Article Dans Une Revue International Marine Energy Journal Année : 2025

Effects of non-isotropic blockage on a tidal turbine modeled with the Actuator-Line method

Résumé

This paper presents a study on the effects of non-isotropic blockage on a tidal turbine using numerical simulations. A tidal rotor was modeled with OpenFOAM using the Actuator-Line method under four different blockage ratios, four different aspect ratios, and four different tip-speed ratios. The study analyzes the blade-boundary interactions through observations on the rotor integrated loads and power, sectional forces, local angles of attack, and turbine wake characteristics. The simulations reveal that, while reducing aspect ratios (i.e., bringing the boundaries closer to the rotor) has a negative impact on performance at low blockage, increasing blockage reduces the influence of aspect ratio on time-averaged thrust and power. However, the changes in aspect ratio can result in significant thrust and power fluctuations in time, especially at blade sections close to the tip. On a local scale, the impact of aspect ratio is observed on angles of attack changes due to flow acceleration, especially close to the blade tip. The effects of blockage and aspect ratio can also be observed in the development of the turbine wake. The presence of boundaries limits the expansion of thee wake and its interaction with the surrounding velocity field, affecting wake recovery

Fichier principal
Vignette du fichier
Accepted_Mascrier_et_al_2025.pdf (2.11 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-05610273 , version 1 (11-05-2026)

Licence

Identifiants

Citer

Enzo Mascrier, Federico Zilic de Arcos, Grégory Pinon. Effects of non-isotropic blockage on a tidal turbine modeled with the Actuator-Line method. International Marine Energy Journal, 2025, 8 (1), pp.109-117. ⟨10.36688/imej.8.109-117⟩. ⟨hal-05610273⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

  • More