1 Introduction</h5> With the world supply of oil and gas fast depleting there is increasing interest and investment in the renewable energy sector. One such major source is the untapped energy coming from oceans in the form of tidal or wave energy. Systems for generating useful electricity from this vast energy resource are in development, typically comprising arrays or farms of tidal stream turbines (TST). Over the last decade, the design of tidal stream devices has progressed rapidly and several horizontal-axis turbines are now undergoing prototype trials at offshore test sites. However, there is limited understanding of how the loading, power output and wakes of TST are affected by the ambient turbulence of the tidal flows that are suitable for energy extraction. Full scale experimental or field measurements of such devices and their wakes are both costly and extremely difficult, particularly when considering the operating environment and the extent of reliable data required. An alternative to field measurements is computational fluid dynamics (CFD), which can give a detailed insight into the flow physics, thereby enabling design optimization that can lead to low-cost yet high-energy efficient devices. This paper aims to present a detailed CFD investigation via Reynolds Averaged
International Journal of Heat and Fluid Flow – Elsevier
Published: Oct 1, 2013
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