球体垂直入水空泡实验研究

马庆鹏; 何春涛; 王聪; 魏英杰; 路中磊; 孙健

doi:10.11883/1001-1455(2014)02-0174-07

球体垂直入水空泡实验研究

doi: 10.11883/1001-1455(2014)02-0174-07

1.
哈尔滨工业大学航天学院，黑龙江哈尔滨150001
2.
北京机械设备研究所，北京100854

基金项目: 中央高校基本科研业务费专项项目（HIT.NSRIF.201159）

详细信息

作者简介:
马庆鹏(1988—), 男, 博士研究生

中图分类号: O351.2
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出版历程
- 收稿日期: 2012-09-12
- 修回日期: 2012-12-24
- 刊出日期: 2014-03-25

Experimental investigation on vertical water-entry cavity of sphere

1.
School of Astronautics, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
2.
Beijing Mechanical Equipment Institute, Beijing 100854, China

More Information

Corresponding author: Ma Qing-peng, qingpengma@gmail.com

摘要

摘要: 针对球体垂直入水问题开展了实验研究，分析了入水空泡的形成、发展、闭合及溃灭过程。通过开展不同初始入水速度及表面沾湿状态的实验研究，得到了入水速度及表面沾湿状态对球体入水空泡流场的影响，同时分析了球体在垂直入水过程中的位移、速度、加速度以及阻力因数。结果表明，球体在水下的运动参数具有较强的非线性特性，速度较高、入水空泡深闭合的条件下，球体的运动参数及阻力因数曲线具有明显的波动。
- 流体力学 /
- 入水空泡 /
- 入水 /
- 球体 /
- 运动参数
Abstract: Experimental investigations and analysis were carried out on the vertical water-entry of the spheres.The development process of the cavities induced by the vertical water-entry of the spheres was discussed including the formation, open, closure and collapse of the cavities.The influences of the water-entry velocities and surface conditions of the spheres on the cavities were experimentally obtained.And the displacements, velocities, accelerations and drag coefficients of the spheres during the water entry were analyzed.The investigated results show that the motion parameters of the spheres present highly nonlinear characteristics.And there are obvious fluctuations of the motion parameters and the drag coefficients during the closed-cavity phase if the water-entry velocities are high.
- fluid mechanics /
- water-entry cavity /
- vertical water-entry /
- sphere /
- motion parameter

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图 1 入水实验系统示意图

Figure 1. Schematic of the water-entry experiment

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图 2 球体垂直入水空泡的发展过程

Figure 2. Development of vertical water-entry cavity of sphere

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图 3 空泡敞开阶段

Figure 3. The open phase of the cavity

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图 4 空泡溃灭高速射流

Figure 4. High-speed jet flow during the collapse phase of the cavity

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图 5 不同入水速度条件下球体垂直入水空泡的发展过程

Figure 5. Development of vertical water-entry cavities of spheres with different entry velocities

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图 6 入水速度不同的球体垂直入水的运动参数和阻力因数

Figure 6. Motion parameters for spheres in vertical water entry with different entry velocities as well as drag coefficients

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图 7 表面沾湿状态不同的球体入水空泡的演化

Figure 7. Development of vertical water-entry cavities of spheres with different wetting surfaces

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图 8 表面沾湿状态不同的球体入水的运动参数和阻力因数

Figure 8. Motion parameters for spheres in vertical water entry with different wetting surfaces as well as drag coefficients

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参考文献(18)

[1]	Worthington A M, Cole R S. Impact with a liquid surface studied by the aid of instantaneous photography: Paper Ⅱ[J]. Philosophical Transactions of the Royal Society: Series A, 1900, 194: 175-200.
[2]	Gilbarg D, Anderson R A. Influence of atmospheric pressure on the phenomena accompanying the entry of spheres into water[J]. Journal of Applied Physics, 1948, 9(2): 127-139.
[3]	Richardson E G. The impact of a solid on a liquid surface[J]. Proceedings of the Physical Society of London, 1948, 61(4): 352-366. doi: 10.1088/0959-5309/61/4/308
[4]	May A, Woodhull J C. Drag coefficients of steel spheres entering water vertically[J]. Journal of Applied Physics, 1948, 19(12): 1109-1121. doi: 10.1063/1.1715027
[5]	May A, Woodhull J C. The virtual mass of a sphere entering water vertically[J]. Journal of Applied Physics, 1950, 21(12): 1285-1289. doi: 10.1063/1.1699592
[6]	May A. Effect of surface condition of a sphere on its water-entry cavity[J]. Journal of Applied Physics, 1951, 22(10): 1219-1222. doi: 10.1063/1.1699831
[7]	May A. Water entry and the cavity-running behavior of missiles[R]. ADA020429, 1975.
[8]	May A. Vertical entry of missiles into water[J]. Journal of Applied Physics, 1952, 23(12): 1362-1372. doi: 10.1063/1.1702076
[9]	Miloh T. Wave slam on a sphere penetrating a free surface[J]. Journal of Engineering Mathematics, 1981, 15(3): 221-240. doi: 10.1007/BF00042782
[10]	Miloh T. On the oblique water-entry problem of a rigid sphere[J]. Journal of Engineering Mathematics, 1991, 25(1): 77-92. doi: 10.1007/BF00036603
[11]	Miloh T. On the initial-stage slamming of a rigid sphere in a vertical water entry[J]. Applied Ocean Research, 1991, 13(1): 43-48. doi: 10.1016/S0141-1187(05)80039-2
[12]	Truscott T T, Techet A H. Water entry of spinning spheres[J]. Journal of Fluid Mechanics, 2009, 625: 135-165. doi: 10.1017/S0022112008005533
[13]	Truscott T T, Techet A H. A spin on cavity formation during water entry of hydrophobic and hydrophilic spheres[J]. Physics of Fluids, 2009, 21(12): 1703.
[14]	顾建农, 张志宏, 范武杰.旋转弹丸入水侵彻规律[J].爆炸与冲击, 2005, 25(4): 341-349. doi: 10.3321/j.issn:1001-1455.2005.04.010 Gu Jian-nong, Zhang Zhi-hong, Fan Wu-jie. Experimental study on the penetration law of a rotating pellet entering water[J]. Explosion and Shock Waves, 2005, 25(4): 341-349. doi: 10.3321/j.issn:1001-1455.2005.04.010
[15]	李晓杰, 姜力, 闫鸿浩, 等.低侵彻手枪弹入水侵彻性能数值模拟研究[J].爆炸与冲击, 2007, 27(4): 319-324. doi: 10.3321/j.issn:1001-1455.2007.04.005 Li Xiao-jie, Jiang Li, Yan Hong-hao, et al. Numerical simulation on low inbreaking handgun projectile drilling through the water[J]. Explosion and Shock Waves, 2007, 27(4): 319-324. doi: 10.3321/j.issn:1001-1455.2007.04.005
[16]	张伟, 郭子涛, 肖新科, 等.弹体高速入水特性实验研究[J].爆炸与冲击, 2011, 31(6): 579-584. http://www.bzycj.cn/article/id/8740 Zhang Wei, Guo Zi-tao, Xiao Xin-ke, et al. Experimental investigations on behaviors of projectile high-speed water entry[J]. Explosion and Shock Waves, 2011, 31(6): 579-584. http://www.bzycj.cn/article/id/8740
[17]	何春涛, 王聪, 何乾坤, 等.圆柱体低速入水空泡试验研究[J].物理学报, 2012, 61(13): 4701. He Chun-tao, Wang Cong, He Qian-kun, et al. Low speed water-entry of cylindrical projectile[J]. Acta Physica Sinica, 2012, 61(13): 4701.
[18]	Truscott T T. Cavity dynamics of water entry for spheres and ballistic projectiles[D]. Massachusetts: Massachusetts Institute of Technology, 2009.