用容积阻力系数评价超空泡减阻能力的研究

The Research on Evaluating Drag Reduction Ability of Supercavitation with Volume Drag Coefficient

在水下高速航行的空化器尾部的低压区会形成空泡。文中利用二维轴对称模型,对5种不同空化器下的超空化流动进行了数值模拟。提出了容积阻力系数的方法来判断不同空化器的减阻能力,利用数值方法获得了几种空化的容积阻力系数,获得了其随空化数的变化规律,并拟合成了代数公式。文中结论可供超空泡航行体的研究与设计参考。

Cavity would be formed at low pressure zone behind the cavitator of the high speed under-water vehicle. Five kinds of su- percavitating flow by different cavitator were simulated by two-dimensional axis-symmetry method. Volume drag coefficient was employed to describe the drag reduction ability of different cavitator. General rule of volume drag coefficient was obtained. An algebraic formula was fitted by the result of simulation. The paper can be a reference for investigation and design of under-water supercavitating vehicle.