On the cavity pressure during the water-entry of a supercavitating vehicle

In this paper, the natural supercavitys are studied both experimentally and numerically. A series of supercavitating vehicle water-entry test are carried out at different speeds, where it is found that the minimum pressure in the cavity gradually reduced with the increase of water-entry speed. The cause for the evolution progress of natural supercavitation is difficult to get from the experiment, so a computational fluid dynamics (CFD) model is proposed, for the numerical simulation can provides some supplements to analyze the reasons. The numerical method adopted in this article is firstly validated by comparing its results with experimental data.