This paper describes the evaluation of the wave profile of submarine at surface condition and deck flooding which occurred by the wave making pattern at the bow. Movement of ships and submarines on the free surface of calm water creates the surface wave. Because of the difference in the bow shape and freeboard height, the wave making system in ships and submarines is different. Rounded or elliptical bow shape of submarines generates a high bow wave which causes deck and bow wetness. This is because of the fact that, in submarines this situation arises a small freeboard. In submarines, Deck wetness (because of deck flooding) is a very important subject that has some remarkable consequences, such as increase in resistance and added weigh. The focus of this paper is on the added frictional resistance in the deck wetness condition. Two methods are employed in this study in order to evaluate this phenomenon; CFD method and experimental method. In the first stage of the investigation, the bow wave profile, deck wetness and added resistance are studied in several Froude numbers by CFD method. In the next stage, the bow wave profile is studied in two different bow shapes (Tango and DREA) by the experimental method. This analysis is performed for a bare hull model at two different drafts by Flow Vision (V.2.3) software based on CFD method and solving the RANS equations. Experiments are conducted for two models with appendages and different bow shapes (Tango and DREA) in the towing tank of Isfahan University of Technology (IUT).
