Enhancing performance of a horizontal axis tidal turbine using adaptive blades
Nicholls-Lee, Rachel and Turnock, Stephen R. (2007) Enhancing performance of a horizontal axis tidal turbine using adaptive blades. In, OCEANS 2007 - Europe. USA, Institute of Electrical and Electronics Engineers, 1-6. (doi:10.1109/OCEANSE.2007.4302437).
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Free stream tidal turbines are a source of growing interest in the marine renewable energy field. Some designs use variable pitch blade control devices in order to maximize the efficiency of the turbines; however these are complex to design, construct and maintain under the severe load conditions sub sea devices experience. Adaptive materials have been used in the wind industry to create bend-twist coupled blades in an effort to bring turbine efficiency ever closer to the Betz limit, and increase annual energy capture. This work encompasses a feasibility study, focusing on hydrodynamic performance calculations, wherein the blade geometry is artificially reconfigured as a function of flow velocity. The pressure distribution over the blade is also analysed. The concept of a passively adaptive tidal turbine blade is shown to increase annual energy capture, reduce blade loading and delay cavitation inception.
|Item Type:||Book Section|
|Keywords:||adaptive systems, cavitation, marine, renewable energy, tidal power generation, turbines|
|Subjects:||T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TJ Mechanical engineering and machinery
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Fluid-Structure Interactions
|Date Deposited:||02 Oct 2007|
|Last Modified:||08 Jun 2012 12:17|
|Publisher:||Institute of Electrical and Electronics Engineers|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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