摘要
利用高速射弹试验对自然超空泡的形态特性和发展规律进行了深入研究。试验采用了不同尺寸的试验弹,射弹最大速度可达70m/s,最小空化数可达0.04。获得了水下航行体的自然超空泡形态参数随空化数变化的规律,并与相关文献中使用的经验公式进行了对比,在小空化数下一致性较好。研究结果表明,高速射弹试验是研究自然超空泡形态特性的一种有效手段,能够捕捉到大量超空泡水动力学现象,证实了自然超空泡的直径和长度都随空化数的增大而减小,且呈指数规律。
A series of high-speed projectile experiments were conducted to investigate the characteristics of natural supercavitation. Different models were designed for the experiments, the velocities of which range from 0 to 70 m/s. According to the velocities of models, a minimum cavity number of 0.04 could be achieved. The dependence of the characteristic parameters of natural supercavitation on the cavity number was obtained by analyzing the experimental data. It is shown that the diameter and length of natural supercavitation decreased with cavity number by exponential law. At the conditions of small cavity number, the dependence is consistent with the reported empirical formulas. The results show that high-speed projectile experiment is one of the most effective methods for investigating the characteristics of natural supercavitation, which may be used to capture many hydrodynamic phenomena.
出处
《工程力学》
EI
CSCD
北大核心
2006年第12期175-179,187,共6页
Engineering Mechanics
关键词
流体力学
自然超空泡
高速射弹试验
空化数
水下航行体
fluid mechanics
natural supercavitation
high-speed projectile
cavity number
underwater vehicle
