爆炸与冲击2017，Vol.37Issue(4)：727-733,7.DOI:10.11883/1001-1455(2017)04-0727-07
截卵形弹水平入水的速度衰减及空泡扩展特性
Characteristics of velocity attenuation and cavity expansion induced by horizontal water-entry of truncated-ogive nosed projectiles
摘要
Abstract
In this paper,the horizontal water-entry experiments of truncated-ogive projectiles at the velocity range of 100～150 m/s were conducted using a light-gas gun and a high-speed camera to record thc whole water-entry process.The characteristics of the velocity attenuation and the drag coefficients of truncated-ogive projectiles were obtained,and the trajectory stability and the characteristics of velocity attenuation for the flat-nosed,the ogive-nosed and the truncated ogive-nosed projectiles were compared and analyzed.The cavity expanding behaviors induced by the truncated ogive-nosed projectile's water entry were studied and a theoretical model of the cavity expansion was established.The relationships between the radial cavity radius,cavity wall velocity and time,penetration distance at fixed locations and fixed times were obtained,and good agreements were found between the experimental observations and the theoretical analysis.关键词
截卵形弹/入水/阻力因数/速度衰减/空泡扩展Key words
truncated-ogive projectile/water-entry/drag coefficient/velocity attenuation/cavity expansion分类
数理科学引用本文复制引用
郭子涛,张伟,郭钊,任鹏..截卵形弹水平入水的速度衰减及空泡扩展特性[J].爆炸与冲击,2017,37(4):727-733,7.基金项目
国家自然科学基金项目(11562008,11672092) （11562008,11672092）
