水下高速航行体超空泡减阻特性数值模拟研究

Numerical simulated research on the supercavity anti-drag characteristic of underwater high speed body

利用CFD商业软件Fluent6.2对水下高速航行体超空泡流进行了数值模拟研究,计算了带圆盘与圆锥两种头部空化器航行体的阻力特性,详细分析了空化器直径、锥角、航行体长细比对超空泡减阻特性的影响,并计算了高速水下航行体自然超空泡减阻率.结果表明,在超空泡形态下,带圆盘空化器头部的水下高速航行体,更加有利于超空泡的减阻,超空泡减阻率可达95%以上.研究结果为进一步研究水下高速航行体的结构设计和水动力布局提供了理论参考.

In this paper, supercavitating flow of underwater high-speed body was numerically simulated by commercial CFD software Fluent6.2.The anti-drag characteristic of body with disk cavitator and taper cavitator was calculate. The influence of cavitatar diameter, cone angle, slenderness ratio of body on the anti-drag of supercavity was analyzed. Anti-drag ratio of nature supercavitation of underwater high speed body was calculated. The results show that the underwater high speed body with disk cavitator is more valid.for supercavitatv anti-drag than other structure, anti-drag ratio is above 95% in supercavitation profiles. These conclusions can provide principle reference for further research on structure design and hydrodynamic characteristics of the underwater high speed body.