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Three dimensional numerical simulations of a straight-bladed vertical axis tidal turbine


Marsh, P and Ranmuthugala, D and Penesis, I and Thomas, G, Three dimensional numerical simulations of a straight-bladed vertical axis tidal turbine, Proceedings of the 18th Australasian Fluid Mechanics Conference, 3-7 December 2012, Lauceston, Tasmania, Australia, pp. 1-4. ISBN 9780646583730 (2012) [Refereed Conference Paper]

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Copyright 2012 Leishman Associates

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The generation of power from our oceans is moving to the forefront in our quest for clean and sustainable energy, and for tidal power vertical axis turbine designs are eminently suitable. Research into these turbines however has lagged behind that of other designs, and further research into their hydrodynamic flow and loading characteristics through the use of Computational Fluid Dynamics (CFD) and Experimental Fluid Dynamics (EFD) is needed to improve their efficiency and longevity. Previous CFD tidal turbine simulations have used Two-Dimensional (2D) simulation models; this work extends these simulations using Three-Dimensions (3D) to fully capture turbine flow characteristics, loading and performance parameters. These transient simulations were performed using a commercial Reynolds Averaged Navier-Stokes (RANS) solver. Theoretical momentum based models have also been developed for comparison. At low tip speed ratio (l) both CFD and momentum models predicted turbine power accurately when compared to experimental results, but as l increases CFD models without struts and momentum simulation models showed increasing simulation error due largely to strut drag effects that were not accounted for. The highest level of prediction accuracy across all l ranges was determined by the use of a 3D CFD model with struts due to the inclusion of the resultant strut drag effects.

Item Details

Item Type:Refereed Conference Paper
Keywords:hydrodynamcis, tidal energy, vertical axis turbine, computational fluid dynamics
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ocean engineering
Objective Division:Energy
Objective Group:Renewable energy
Objective Field:Tidal energy
UTAS Author:Marsh, P (Mr Philip Marsh)
UTAS Author:Ranmuthugala, D (Professor Dev Ranmuthugala)
UTAS Author:Penesis, I (Professor Irene Penesis)
UTAS Author:Thomas, G (Professor Giles Thomas)
ID Code:81609
Year Published:2012
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2012-12-18
Last Modified:2017-07-18
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