Journal cover Journal topic
Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
Wind Energ. Sci., 2, 587-601, 2017
https://doi.org/10.5194/wes-2-587-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research articles
24 Nov 2017
Validation of the actuator disc approach using small-scale model wind turbines
Nikolaos Simisiroglou1,2, Simon-Philippe Breton2, and Stefan Ivanell2 1WindSim AS, Fjordgaten 15, 3125 Tønsberg, Norway
2Wind Energy Section, Uppsala University, Campus Gotland, 621 67 Visby, Sweden
Abstract. The aim of the present study is the validation of the implementation of an actuator disc (ACD) model in the computational fluid dynamics (CFD) code PHOENICS. The flow behaviour for three wind turbine cases is investigated numerically and compared to wind tunnel measurements: (A) the flow around a single model wind turbine, (B) the wake interaction between two in-line model wind turbines for a uniform inflow of low turbulence intensity and (C) the wake interaction between two in-line model wind turbines at different separation distances in a uniform or sheared inflow of high turbulence intensity. This is carried out using Reynolds-averaged Navier–Stokes (RANS) simulations and an ACD technique in the CFD code PHOENICS. The computations are conducted for the design condition of the rotors using four different turbulence closure models and five different thrust distributions. The computed axial velocity field as well as the turbulence kinetic energy are compared with hot-wire anemometry (HWA) measurements. For the cases with two in-line wind turbines, the thrust coefficient is also computed and compared with measurements. The results show that for different inflow conditions and wind turbine spacings the proposed method is able to predict the overall behaviour of the flow with low computational effort. When using the k-ε and Kato–Launder k-ε turbulence models the results are generally in closer agreement with the measurements.

Citation: Simisiroglou, N., Breton, S.-P., and Ivanell, S.: Validation of the actuator disc approach using small-scale model wind turbines, Wind Energ. Sci., 2, 587-601, https://doi.org/10.5194/wes-2-587-2017, 2017.
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