(Full screen view)

The CARDAAX computer code is a modified version of the CARDAAV code in which the expanding lateral displacements of the streamlines are calculated with respect to an undistorted central streamline (streamtube expansion effects). The streamline position, defined by its coordinates, depends on the local tip-speed ratio of the rotor. In this new numerical procedure, it is assumed that the upwind half-cycle of the rotor is divided into nine angular tubes corresponding to six angular tubes on the downwind half-cycle zone.