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Lookup NU author(s): Hao Chen, Dr Weichao ShiORCiD
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© 2025This paper presents a comparative study on the hydrodynamic and energy-harvesting performance of an array of taut-moored point-absorber wave energy converters (WECs) in monochromatic waves. Both a computational fluid dynamics (CFD) model and a potential-flow based boundary element model (BEM) are employed in the present analysis, and the power take-offs are derived based on the heave motion of the WECs. The linear components are extracted from the CFD model's nonlinear response to facilitate comparison with the BEM results. It is found that the BEM model with viscous damping effectively captures the linear heave motion and energy absorption across the frequency range, showing good agreement with the CFD data. However, there are discrepancies in the pitch and surge resonance periods. In addition to the linear component, the CFD model provides valuable insights into the nonlinear behaviour of WECs, particularly highlighting strong slow-drift motion in surge and higher-order harmonics in pitch. The slow-drift motion in the surge is primarily detected in the front-row WECs in short waves, diminishing rapidly towards the rear of the array. In contrast, higher-order harmonics in pitch motion are observed consistently across all WECs in the array in long waves.
Author(s): Chen H, Liang H, Lin Z, Li Y, Shi W
Publication type: Article
Publication status: Published
Journal: Energy
Year: 2025
Volume: 337
Print publication date: 15/11/2025
Online publication date: 20/09/2024
Acceptance date: 15/09/2025
ISSN (print): 0360-5442
ISSN (electronic): 1873-6785
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.energy.2025.138546
DOI: 10.1016/j.energy.2025.138546
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