Prediction of the scale effect for the hull-propeller interaction factors

The paper is focused on the possibility of scale effect calculations using unsteady solution of the Reynolds equations (URANS method) for arbitrary hull shapes. URANS method is used for simulation of a flow around the tanker 12990 with rotating propeller in both model and full scales. The computational results have been verified against the model and full scales experimental data for the drag, thrust and moment. The scaling of the wake factor is done using 4 different semi-empirical approaches. Effects of the surface roughness of the hull and propeller on the propulsion characteristics are considered. Some advantages and disadvantages of the presented method are discussed in the paper