Theoretical Modeling of Vertical-Axis Wind Turbine Wakes
AbstractIn this work, two different theoretical models for predicting the wind velocity downwind of an H-rotor vertical-axis wind turbine are presented. The first model uses mass conservation together with the momentum theory and assumes a top-hat distribution for the wind velocity deficit. The second model considers a two-dimensional Gaussian shape for the velocity defect and satisfies mass continuity and the momentum balance. Both approaches are consistent with the existing and widely-used theoretical wake models for horizontal-axis wind turbines and, thus, can be implemented in the current numerical codes utilized for optimization and real-time applications. To assess and compare the two proposed models, we use large eddy simulation as well as field measurement data of vertical-axis wind turbine wakes. The results show that, although both models are generally capable of predicting the velocity defect, the prediction from the Gaussian-based wake model is more accurate compared to the top-hat counterpart. This is mainly related to the consistency of the assumptions used in the Gaussian-based wake model with the physics of the turbulent wake development downwind of the turbine. View Full-Text
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Abkar, M. Theoretical Modeling of Vertical-Axis Wind Turbine Wakes. Energies 2019, 12, 10.
Abkar M. Theoretical Modeling of Vertical-Axis Wind Turbine Wakes. Energies. 2019; 12(1):10.Chicago/Turabian Style
Abkar, Mahdi. 2019. "Theoretical Modeling of Vertical-Axis Wind Turbine Wakes." Energies 12, no. 1: 10.
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