Research on the Procedural Burning Characteristics of Cased Telescoped Ammunition Based on Digital Image Correlation Principle

doi:10.12382/bgxb.2023.1174

Abstract

Abstract:

The two-stage ignition and firing process of cased telescoped ammunition is experimentally researched to analyze the burning characteristics of charge and the movement characteristics of loadng and engraving. A high-speed camera system is used to capture the motion image sequences of every projectile group, and a test system for the procedural burning characteristics is devised and assembled. Based on the principle of digital image correlation, the image sequences are qualitatively and quantitatively analyzed, and the grooved morphology of the recovered band is analyzed and measured, so as to obtain the movement characteristics of projectile for one-stage ignition, the procedural burning characteristics for two-stage ignition, and the grooved morphology of the band. The findings demonstrate that the mass of fast-burning powder directly affects the loading performance of the first-stage ignition projectile. The loading time of projectile is significantly shortened and the loading speed is greatly increased when the mass of fast-burning ignition powder is increased. The premature fragmentation of combustible guide tube leads to a significant increase in the loading speed, resulting in a very poor band grooved morphology, which does not reliably seal the rear powder gas and steer the projectile motion, thus affecting the interior ballistic trajectory performance and the in-bore motion attitude of projectile. The reasonable matching design of fast-burning ignition powder and combustible guide tube can keep the break-up timing of combustible guide tube in a controllable range, so as to realize the ideal two-stage ignition and procedural burning design objectives.

Key words: cased telescoped ammunition, digital image correlation principle, two-stage ignition, procedural burning, combustible guide tube, loading speed, rotating band groove

CLC Number:

SHI Junfei, QIAN Linfang, CHEN Guangsong, YIN Qiang, LIU Daokun, LI Zhonggang. Research on the Procedural Burning Characteristics of Cased Telescoped Ammunition Based on Digital Image Correlation Principle[J]. Acta Armamentarii, 2024, 45(4): 1047-1059.

Figures/Tables 14

Fig.1 Composition of short-barrelled ballistic launcher

Table 1 Charge parameters of test projectile

弹药编号	点火药质量/g	可燃导向筒质量/g	主装药质量/g
1	1.5	标准	不装
2	1.8	标准	不装
3	2.0	标准	不装
4	1.5	标准	标准
5	1.8	标准	标准
6	2.0	标准	标准

Fig.2 Procedural burning characteristics test system for cased telescoped ammunition

Fig.3 Preparation process of speckles on the projectile surface

Fig.4 Digital image correlation principle

Fig.5 Sequence diagram of projectile loading and engraving process

Fig.6 Correlation analysis of projectile motion images

Fig.7 Motion characteristics of the loading and engraving process of projectile No.1-3

Table 2 Projectile loading time and soeed

弹药编号	上膛速度/(m·s^-1)	上膛时刻/ms	运动状态
1	40.85	5.74	留膛
2	51.11	4.23	飞出炮口
3	57.25	3.57	飞出炮口

Fig.8 Band's grooved morphologies for projectiles No.1-3

Fig.9 Sealing of No.3 projectile band against the powder gas

Fig.10 Band's grooved morphologies for projectiles No.4-6

Fig.11 Comparison of the image sequence and real motion position of No.6 projectile inside the chamber

Table 3 Variation of loading speed of projectile

弹丸编号	上膛速度/(m·s^-1)	速度增量/(m·s^-1)
4	>81.2	>40.35
5	>96.7	>45.59
6	>114.3	>57.05

References 29

[1]	师军飞, 钱林方, 陈红彬, 等. 埋头弹高速冲击挤进入膛特性研究[J]. 兵工学报, 2023, 44(3):656-669.
	SHI J F, QIAN L F, CHEN H B, et al. High-speed impact engraving characteristics of cased telescoped ammunition[J]. Acta Armamentarii, 2023, 44(3):656-669. (in Chinese)
[2]	高朝鲜. 大口径埋头弹火炮内弹道设计和数值模拟[D]. 南京: 南京理工大学, 2009.
	GAO C X. Interior ballistic design and numerical simulation of CTA of large caliber gun[D]. Nanjing: Nanjing University of Science and Technology, 2009. (in Chinese)
[3]	LU X, ZHOU Y H, YU Y G. Experimental study and numerical simulation of propellant ignition and combustion for cased telescoped ammunition in chamber[J]. Journal of Applied Mechanics, 2010, 77(5):051402.
[4]	CORRIVEAU D, FLORIN PETRE C. Influence of chamber misalignment on cased telescoped (CT) ammunition accuracy[J]. Defence Technology, 2016, 12(2):117-123. doi: 10.1016/j.dt.2015.11.008
[5]	唐群英. 埋头弹装药结构对点传火和内弹道性能的影响[D]. 南京: 南京理工大学, 2019.
	TANG Q Y. Effect of CTA's charge structure on ignition and internal ballistic performance[D]. Nanjing: Nanjing University of Science and Technology, 2019. (in Chinese)
[6]	CAO Y J, YUE W L, LI X S, et al. Experimental study on initial ballistic characteristics of cased telescoped ammunition[J]. Journal of Physics Conference Series, 2020, 1507:102036.
[7]	杨伟鸿, 陈立, 刘毅, 等. 埋头弹中超高速弹丸的多区间电磁检测方法[J]. 火炮发射与控制学报, 2021, 42(2):93-99.
	YANG W H, CHEN L, LIU Y, et al. Multi-interval electromagnetic detection method for hypervelocity projectile in CTA[J]. Journal of Gun Launch & Control, 2021, 42(2):93-99. (in Chinese)
[8]	刘东尧, 孙鹏, 张欣尉, 等. 两种中口径弹药弹带动态挤进阻力特性的实验研究[J]. 弹道学报, 2020, 32(3):5-8. doi: 10.12115/j.issn.1004-499X(2020)03-002
	LIU D Y, SUN P, ZHANG X W, et al. Experimental study on engraving resistance properties of band of two medium caliber projectile[J]. Journal of Ballistics, 2020, 32(3):5-8. (in Chinese)
[9]	常人九, 薛晓春, 余永刚. 某埋头式弹丸动态冲击挤进特性的研究[J]. 北京理工大学学报, 2022, 42(12):1236-1245.
	CHANG R J, XUE X C, YU Y G. Study on dynamic impact engraving characteristic of cased telescoped ammunition[J]. Transactions of Beijing Institute of Technology, 2022, 42(12):1236-1245. (in Chinese)
[10]	XIN T, YANG G L, XU F J, et al. Modeling, simulation and uncertain optimization of the gun engraving system[J]. Mathematics, 2021, 9(4):398-398.
[11]	杨明, 余永刚. 尼龙弹带动态挤进特性试验研究与数值分析[J]. 含能材料, 2023, 31(4):356-364.
	YANG M, YU Y G. Experimental study and numerical analysis of dynamic engraving characteristics of nylon belt[J]. Chinese Journal of Energetic Materials, 2023, 31(4):356-364. (in Chinese)
[12]	许辉, 黄陈磊, 王希阔, 等. 枪弹动态挤进阻力理论与实验[J]. 兵工学报, 2022, 43(9):2263-2273.
	XU H, HUANG C L, WANG X K, et al. Theoretical and experimental research of the projectile dynamic engraving resistance[J]. Acta Armamentarii, 2022, 43(9):2263-2273. (in Chinese)
[13]	TOIVOLA J, MOILANEN S, TERVOKOSKI J, et al. Influence of rotating band construction on gun tube loading - part II:measurement and analysis[J]. Journal of Pressure Vessel Technology, 2012, 134(4):041007.
[14]	YAMAGUCHI I. Simplified laser-speckle strain gauge[J]. Optical Engineering, 1982, 21(3):436-440.
[15]	PETERS W H, RANSON W F. Digital imaging techniques in experimental stress analysis[J]. Optical Engineering, 1982, 21(3):427-431.
[16]	SUTTON A M, HILD F. Recent advances and perspectives in digital image correlation[J]. Experimental Mechanics, 2015, 55(1):1-8.
[17]	杜亮亮, 钱伟新, 刘寿先, 等. 冲击波与爆轰实验瞬态光电测试技术研究进展[J]. 兵工学报, 2023, 44(12):3622-3640. doi: 10.12382/bgxb.2023.0361
	DU L L, QIAN W X, LIU S X, et al. Research progress of transient photoelectric measurement technology for shock wave and detonation physics experiments[J]. Acta Armamentarii, 2023, 44(12):3622-3640. (in Chinese) doi: 10.12382/bgxb.2023.0361
[18]	高越. 三维数字图像相关法的关键技术及应用研究[D]. 合肥: 中国科学技术大学, 2014.
	GAO Y. Research on key technologies and applications of three-dimensional digital image correlation[D]. Hefei: University of Science and Technology of China, 2014. (in Chinese)
[19]	邹宇明. 数字图像相关(DIC)方法在钢铁材料力学性能测试中的应用研究[D]. 北京: 钢铁研究总院, 2017.
	ZOU Y M. Research of the application of digital image correlation method in mechanical properties measurement of steel materials[D]. Beijing: Central Iron & Steel Research Institute, 2017. (in Chinese)
[20]	WANG J Y, LIU Z Y, WANG H D. Full-field dynamic response of low-velocity impact on an elastic plate using 3D digital image correlation[J/OL]. Journal of Vibration and Control, 2023(2023-10-23). https://journals.sagepub.com/doi/10.1177/10775463231209539
[21]	ANDRIJA Z, ANA V, ZVONIMIR T, et al. Boundary condition effect on the evaluation of stress triaxiality fields[J]. International Journal of Mechanical Sciences, 2023, 246:108127.
[22]	温垚珂, 郑浩, 张俊斌, 等. 基于三维数字图像相关技术的防弹衣性能测试与评估[J]. 兵工学报, 2021, 42(6):1121-1127. doi: 10.3969/j.issn.1000-1093.2021.06.001
	WEN Y K, ZHENG H, ZHANG J W, et al. Test and evaluation of body armor performance based on 3D digital image correlation technology[J]. Acta Armamentarii, 2021, 42(6):1121-1127. (in Chinese) doi: 10.3969/j.issn.1000-1093.2021.06.001
[23]	邹正平, 张猛, 郎利辉. 基于三维数字图像相关法的管材胀形试验[J]. 航空学报, 2022, 43(12):539-550.
	ZOU Z P, ZHANG M, LANG L H. Tube bulging test based on 3D digital image correlation method[J]. Acta Aeronautica et Astronautica Sinica, 2022, 43(12):539-550. (in Chinese)
[24]	马天兵, 高飞彪, 陈南南. 基于双目视觉的柔性悬臂梁振动测量研究[J]. 传感器与微系统, 2020, 39(8):23-25, 29.
	MA T B, GAO F B, CHEN N N. Vibration measurement research of flexible cantilever beam based on binocular vision[J]. Transducer and Microsystem Technologies, 2020, 39(8):23-25,29. (in Chinese)
[25]	LIANG Z H, ZHANG Y X, YUE L. Experimental investigation: vibration measurement of a rotating blade with digital image correlation and blade tip-timing[J]. Micromachines, 2022, 13(12):2156.
[26]	罗腾杰. 基于三目视觉的弹丸姿态测量系统研究[D]. 重庆: 重庆大学, 2022.
	LUO T J. Research on projectile attitude measurement system based on trinocular vision[D]. Chongqing: Chongqing University, 2022. (in Chinese)
[27]	段偲丽. 基于ZYNQ双目视觉弹体姿态测量方法研究[D]. 南京: 南京理工大学, 2019.
	DUAN C L. Research on projectile attitude measurement method based on ZYNQ and binocular vision[D]. Nanjing: Nanjing University of Science and Technology, 2019. (in Chinese)
[28]	孙强飞. 基于高速成像技术的弹丸运动位姿参数测量方法研究[D]. 南京: 南京理工大学, 2018.
	SUN Q F. Research on the measurement method of projectile motion posture parameters based on high-speed imaging technology[D]. Nanjing: Nanjing University of Science and Technology, 2018. (in Chinese)
[29]	周彦煌, 王升晨. 实用两相流内弹道学[M]. 北京: 兵器工业出版社, 1990.
	ZHOU Y H, WANG S C. Practical two-phase flow interior ballistics[M]. Beijing: Publishing House of Ordnance Industry, 1990. (in Chinese)