Study on Hydrodynamic Outline of an Unmanned Underwater Vehicle

Unmanned Underwater Vehicle (UUV) is being widely developed and used in many areas. In order to meet the low resistance and low noise requirements of a kind of UUV for long voyage, the outline curve and parameters of different sections of the UUV are figured out by using method of superposition of point-source and uniform-flow, superposition of constant-strength-line-congruence and uniform-flow, and empirical formula, and thus total hydrodynamic outline of the UUV is obtained. In addition, pressure distribution of the head of the UUV is analyzed, and the maximum motion velocity that cannot induce cavitation is obtained. These results provide a strong basis for the analysis and design of the power propulsion system of the UUV. The water tunnel and sea trial demonstrate that the figuration of hydrodynamic outline can meet the need of low resistance and low noise requirements of the UUV.