基于格子玻尔兹曼方法的风力机尾流特性研究

To study the wake characteristics of wind turbines, a numerical method based on lattice Boltzmann method (LBM) and the large eddy simulation (LES) method were used, and the wall-adapting local eddy (WALE) model was applied to simulate the wake of the New MEXICO wind turbine and investigate the model. Meanwhile, the wake structure of the NREL 5MW wind turbine under different turbulence intensities and dynamic inflow conditions of inflow was studied. The results show that the LBM method accurately simulates the velocity component of the experimental turbine and predicts the vortices, but the attached vortices in the middle of the blade dissipate faster. Under high turbulence inflow conditions, the tip vortices and root vortices of the wind turbine are destroyed earlier. Under dynamic inflow conditions, the wake vortices of the turbine dissipate slowly as the inflow velocity increases. In addition, the distance between the wake vortices increases, the continuous distance becomes longer, and the wake expansion effect is weakened. After the inflow wind speed changes for 10s, the thrust coefficient continues to fluctuate sharply.