截锥体头型弹丸低速斜入水实验研究 |
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引用本文: | 罗驭川,黄振贵,高建国,陈志华,侯宇,郭则庆.截锥体头型弹丸低速斜入水实验研究[J].爆炸与冲击,2019,39(11). |
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作者姓名: | 罗驭川 黄振贵 高建国 陈志华 侯宇 郭则庆 |
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作者单位: | 南京理工大学瞬态物理国家重点实验室,江苏南京,210094 |
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基金项目: | 装备发展部预研重点实验室基金(614260403041803);中央高校基本科研业务费专项(30917012101) |
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摘 要: | 为研究截锥体头型弹丸在低速斜入水条件下,头部直径大小对入水空泡及弹道特性的影响,基于高速摄像方法,开展不同截锥体头型弹丸低速倾斜入水对比实验,得到了截锥体头弹丸头部直径大小对入水空泡、运动速度、俯仰角的影响规律。实验结果表明:截锥体头弹丸头部直径越大,尾部越早与空泡下壁面发生碰撞;头部直径大小对空泡深闭合时间几乎没有影响;弹丸空泡随头部直径增大而增大;头部直径过大或者过小均不利于入水稳定性;弹丸速度低于临界值时呈上升趋势,高于临界值时将呈现下降趋势。
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关 键 词: | 截锥体头型 空泡 弹道特性 入水稳定性 |
收稿时间: | 2018-12-13 |
Experiment research of low-speed oblique water-entry of truncated cone-shaped projectile |
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Institution: | National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China |
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Abstract: | In this work we conducted comparative experiments of different truncated cone-nosed projectiles entering water at low-speed and oblique inclination to investigate the influence of the size of the head diameter on water-entry cavity and ballistic characteristics using high-speed photography. We observed and recorded the effects of the size of the head diameter on the cavitational evolution, velocity and pitch angle of the truncated cone-nosed projectiles. The following results were achieved: the larger the truncated cone head projectile diameter, the earlier the tail collides with the low surface cavity; the size of the head diameter has little effect on the cavity deep closure moment; the cavity of projectile increases with the increase of the head diameter; an excessively large or small head diameter is not conducive to the stability of water entry; when the water entry velocity of the projectile is below the critical velocity, the velocity shows an upward trend, while when it is above the critical velocity, it will show a downward trend. |
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