EXPERIMENTAL STUDY OF THE FLOW FIELD AROUND A ROLLING SHIP MODEL

The experimental survey of the 3D velocity field of a DDG551 ship model in forced rolling motion have been carried out at the INSEAN Circulating Water Channel with the aim to obtain suitable data for CFD validation. Results are presented and discussed for the bare hull and fully appended configurations. Flow field is resolved in phase with the roll motion to point out flow structures by using laser Doppler velocimetry. The effectiveness of the bilge keels in damping the roll motion is demonstrated by the generation of strong vortical structures which are dominating in the flow field.