Study on cone angle of shockwave front in liquid composite protective structure

You-er Cai; Yaping Tan; Xudong Zu; Zhengxiang Huang; Xiaojun Shen; Xin Jia; Qiangqiang Xiao

Study on cone angle of shockwave front in liquid composite protective structure

Authors

You-er Cai School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China https://orcid.org/0000-0002-2551-4353
Yaping Tan School of Information Technology, Jiangsu Open University, 399 Jiangdong North Road, Nanjing 210036, China https://orcid.org/0000-0003-1101-2878
Xudong Zu School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China https://orcid.org/0000-0002-4648-1669
Zhengxiang Huang a School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China https://orcid.org/0000-0002-4608-9405
Xiaojun Shen School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China https://orcid.org/0000-0002-6820-3969
Xin Jia School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China https://orcid.org/0000-0002-5051-5390
Qiangqiang Xiao School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China https://orcid.org/0009-0005-4392-7062

Abstract

Liquid composite armor has demonstrated excellent performance in protecting against shaped charge jets. Currently, most existing theoretical calculation models for the velocity range of the disturbed jet approximate the cone angle of the shockwave front as the Mach angle. However, indiscriminately equating the cone angle of the shockwave front with the Mach angle can lead to significant errors in the calculated velocity range of the disturbed jet. To address this issue, this study focuses on investigating the variation of the cone angle of the shockwave front within the liquid composite protective structure. Firstly, a dimensional analysis was conducted to determine the functional relationship between the cone angle of the shockwave front and relevant parameters. Then, the process of jet penetrating liquid composite protective structure was simulated by Autodyn. The results demonstrated that the normalized cone angle solely depends on the normalized diameter within the critical angle. By fitting the simulation data, the formula for calculating the cone angle of the shockwave front was derived.

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Published

2024-02-20

Issue

Vol. 21 No. 3 (2024)

Section

Articles

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