An assessment of using variable blade pitch for moored ocean current turbine flight control

James H. VanZwieten, Parakram Pyakurel, Tri Ngo, Cornel Sultan, Nikolaos I. Xiros

Research output: Contribution to journalArticle

Abstract

This paper investigates the possibility of using active individual blade pitch control for positioning moored ocean current turbines within an array. Using a numerical simulation of a representative ocean current turbine it is shown that harmonic blade oscillations with amplitudes of 1.5° can be used to displace an ocean current turbine laterally by a distance equal to one rotor diameter, when the mooring cable length is approximately 30 times the diameter of the rotor blade. For current flow directions that would result in a downstream turbine operating in the wake of an upstream system at a distance of 10 diameters, this technique could be used to reduce the power loss of the downstream system from about 50% (caused by the reduced flow speed available in the turbine wake) to the 1.2% power loss associated with the suggested control approach.
Original languageEnglish
Pages (from-to)16-26
Number of pages11
JournalInternational Journal of Marine Energy
Volume13
DOIs
Publication statusPublished - 1 Apr 2016

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