A study on flow field characteristics and motion characteristics of two supercavitating projectiles in asynchronous parallel water-entry

PDF(2707 KB)

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (16) : 167-176.

YAN Xuepu,LU Lin,WANG Chen,LI Qiang,HU Yanxiao

Author information +

History +

Abstract

Based on Fluent fluid simulation software, and used the finite-volume method, VOF multiphase flow model and overlapping grid technique, a numerical method for parallel entry of supercavitating projectiles into water is established to study the water entry performance of supercavitating projectiles in asynchronous parallel. The high-speed water entry experiment of single projectile is carried out by using high-speed camera and light gas gun. The reliability of the numerical method is verified by comparing the simulation results with the experimental results. On the basis of this numerical method, the water entering process of parallel supercavitating projectiles with initial longitudinal spacing of 0，0.5，1，1.5，2 and 3 times of projectile length is numerically simulated, and the flow field characteristics and motion characteristics of two projectiles with different longitudinal spacing are compared and analyzed. The results show that the coupling relationship between the cavities of the asynchronous parallel projectile is different from that of the synchronous parallel projectile; When the initial longitudinal distance is 0.5 times of the length of the projectile, the cavity of projectile 1 is squeezed violently by the cavity of projectile 2, and the right side of projectile 1 pierces the cavity and a tail beat occurs; When the initial longitudinal distance is three times the length of projectile, the cavitation interference of projectile 2 by projectile 1 is obvious, and the projectile is completely unstable in the later stage of water entering; Compared with synchronous parallel, the impact load of projectile 2 in asynchronous parallel is smaller. And as the initial longitudinal spacing increases from 0 to 3 times the projectile length, the impact load of projectile 2 shows a decreasing trend.
Key words: asynchronous parallel water-entry；cavitation evolution；motion characteristics；numerical simulation；water-entry experimental

Key words

asynchronous parallel water-entry / cavitation evolution / motion characteristics / numerical simulation / water-entry experimental

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

YAN Xuepu,LU Lin,WANG Chen,LI Qiang,HU Yanxiao. A study on flow field characteristics and motion characteristics of two supercavitating projectiles in asynchronous parallel water-entry[J]. Journal of Vibration and Shock, 2022, 41(16): 167-176

References

[1] 黄闯,罗凯,白杰,等. 液体可压缩性对超空化流动的影响[J]. 上海交通大学学报，2016，50(8)：1241-1245.
HUANG Chuang, LUO Kai, BAI Jie, et al. Influence of liquid’s compressibility on supercavitation flow[J]. Journal of Shanghai Jiao Tong University, 2016, 50(8): 1241-1245.
[2] 陈晨,马庆鹏,魏英杰,等. 空气域压力对高速射弹入水流场影响[J]. 北京航空航天大学学报，2015，41(8)：1443-1450.
CHEN Chen, MA Qingpeng, WEI Yingjie, et al. Effects of operating pressure on high-speed projectile’s water-entry flow[J]. Journal of Beijing University of Aeronautics and Astronautics，2015, 41 (8): 1443-1450.
[3] 赵成功,王聪,魏英杰,等. 质心位置对超空泡射弹尾拍运动影响分析[J]. 北京航空航天大学学报，2014，40(12)：1754-1760.
ZHAO Chenggong, WANG Cong, WEI Yingjie, et al. Analysis of the effect of mass center position on tailslap of supercavitating projectile[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1754-1760.
[4] 王云,袁绪龙,吕策. 弹体高速入水弯曲弹道实验研究[J]. 兵工学报，2014，35(12)：1998-2002.
WANG Yun, YUAN Xulong, Lü Ce. Experimental research on curved trajectory of high-speed water-entry missile[J]. Acta Armamentarii, 2014, 35(12): 1998-2002.
[5] 侯宇,黄振贵,郭则庆,等. 超空泡射弹小入水角高速斜入水试验研究[J]. 兵工学报，2020，41(2)：332-341.
HOU Yu, HUANG Zhengui, GUO Zeqing, et al. Experimental investigation on shallow-angle oblique water-entry of a high-speed supercavitating projectile[J]. Acta Armamentarii, 2020, 41(2): 332-341.
[6] LI Q，LU L,CAI T. Numerical investigations of trajectory characteristics of a high-speed water-entry projectile [J]. AIP Advance, 2020, 10(9):095107.
[7] LI Q，LU L. Numerical investigations of cavitation nose structure of a high-speed projectile impact on water-entry characteristics [J]. Journal of Marine Science and Engineering, 2020, 8(4): 265.
[8] TECHET A, TRUSCOTT T. Water entry of projectiles[J]. Annual Review of Fluid Mechanics, 2014,46: 355-378.
[9] 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.
[10] LEE M, LONGORIA R G, WILSON D E. Cavity dynamics in high-speed water entry[J]. Physics of Fluids, 1997,9(3):540-550.
[11] WEILAND C, VLACHOS P P. Time-scale for critical growth of partial and supercavitation development over impulsively translating projectiles[J]. International Journal of Multiphase Flow, 2012, 38(1):73-86.
[12] 余德磊,王聪,何超杰. 回转体并联入水过程空泡及运动特性数值模拟[J]. 哈尔滨工业大学学报,2021(12):23-32.
YU Delei, WANG Cong, HE Chaojie. Numerical simulation of cavitation and motion characteristics of revolution bodies entering water in parallel[J]. Journal of Harbin Institute of Technology,2021(12):23-32.
[13] 路丽睿,魏英杰,王聪,等. 双圆柱体低速并联入水过程空泡及运动特性试验研究[J]. 振动与冲击，2019，38(7)：42-49.
LU Lirui, WEI Yingjie, WANG Cong, et al. Tests for cavities and motion characteristics in process of two-cylinder in parallel water entry at low speed[J]. Journal of Vibration and Shock, 2019, 38(7): 42-49.
[14] 王旭,吕续舰. 双球并联入水空化及运动特性实验研究[J]. 振动与冲击，2020，39(15)：221-229.
WANG Xu，LüXujian. Tests for cavitation and motion characteristics of double-ball parallel water entry[J]. Journal of Vibration and Shock, 2020, 39(15): 221-229.
[15] 张鹤,魏英杰,王聪,等. 侧方扰动下圆柱体异步并列入水试验[J]. 船舶工程，2020，42(9)：142-148.
ZHANG He, WEI Yingjie, WANG Cong, et al. Experiment of asynchronous parallel water-entry process of cylinders under side disturbance[J]. Ship Engineering, 2020, 42(9): 142-148.
[16] 张鹤,魏英杰,王聪,等并联射弹水下运动实验研究[J]. 舰船科学技术，2021，43(3)：71-75.
ZHANG He, WEI Yingjie, WANG Cong, et al. Experimental study on underwater motion of parallel projectiles[J]. Ship Science and Technology, 2021, 43(3): 71-75.
[17] ZWART P J, GERBER A G.A two-phase flow model for predicting cavitation dynamics[C]//Fifth International Conference on Multiphase Flow. Yokohama:ICMF, 2004.