Next Article in Journal
Robust Adaptive Heading Control for a Ray-Type Hybrid Underwater Glider with Propellers
Next Article in Special Issue
The Development of Marine Energy Extraction
Previous Article in Journal
Evaluation of Lebanon’s Offshore-Wind-Energy Potential
Previous Article in Special Issue
Life Cycle Assessment of Ocean Energy Technologies: A Systematic Review
 
 
Article

Validation of Tidal Stream Turbine Wake Predictions and Analysis of Wake Recovery Mechanism

1
Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS 39759, USA
2
School of Engineering, University of South Wales, Treforest, Wales CF37 1DL, UK, [email protected]
3
School of Engineering, Cardiff University, Cardiff, Wales CF24 2FN, UK
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2019, 7(10), 362; https://doi.org/10.3390/jmse7100362
Received: 30 August 2019 / Revised: 7 October 2019 / Accepted: 8 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue The Development of Marine Energy Extraction)
This paper documents the predictive capability of rotating blade-resolved unsteady Reynolds averaged Navier-Stokes (URANS) and Improved Delayed Detached Eddy Simulation (IDDES) computations for tidal stream turbine performance and intermediate wake characteristics. Ansys/Fluent and OpenFOAM simulations are performed using mixed-cell, unstructured grids consisting of up to 11 million cells. The thrust, power and intermediate wake predictions compare reasonably well within 10% of the experimental data. For the wake predictions, OpenFOAM performs better than Ansys/Fluent, and IDDES better than URANS when the resolved turbulence is triggered. The primary limitation of the simulations is under prediction of the wake diffusion towards the turbine axis, which in return is related to the prediction of turbulence in the tip-vortex shear layer. The shear-layer involves anisotropic turbulent structures; thus, hybrid RANS/LES models, such as IDDES, are preferred over URANS. Unfortunately, IDDES fails to accurately predict the resolved turbulence in the near-wake region due to the modeled stress depletion issue. View Full-Text
Keywords: tidal stream turbine; rotating blade-resolved turbine; turbulence models; wake predictions tidal stream turbine; rotating blade-resolved turbine; turbulence models; wake predictions
Show Figures

Figure 1

MDPI and ACS Style

Salunkhe, S.; El Fajri, O.; Bhushan, S.; Thompson, D.; O’Doherty, D.; O’Doherty, T.; Mason-Jones, A. Validation of Tidal Stream Turbine Wake Predictions and Analysis of Wake Recovery Mechanism. J. Mar. Sci. Eng. 2019, 7, 362. https://doi.org/10.3390/jmse7100362

AMA Style

Salunkhe S, El Fajri O, Bhushan S, Thompson D, O’Doherty D, O’Doherty T, Mason-Jones A. Validation of Tidal Stream Turbine Wake Predictions and Analysis of Wake Recovery Mechanism. Journal of Marine Science and Engineering. 2019; 7(10):362. https://doi.org/10.3390/jmse7100362

Chicago/Turabian Style

Salunkhe, Sanchit, Oumnia El Fajri, Shanti Bhushan, David Thompson, Daphne O’Doherty, Tim O’Doherty, and Allan Mason-Jones. 2019. "Validation of Tidal Stream Turbine Wake Predictions and Analysis of Wake Recovery Mechanism" Journal of Marine Science and Engineering 7, no. 10: 362. https://doi.org/10.3390/jmse7100362

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop