Seanergy poster: Modeling hydrodynamic interactions between tidal turbines in the Alderney Race




Tidal stream energy sites cover relatively small surface areas (few km2). Tidal turbines will therefore be deployed close to each others, inducing significant flow interactions between devices. Thus, a reliable hydrodynamic characterisation of these interactions at the array-scale is of utmost importance for both optimizing the placement of devices and assessing turbines loading and energy output. However, approaching the flow within an array is a highly multiscale problem implying to consider various processes including, among others, the generation of turbulence in the wakes, the flow acceleration between turbines (due to the blockage effect) and the flow reduction in turbines wakes. In addition, simulations at larger temporal scales may be required to cover the wide range of realistic tidal flow conditions (e.g. neap/spring tidal cycles) and estimate reliably the energy yield over a long period of time (i.e. to assess the annual energy production).

Jérôme Thiébot, Sylvain Guillou, Nicolas Guillou, Nasteho Djama Dirieh