Numerical Simulations of the NREL Phase VI Wind Turbine with Low-Amplitude Sinusoidal Pitch

Currently, most wind turbine performance analyses and simulations are performed assuming constant pitch yaw angles during each rotation. Nevertheless, induced vibration or rotor imbalance can affect the angle within In this study, effects of low-amplitude sinusoidal oscillations blade on a was investigated numerically by comparing it against baseline (without variations). Large eddy were in which motion blades handled curvilinear immersed boundary (CURVIB) method. The grid resolution increased near moving boundaries using dynamic overset grids to resolve rotating blades. It found that (up 3 degrees) negligibly affected mean torque but its fluctuations created distinct features wake turbine. fact, turbine’s at speed 15 m/s decreases from 1245 N.m 1223 N.m, while fluctuation (standard deviation) increases 2.85 7.94 with 0.5 degrees frequency 3.6 Hz.