CARDAAS-1D & -3D

(Full screen view)


The CARDAAS code was developed in order to predict the aerodynamic loads on the Darrieus rotor in turbulent wind. This code is based on the Double-Multiple Streamtube (DMS) model and incorporates a stochastic wind model. The method used to simulate turbulent velocity fluctuations is based on the power spectral density. The problem consists in generating a region of turbulent flow with a relevant spectrum and spatial correlation. The first CARDAAS code developed was based on a one-dimensional turbulent wind model (CARDAAS-1D) and ignored the structure of the turbulence in the cross flow plane. An extension to three dimensions was made an integrated in the CARDAAS-3D code. The CARDAAS-1D and 3D code have the capability to predict the ensemble averaged values, the standard deviation, the instantaneous values, as well as the mean values with constant ambient wind.