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Modélisation de parcs d'hydroliennes à flux transverse avec une méthode d'équivalence

Abstract : Harnessing kinetic energy from oceans or rivers is a promising source of renewable energy. The hydrodynamical performance of water turbines is well known and the focus is now on array optimization and turbine interaction. The present document aims to introduce a new modeling solution for vertical axis water current turbine of Darrieus/Achard type and its construction methodology. A preliminary stage consists in the validation of the new sliding mesh method available in Code_Saturne, EDF CFD open source solver. The good results obtained by comparison with PIV measurements on the Achard type turbine allow the use of this method as a reference tool. The second stage sees the construction of an equivalence model for the Darrieus turbine using momentum source terms. These terms are calculated thanks to an efficient parametrization of empirical data. The comparison of the model with full geometry calculation shows a good agreement in terms of power for a wide range of rotational velocity and blocking ratio. LDV measurements in the near wake of a small scale Achard turbine give a necessary reference set of data. The wake given by both simulations is strongly dependent of turbulence parameters or models, with the cohabitation of two main phenomena : momentum turbulent diffusion, and large scale fluctuations. To conclude, a calculation of the power output for several turbine distributions in an array illustrates the model capability.
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  • HAL Id : tel-01127154, version 1

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Guillaume Mercier. Modélisation de parcs d'hydroliennes à flux transverse avec une méthode d'équivalence. Mécanique des fluides [physics.class-ph]. Université de Grenoble, 2014. Français. ⟨NNT : 2014GRENI061⟩. ⟨tel-01127154⟩

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