Simulation of Water Entry Jet and Cavitation Characteristics of Hollow Projectiles

XIANG Junbang; WANG Xiaoguang; KANG Huifeng; XUAN Jialin; YANG Liu

doi:10.11993/j.issn.2096-3920.2023-0163

Volume 32 Issue 3

Jun 2024

Turn off MathJax

Article Contents

Article Navigation > Journal of Unmanned Undersea Systems > 2024 > 32(3): 482-488

XIANG Junbang, WANG Xiaoguang, KANG Huifeng, XUAN Jialin, YANG Liu. Simulation of Water Entry Jet and Cavitation Characteristics of Hollow Projectiles[J]. Journal of Unmanned Undersea Systems, 2024, 32(3): 482-488. doi: 10.11993/j.issn.2096-3920.2023-0163

Citation:

XIANG Junbang, WANG Xiaoguang, KANG Huifeng, XUAN Jialin, YANG Liu. Simulation of Water Entry Jet and Cavitation Characteristics of Hollow Projectiles[J]. Journal of Unmanned Undersea Systems, 2024, 32(3): 482-488. doi: 10.11993/j.issn.2096-3920.2023-0163

Citation:

PDF( 1525 KB)

Simulation of Water Entry Jet and Cavitation Characteristics of Hollow Projectiles

doi: 10.11993/j.issn.2096-3920.2023-0163

1.
North China Institute of Aerospace Engineering, Hebei Provincial Key Laboratory of Cross-Media Flight Vehicles, Langfang 065000, China
2.
School of Energy and Environment Engineering, Hebei University of Technology, Tianjin 300401, China

Received Date: 2023-12-13
Accepted Date: 2024-01-31
Rev Recd Date: 2024-01-08

Available Online: 2024-03-27

Abstract

Abstract

In the water entry process of hollow projectiles, the formation of high-speed water jets is a crucial factor influencing their water entry. In order to study the influence of the through-hole aperture of hollow projectiles on jet and water entry characteristics, a vertical water entry simulation model for hollow projectiles with different apertures was established, and the intra-hole pressure characteristics and the difference in cavity development among projectiles with different apertures were compared. The results show that the aperture ratio is related to the intensity of intra-hole pressure at the moment of initial collision. The height and velocity of the jet decrease with an increase in the aperture ratio, which is related to the intra-hole pressure gradient. Additionally, the intensity of the pressure gradient diminishes as the aperture ratio increases. This study briefly describes the development of the cavitation phenomenon in hollow projectiles and analyzes the influence of the aperture ratio on the cavitation phenomenon. The results indicate that as the aperture ratio increases, the amount of vapor produced by the projectile decreases, leading to an earlier closing of the cavity.
- hollow projectile,
- water entry,
- pressure gradient,
- jet,
- cavitation

FullText(HTML)

References(11)

References

[1]	Wang Y. Studying progress on hollow projectile technique in the western countries[J]. Projectile & Rocket Technology, 1996, 9(3): 1-10.
[2]	Fan H W, Huang Z G, Wang H, et al. Numerical study of high-speed vertical water entry of hollow projectiles with different aperture sizes and velocities[J]. Journal of Applied Fluid Mechanics, 2023, 16(11): 19-34.
[3]	Wang Z, Feng P, Liu G, et al. Load and motion behaviors of ogive-nosed projectile during high-speed water entry with angle of attack[J]. Ocean Engineering, 2022, 266: 112937. doi: 10.1016/j.oceaneng.2022.112937
[4]	Yu Y, Shi Y, Pan G, et al. Effect of asymmetric nose shape on the cavity and mechanics of projectile during high-speed water entry[J]. Ocean Engineering, 2022(3): 1-12.
[5]	孙钊, 曹伟, 王聪, 等. 表面润湿性对球体入水空泡形态的影响研究[J]. 兵工学报, 2016, 37(4): 670-676. doi: 10.3969/j.issn.1000-1093.2016.04.014 Sun Zhao, Cao Wei, Wang Cong, et al. Effect of surface wettability on cavitation of sphere during its water entry[J]. Acta Armamentarii, 2016, 37(4): 670-676. doi: 10.3969/j.issn.1000-1093.2016.04.014
[6]	卢佳兴, 魏英杰, 王聪, 等. 圆柱体并联入水过程空泡演化特性实验研究[J]. 力学学报, 2019, 51(2): 450-461. doi: 10.6052/0459-1879-18-288 Lu Jiaxing, Wei Yingjie, Wang Cong, et al. Experimental study on cavity evolution characteristics in the water-entry process of parallel cylinders[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(2): 450-461. doi: 10.6052/0459-1879-18-288
[7]	Shi Y, Xiao P, Zhao H, et al. Experimental research on the influences of head shape and surface properties on the water entry cavity[J]. Journal of Marine Science and Engineering, 2022, 10(10): 1411. doi: 10.3390/jmse10101411
[8]	路中磊, 魏英杰, 王聪, 等. 开放空腔壳体入水扰动流场结构及空泡失稳特征[J]. 物理学报, 2017, 66(6): 167-181. doi: 10.7498/aps.66.064702 Lu Zhonglei, Wei Yingjie, Wang Cong, et al. Experimental and numerical investigation on the flow structure and instability of water-entry cavity by a semiclosed cylinder[J]. Acta Physica Sinica, 2017, 66(6): 167-181. doi: 10.7498/aps.66.064702
[9]	侯宇, 黄振贵, 陈志华, 等. 空心圆柱低速垂直入水试验研究[J]. 工程力学, 2019, 36(9): 237-246. doi: 10.6052/j.issn.1000-4750.2018.08.0440 Hou Yu, Huang Zhengui, Chen Zhihua, et al. An experimental investigation on the low speed vertical water-entry of hollow cylinders[J]. Engineering Mechanics, 2019, 36(9): 237-246. doi: 10.6052/j.issn.1000-4750.2018.08.0440
[10]	Sun T, Shen J, Jiang Q, et al. Dynamics analysis of high-speed water entry of axisymmetric body using fluid-structure-acoustic coupling method[J]. Journal of Fluids and Structures, 2022, 111: 103551. doi: 10.1016/j.jfluidstructs.2022.103551
[11]	Erfanian M R, Anbarsooz M. Numerical investigation of body and hole effects on the cavitating flow behind a disk cavitator at extremely low cavitation numbers[J]. Applied Mathematical Modelling, 2018, 62: 163-180.