Dynamic Response of a Darrieus Rotor Wind Turbine Subject to Turbulent Flow

A method is presented for the frequency response analysis of a Darrieus rotor wind turbine subject to turbulent flow. A number of time series vectors of longitudinal and lateral turbulent velocities are generated and the interaction with a two-bladed rotor is carried out with a double multiple streamtube model. The resulting time domain loads are transformed into the frequency domain in terms of components of a real set of eigenvectors of the rotor.