Tidal Energy
Tidal Turbine
Horizontal-Axis Tidal Turbine Design Based On 3d Hydrodynamics
International Marine Energy Journal
Published: June 22, 2022
Keywords:
Marine Renewable Energy, Tidal Turbines, Design, Hydrodynamics, Boundary Integral Equation Model, Annual Energy Production
Abstract
A computational procedure for the hydrodynamic analysis and design of horizontal-axis tidal turbines is presented and numerical applications are discussed. The methodology combines an original design algorithm and a turbine hydrodynamics model valid for arbitrary 3D flows. Unlike standard design methods based on blade element models, 3D-flow corrections are unnecessary. Blade geometry parameters are determined with the objective to maximize power at a given design Tip Speed Ratio (TSR), whereas a constraint is introduced to limit turbine thrust at TSR higher than the design condition. Numerical applications include the design of a laboratory-scale turbine and a full-scale turbine for the exploitation of tidal streams in the Messina strait. Alternative design solutions obtained by varying the design TSR are compared in terms of energy output as well as mechanical loads transferred to the powertrain.
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