The influence of the pitch to diameter ratio (P/D) on a novel tidal turbine performance

Author(s): Roslynna Rosli a, Rosemary Normanb, Mehmet Atlarc
a Universiti Teknologi Brunei, Bandar Seri Begawan BE 1410, Brunei Darussalam
b Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
University of Strathclyde, Glasgow G4 0LZ, United Kingdom
International Journal of Smart Grid and Clean Energy, vol. 9, no. 1, January 2020: pp. 224-229
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.9.1.224-229

Abstract: Computational Fluid Dynamics (CFD) offers numerical modeling investigating the performance that can be used other than or in tandem with experimental investigation. In order to offer meaningful results, the grid sensitivity test or Grid Convergence Index are usually carried out to ensure the solutions converging. This paper presents both grid sensitivity test results and the GCI calculation of a same numerical model exercised to investigate the performance of a tidal turbine, the Hydro-Spinna, with different P/D ratio. The CGI calculation presented the fine grid relative error to be 2.34% for the power coefficient and 2.28% for the thrust coefficient at their optimal TSR respectively. It was found that turbine with lowest P/D ratio has the highest power and thrust coefficient as well as TSR operational range. The turbine with P/D = 0.43 gives a power coefficient of 0.32 at the optimal TSR of 2.25.

Keywords: tidal turbine, numerical, performance, validation, grid convergence index
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