Aerodynamic Performance Analysis Of Vertical Axis Wind Turbine Array

In this paper a spiral vertical axis wind turbine array model is established.The air foil of the vertical axis wind turbine is NACA0018.Based on the analysis of the performance of a single machine,a wind turbine with three blades,a diameter-to-height ratio of 2:3 and an optimal tip speed ratio of 2.4 is selected for the array simulation.The array simulation is divided into four parts,a horizontal two-unit interference array,a vertical three-unit interference array,an interference array of nine wind turbines and a large spatial array of 27 wind turbines.A commercial fluid mechanics software is used to carry out CFD numerical simulations based on the DES method.On the one hand,the unsteady aerodynamic performance of the spiral vertical axis wind turbine array is obtained.On the other hand,the influence of important geometric and aerodynamic parameters of the spiral vertical axis wind turbine on the aerodynamic performance of the array is analyzed by changing the tip speed ratio,the relative positions of the wind turbines,the number of wind turbines and the shape of the wind turbine array.The interference law in the horizontal direction,the interference law in the vertical direction and the multi-directional interference law in complex situations are further analyzed to fully understand and calculate the aerodynamic performance of the wind turbine array.