Effect of cavitation shape and hydrodynamic drag property of submarine launching missile of water depth

In this paper, the underwater motion procession of a submarine vertically launched missile from the tube in deep water was simulated by multiple flow cavitations model and dynamic mesh technique. The pressure drag coefficient cures between the numerical results and literature data was compared. The numerical results are perfectly consistent with the literature data, thus the accuracy of the numerical method is proved. The shoulders cavitations shape of the different degree of water depth were given. The relationship between the cure law of pressure drag coefficient, friction drag coefficient and total drag coefficient and the times was obtained. Finally the effect of between cavitation shape, pressure drag, friction drag and total drag and the different degree of water depth was achieved.