Simulating The Aerodynamic Performance Of Horizontal Axis Wind Turbine In Time Domain

Because it's the unique component of the wind turbines for getting energy from wind, the blade plays the important role in wind turbines. This paper researches the aerodynamic performance of the blade and the whole machine in the time domain.First of all, the wind speed records which accords with nature is required. This paper uses Auto-regressive moving-average (ARMA) model to simulate the wind records based on Von Karman spectral. During the process, firstly the model's order is identified. Thereby the ARMA model accords with the Von Karman spectral more. Then, the short-term wind speed model is set up after getting coefficients which satisfy the reversibility and stability. Through the analysis of simulation results of ARMA model and contrast with the other model, the conclusion is that the ARMA model can simulate wind speed records which satisfy the need of research.Then based on blade element momentum (BEM) theory, this paper uses the AeroDyn and YawDyn to calculate the aerodynamic performance of the blade and wind turbine. Two comparisons are made. One is whether considering the flap motion. The other comparison is made between the floating wind turbine and fixed wind turbine.The results show, for floating wind turbine, the generator power fluctuates more widely and the flap of the blades is more acute, although the aerodynamic loads of blade are smaller.