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Modélisation numérique et physique de la chaîne de récupération de l'énergie de la houle par un dispositif bord à quai

Abstract : The study of a quayside wave energy converter is proposed. A simplified model composed ofa rectangular buoy oscillating in heave motion and installed close to a vertical dike is developedusing three different models. An analytical model based on potential flow theory is developed inintermediate water depth. A numerical model resolving the Navier-Stokes equation is developed.Experimental tests are performed for different floater dimensions and are used as references for the two other models. The comparison between the three models presents the validity domain of the analytical model. The existence of non-linear effects acting on the floater behaviour is shown.At first, the impact of the system dimensions on the floater behaviour are highlighted and quantified. According to these results a correction of the analytical model is proposed. Moreover, the corrected analytical model is applied to the wave energy converter behaviour. Secondly, the overtoppings are expressed using the wave height between the dike and the floater (provided by analytical model) and the Van Der Meer formula (2002). These overtoppings are also estimated using experimental tests. The comparison of these two models shows the presence of strong load losses when the floater is close to the dike. In those cases the analytical model needs a correction taking into account these load losses. It is also shown that when at the same time the wave length is high and the toe clearance between the dike and the floater is small, the dike overtopping are reduced by the presence of the floater.
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Sixtine Neuvéglise. Modélisation numérique et physique de la chaîne de récupération de l'énergie de la houle par un dispositif bord à quai. Mécanique des fluides [physics.class-ph]. Normandie Université, 2018. Français. ⟨NNT : 2018NORMLH34⟩. ⟨tel-02019801⟩

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