Verification and Validation of the Actuator Line Model for Wind Turbine Wakes
The wake effect of wind turbines has a significant impact on the design and operation of wind farms.The actuator line model based on CFD simulations,which utilizes the aerodynamic characteristics of airfoils,offers a more physically accurate simulation of wakes compared to semi-empirical wake models.However,the grid and turbulence models used in CFD simulations notably affect the performance of the actuator line model.Therefore,it is essential to verify the reliability of the actuator line model.Using the OpenFoam solver to solve the RANS equations and incorporating the actuator line model,this study conducts a numerical simulation of the wake field behind a single NREL 5 MW wind turbine.It analyzes the influence of five model constants in the k-ε model on the simulation results and provides a set of parameters that enhance the simulation effectiveness of the actuator line model.The study also examines the impact of the Gaussian distribution length factor,the number of actuation points,and the grid size on the results of the actuator line simulation,establishing a reasonable range for these settings.This research provides some reference standards for improving the accuracy of the actuator line model for wind turbine wake simulation.
wakeactuator line modelCFD simulationverification and validation
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