弹丸倾斜入水尾拍运动特性实验

鹿麟 闫雪璞 胡彦晓 王辰 高词松 张东晓

鹿麟, 闫雪璞, 胡彦晓, 王辰, 高词松, 张东晓. 弹丸倾斜入水尾拍运动特性实验[J]. 爆炸与冲击, 2023, 43(7): 073302. doi: 10.11883/bzycj-2022-0266
引用本文: 鹿麟, 闫雪璞, 胡彦晓, 王辰, 高词松, 张东晓. 弹丸倾斜入水尾拍运动特性实验[J]. 爆炸与冲击, 2023, 43(7): 073302. doi: 10.11883/bzycj-2022-0266
LU Lin, YAN Xuepu, HU Yanxiao, WANG Chen, GAO Cisong, ZHANG Dongxiao. Experiment on tail-slapping motion characteristics for oblique water-entry of a projectile[J]. Explosion And Shock Waves, 2023, 43(7): 073302. doi: 10.11883/bzycj-2022-0266
Citation: LU Lin, YAN Xuepu, HU Yanxiao, WANG Chen, GAO Cisong, ZHANG Dongxiao. Experiment on tail-slapping motion characteristics for oblique water-entry of a projectile[J]. Explosion And Shock Waves, 2023, 43(7): 073302. doi: 10.11883/bzycj-2022-0266

弹丸倾斜入水尾拍运动特性实验

doi: 10.11883/bzycj-2022-0266
基金项目: 国家自然科学基金(52201385);山西省自然科学基金(20210302123023);山西省回国留学人员科研资助项目(2020-106)
详细信息
    作者简介:

    鹿麟(1988- ),男,博士,副教授,lulin2016@nuc.edu.cn

  • 中图分类号: O383;TJ012.3

Experiment on tail-slapping motion characteristics for oblique water-entry of a projectile

  • 摘要: 基于高速摄影技术,开展多工况下弹丸倾斜入水实验,并利用自编程序,对实验图像进行像素点捕捉及数据提取与处理。通过分析弹丸倾斜入水空泡形成、发展及溃灭过程,得到尾拍过程中弹丸的空泡演化特性。此外,通过对比分析不同入水初速下空泡尺寸及弹丸速度与加速度的变化规律,总结出入水初速对弹丸空泡演化特性及入水运动特性的影响规律。结果表明:弹丸发生尾拍后,部分弹尾穿透原始空泡发生沾湿,同时自弹尾向后产生了新的尾拍空泡,尾拍空泡与原始空泡间贴合紧密;尾拍结束后,尾拍空泡在水中的位置基本不变,最终从弹丸原始空泡表面拉脱溃灭,而相同深度的原始空泡在尾拍产生射流影响下加速溃灭;随着入水初速的升高,尾拍空泡的尺寸及原始空泡的长度逐渐增大,尾拍过程中弹尾最大沾湿面积也逐渐增大;随着尾拍次数的增加,弹丸在每次尾拍过程中速度衰减幅值增大,同时弹丸损耗的能量逐渐增多,弹丸存速能力下降。
  • 图  1  实验系统示意图

    Figure  1.  Schematic diagram of experimental system

    图  2  实验现场布置图

    Figure  2.  Diagram of experimental site

    图  3  实验弹丸模型

    Figure  3.  Experimental projectile model

    图  4  弹丸倾斜入水空泡形态演化

    Figure  4.  Cavity evolutions of the oblique water-entry of the projectile

    图  5  沾湿弹尾受力示意图

    Figure  5.  Schematic diagram of forces on wetted projectile tail

    图  6  第1次尾拍空泡的演化细节

    Figure  6.  Details of the evolution of the first tail-slapping cavity

    图  7  第2次尾拍空泡的演化细节

    Figure  7.  Details of the evolution of the second tail-slapping cavity

    图  8  第1次尾拍空泡溃灭细节

    Figure  8.  Detail of the first tail-slapping cavity collapse

    图  9  第2次尾拍空泡溃灭细节

    Figure  9.  Detail of the collapse of the second tail-slapping cavity

    图  10  弹丸运动坐标系

    Figure  10.  Projectile motion coordinate system

    图  11  不同入水初速的弹丸入水情况

    Figure  11.  Projectile water-entry processes at different initial velocities

    图  12  不同入水初速下无量纲速度及无量纲加速度

    Figure  12.  Dimensionless velocities and accelerations at different initial velocities

    图  13  两次尾拍空泡在最大尺寸时刻的外轮廓线

    Figure  13.  Outer contours of two tail-slapping cavities at the time of the maximum size

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出版历程
  • 收稿日期:  2022-06-16
  • 修回日期:  2022-09-22
  • 网络出版日期:  2022-10-13
  • 刊出日期:  2023-07-05

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