Experimental study on oblique water-entry of projectile constrained by ice hole

ZHANG Dongxiao; LU Lin; YAN Xuepu; GAO Cisong; HU Yanxiao; CHEN Kaimin

doi:10.11883/bzycj-2023-0143

Volume 43 Issue 10

Oct. 2023

Turn off MathJax

Article Contents

Article Navigation > Explosion And Shock Waves > 2023 > 43(10): 103304

ZHANG Dongxiao, LU Lin, YAN Xuepu, GAO Cisong, HU Yanxiao, CHEN Kaimin. Experimental study on oblique water-entry of projectile constrained by ice hole[J]. Explosion And Shock Waves, 2023, 43(10): 103304. doi: 10.11883/bzycj-2023-0143

Citation:

ZHANG Dongxiao, LU Lin, YAN Xuepu, GAO Cisong, HU Yanxiao, CHEN Kaimin. Experimental study on oblique water-entry of projectile constrained by ice hole[J]. Explosion And Shock Waves, 2023, 43(10): 103304. doi: 10.11883/bzycj-2023-0143

Citation:

PDF( 11281 KB)

Experimental study on oblique water-entry of projectile constrained by ice hole

doi: 10.11883/bzycj-2023-0143

1.
School of Mechatronics Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Chongqing Changan Wangjiang Industry (Group) Co., LTD, Chongqing 401120, China

Received Date: 2023-04-19
Rev Recd Date: 2023-08-07
Publish Date: 2023-10-27

Abstract

Abstract

Based on high-speed photography technology, an experiment study on water-entry of oblique projectile constrained by ice hole was conducted. Digital image processing technology was employed to extract the experimental data. The water-entry process of oblique projectile was analyzed under both ice-free and ice hole constraint environment, and the water-entry process is divided into three stages: cavity expansion stage, cavity closure stage and cavity collapse stage. Additionally, a series water-entry experiments were also conducted with different initial velocities of projectiles under the same ice hole constraint, allowing for the establishment of a relationship between initial velocity and ice hole constraint. Results show that during the cavity expansion stage, the free surface under the ice-hole constraint does not form a bulge, and the splashing on the water-away side of the projectile is suppressed by the ice hole and is more dispersed. The ice-hole constraint leads to the obstruction of cavity expansion and the appearance of bending on the left side of the cavity near the free surface, the maximum diameter of cavity decreases. In the cavity closure stage, the closure time of the cavity is advanced under the constraint of the ice hole. The reflected flow impacts the right side of cavity wall, which causes the pinch-off and local collapse of the cavity. During the cavity collapse stage, under the constraint of ice hole, the wake of cavity collapse consists of local impact collapse, pinch-off cavity collapse and normal cavity collapse, and the wake vortex generated by the collapse is small. As the initial velocity increases, the length and maximum diameter of the cavity significantly increase, and the width of local impact collapse also increases. Furthermore, the ice hole constraint makes the projectile velocity decay faster during the cavity expansion stage, advances the closure time of the cavity, and delays the collapse time of the cavity.
- oblique water-entry,
- water-entry experiment,
- ice hole constrained,
- cavity evolution,
- motion characteristics

FullText(HTML)

References(17)

References

[1]	VON KARMAN T. The impact on seaplane floats during landing: NACA-TN-321 [R]. National Advisory Committee for Aeronatics, 1929: 309-313.
[2]	FOROUZANI H, SARANJAM B, KAMALI R. A study on the motion of high speed supercavitating projectiles [J]. Journal of Applied Fluid Mechanics, 2018, 11(6): 1727–1738. DOI: 10.29252/jafm.11.06.28807.
[3]	ERFANIAN M R, ANBARSOOZ M, RAHIMI N, et al. Numerical and experimental investigation of a three dimensional spherical-nose projectile water entry problem [J]. Ocean Engineering, 2015, 104: 397–404. DOI: 10.1016/j.oceaneng.2015.05.024.
[4]	AKBARI M A, MOHAMMADI J, FEREIDOONI J. Stability of oblique water entry of cylindrical projectiles [J]. Journal of Applied Fluid Mechanics, 2021, 14(1): 301–314. DOI: 10.47176/jafm.14.01.31682.
[5]	AKBARI M A, MOHAMMADI J, FEREIDOONI J. A dynamic study of the high-speed oblique water entry of a stepped cylindrical-cone projectile [J]. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2021, 43(1): 2. DOI: 10.1007/s40430-020-02727-2.
[6]	SHI H H, ITOH M, TAKAMI T. Optical observation of the supercavitation induced by high-speed water entry [J]. Journal of Fluids Engineering, 2000, 122(4): 806–810. DOI: 10.1115/1.1310575.
[7]	高英杰, 孙铁志, 张桂勇, 等. 回转体高速倾斜入水的流场特性及结构响应 [J]. 爆炸与冲击, 2020, 40(12): 123301. DOI: 10.11883/bzycj-2020-0014. GAO Y J, SUN T Z, ZHANG G Y, et al. Flow characteristics and structure response of high-speed oblique water-entry for a revolution body [J]. Explosion and Shock Waves, 2020, 40(12): 123301. DOI: 10.11883/bzycj-2020-0014.
[8]	LU L, WANG C, LI Q, et al. Numerical investigation of water-entry characteristics of high-speed parallel projectiles [J]. International Journal of Naval Architecture and Ocean Engineering, 2021, 13(5): 450–465. DOI: 10.1016/j.ijnaoe.2021.05.003.
[9]	LU L, GAO C S, QI X B, et al. Numerical study on the water-entry characteristics of asynchronous parallel projectiles at an oblique impact angle [J]. Ocean Engineering, 2023, 271: 113697. DOI: 10.1016/j.oceaneng.2023.113697.
[10]	BERGSMA J M, BOUHUYS C W, SCHAAP T, et al. On the measurement of submersion ice resistance of ships, using artificial ice [C]// Proceedings of the Twenty-fourth International Ocean and Polar Engineering Conference. Busan: ISOPE, 2014.
[11]	ZONG Z, YANG B Y, SUN Z, et al. Experimental study of ship resistance in artificial ice floes [J]. Cold Regions Science and Technology, 2020, 176: 103102. DOI: 10.1016/j.coldregions.2020.103102.
[12]	张军, 蔡晓伟, 宣建明, 等. 弹体穿越冰水混合物流动过程的数值模拟 [J]. 弹道学报, 2020, 32(3): 35–40. DOI: 10.12115/j.issn.1004-499X(2020)03-008. ZHANG J, CAI X W, XUAN J M, et al. Numerical simulation of flow filed of projectile passing through ice water mixture [J]. Journal of Ballistics, 2020, 32(3): 35–40. DOI: 10.12115/j.issn.1004-499X(2020)03-008.
[13]	YOU C, SUN T Z, ZHANG G Y, et al. Numerical study on effect of brash ice on water exit dynamics of ventilated cavitation cylinder [J]. Ocean Engineering, 2022, 245: 110443. DOI: 10.1016/j.oceaneng.2021.110443.
[14]	张健宇. 航行体冰孔约束出水空泡演化及载荷特性研究 [D]. 大连: 大连理工大学, 2021. ZHANG J Y. Study on cavity evolution and load characteristics of water exit of underwater vehicle constrained by ice environment [D]. Dalian: Dalian University of Technology, 2021.
[15]	蔡晓伟, 宣建明, 王宝寿, 等. 细长体穿越冰-水混合物的出水流场数值模拟 [J]. 兵工学报, 2020, 41(S1): 79–90. DOI: 10.3969/j.issn.1000-1093.2020.S1.012. CAI X W, XUAN J M, WANG B S, et al. Numerical simulation of thin body passing through the ice-water mixture flow field [J]. Acta Armamentarii, 2020, 41(S1): 79–90. DOI: 10.3969/j.issn.1000-1093.2020.S1.012.
[16]	WANG H, LUO Y C, CHEN Z H, et al. Influences of ice-water mixture on the vertical water-entry of a cylinder at a low velocity [J]. Ocean Engineering, 2022, 256: 111464. DOI: 10.1016/j.oceaneng.2022.111464.
[17]	LOGVINOVICH G V. Hydrodynamics of free-boundary flows [R]. Jersualem: IPST Press, 1972.