FloWave ocean energy research facility. (May 2022)

• Record Type: Journal Article
• Authors: Badoe, Charles E.; Edmunds, Matt; Williams, Alison J.; Nambiar, Anup; Sellar, Brian; Kiprakis, Aristides; Masters, Ian
• Is Part Of: Renewable energy. Volume 190(2022)
• Page Start: 232
• Page End: 250
• Publication Date: 2022-05
• Subjects: FloWave -- GAD-CFD -- Blade element momentum -- Tidal energy -- Tidal turbine -- Horizontal axis turbine; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2022.03.109
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: Coupled blade element momentum-computational fluid dynamic (BEM-CFD) approaches have been extensively used to study tidal stream turbine performance and wake development. These approaches have shown to be accurate when compared to tests conducted in tow-tanks or in regulated flumes with uniform flows across the turbine. Whilst such studies can be very useful, it is questionable as to what extent the results would differ in a larger scale environment where the flow is more representative of real-world conditions, being either unsteady or non-uniform. In this work, the effectiveness of a generalised actuator disk-computational fluid dynamics (GAD-CFD) approach in accurately capturing fluid-machine interaction for single and multiple tidal energy converters models is further assessed. A unique large-scale experimental facility, FloWave, has been used to conduct physical testing of three instrumented model tidal energy converters of rotor diameter 1.2 m under differing turbine layouts and realistic scaled environmental conditions. These large-scale tests provide a unique dataset against which this work's numerical simulations have been extensively validated. Comparisons between the tank and GAD-CFD approach show good agreement, particularly when comparing modelled to measured thrust, and enabled an evaluation of the effects of turbine spacing and arrangement on turbine performance and flow-field response.