A numerical structural analysis of ducted, high-solidity, fibre-composite tidal turbine rotor configurations in real flow conditions

Mitchell G. Borg, Qing Xiao, Steven Allsop, Atilla Incecik, Christophe Peyrard

Research output: Contribution to journalArticlepeer-review

Abstract

Establishing a design and material evaluation of unique tidal turbine rotors in true hydrodynamic conditions by means of a numerical structural analysis has presented inadequacies in implementing spatial and temporal loading along the blade surfaces. This study puts forward a structural performance investigation of true-scale, ducted, high-solidity, fibre-composite tidal turbine rotor configurations in aligned and yawed flows by utilising outputs from unsteady blade-resolved computational fluid dynamic models as boundary condition loads within a finite-element numerical model. In implementation of the partitioned-approach fluid–structure interaction procedure, three distinct internal blade designs were analysed. Investigating criteria related to structural deformation and induced strains, hydrostatic & hydrodynamic analyses are put forward in representation of the rotor within the flow conditions at the installation depth. The resultant axial deflections for the proposed designs describe a maximum deflection-to-bladespan ratio of 0.04, inducing a maximum strain of 0.9%. A fatigue response analysis is undertaken to acknowledge the blade material properties required to prevent temporal failure.

Original languageEnglish
Article number109087
JournalOcean Engineering
Volume233
Early online date31 May 2021
DOIs
Publication statusPublished - 1 Aug 2021

Keywords

  • structural analysis
  • fluid-structure interaction
  • high-solidity
  • open-centre
  • tidal turbine
  • ducted turbine
  • fibre-composite

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