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The influence of turbulence model and two and three-dimensional domain selection on the simulated performance characteristics of vertical axis tidal turbines

Citation

Marsh, P and Ranmuthugala, D and Penesis, I and Thomas, G, The influence of turbulence model and two and three-dimensional domain selection on the simulated performance characteristics of vertical axis tidal turbines, Renewable Energy, 105 pp. 106-116. ISSN 0960-1481 (2017) [Refereed Article]

Copyright Statement

Copyright 2016 Elsevier Ltd.

DOI: doi:10.1016/j.renene.2016.11.063

Abstract

The influence of Computational Fluid Dynamics (CFD) modeling techniques on the accuracy of fixed pitch vertical axis turbine power output predictions was investigated. Using Two-Dimensional (2D) and Three-Dimensional (3D) models, as well as the Baseline-Reynolds Stress Model (BSL-RSM) and the k-ω Shear Stress Transport (k-ω SST) model in its fully turbulent and laminar-to-turbulent formulation, differences in power output modeling accuracy were evaluated against experimental results from literature. The highest correlation was found using a 3D domain model that fully resolved the boundary layer combined with the k-ω SST laminar-to-turbulent model. The turbulent 3D fully resolved boundary layer k-ω SST model also accurately predicted power output for most rotational rates, at a significantly reduced computational cost when compared to its laminar-to-turbulent formulation. The 3D fully resolved BSL-RSM model and 3D wall function boundary layer k-ω SST model were found to poorly simulate power output. Poor output predictions were also obtained using 2D domain k-ω SST models, as they were unable to account for blade tip and strut effects. The authors suggest that 3D domain fully turbulent k-ω SST models with fully resolved boundary layer meshes are used for predicting turbine power output given their accuracy and computational efficiency.

Item Details

Item Type:Refereed Article
Keywords:tidal turbine, vertical axis turbine, computational fluid dynamics, turbulence model, computational domain, laminar-to-turbulent transition
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ocean Engineering
Objective Division:Energy
Objective Group:Renewable Energy
Objective Field:Tidal Energy
Author:Marsh, P (Mr Philip Marsh)
Author:Ranmuthugala, D (Professor Dev Ranmuthugala)
Author:Penesis, I (Associate Professor Irene Penesis)
ID Code:114809
Year Published:2017 (online first 2016)
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2017-02-28
Last Modified:2017-11-02
Downloads:0

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