The present study investigates the capability of the actuator surface model in simulation and parametric study of oscillating turbines while using a developed CFD code. For this purpose, a control volume-based finite element method (CVFEM) is developed for dynamic stall and actuator surface models. The models are implemented in an in-house computational fluid dynamics (CFD) code for unsteady two-dimensional flows. At first, the temporal evolution of the power and force coefficients and mean power were compared with a full CFD study of the same cases. The results indicate that this technique provides good accuracy while reducing computational costs. A comprehensive parametric study is then conducted to understand the effect of influencing parameters. It is found that the effects of changes in parameters such as heaving amplitude and pitching center location are well captured by the proposed model. After validating the method, the time evolution of the vorticity and pressure fields are provided. Although this model replaces the geometry of the real blade by body forces distributed along lines, it accurately predicts the time evolution of the vorticity and pressure fields. Finally, the proposed model is used to calculate the map of efficiency. The success of this map in finding the optimal operating range of oscillating turbines suggests that this method will be a suitable technique for simulating oscillating turbines.
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