Effects of micrometer-scale cavities on the shock-to-detonation transition in a heterogeneous LX-17 energetic material

doi:10.1063/5.0174851

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Effects of micrometer-scale cavities on the shock-to-detonation transition in a heterogeneous LX-17 energetic material
	Sun, Jie 3; Yang PF(杨鹏飞)2; Meng BQ(孟宝清)2; Zhou R(周睿)1; Tian, Baolin 3; Chen, Zheng 3
刊名	PHYSICS OF FLUIDS
	2023-12-01
卷号	35 期号:12 页码:12
ISSN号	1070-6631
DOI	10.1063/5.0174851
通讯作者	Meng, Baoqing(mengbaoqing92@foxmail.com)
英文摘要	Cavities and other fracture structures within energetic materials may have significant impact on their performance. The mechanism on how hot spots induced by cavity collapse affect the detonation initiation process is still not fully understood. In this work, two-dimensional simulations are conducted for heterogeneous LX-17 energetic material containing array-distributed cavities to investigate the detonation initiation process induced by the impaction of the incident shock wave (ISW), and the impacts of cavity size and volume fraction on the shock-to-detonation transition (SDT) are also evaluated. First, we fix the cavity radius to be 40 mu m and the cavity volume fraction to be 12.57%, and compare the detonation initiation processes for neat and heterogeneous LX-17 energetic materials. The results indicate that cavities within LX-17 can accelerate the detonation initiation, i.e., shortening the initiation distance and time. Then, the flow characteristics and incident shock wave evolutions during the cavity collapse process are analyzed. The results show that the interaction between the cavity and the incident shock wave results in the local hot spots and causes LX-17 reactant to auto-ignite, so as to accelerate the shock-to-detonation transition. Finally, the influence of the cavity size and volume fraction on the detonation initiation process is assessed. It is found that as the cavity volume fraction increases, the detonation initiation distance and time increase and even become larger than the results predicted of the neat case, i.e., the acceleration effect of cavities on the detonation initiation weakens and the cavities even inhibits the shock-to-detonation transition. When the cavity volume fraction is fixed, it is found cases of small-size cavity predict longer initiation distance and time than cases of large-size cavity. The analysis indicates that increasing cavity volume fraction corresponds to smaller density of LX-17 reactant, and the hot spot duration time is shorter for cases of small-size cavity than cases of large-size cavity. Therefore, the detonation initiation distance and time increase as the cavity volume fraction increases and the cavity size decreases.
分类号	一类/力学重要期刊
资助项目	National Key Project of China ; National Natural Science Foundation of China[12002063] ; National Natural Science Foundation of China[12202014] ; [GJXM92579]
WOS关键词	COLLAPSE ; INITIATION ; IGNITION
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001127031300013
资助机构	National Key Project of China ; National Natural Science Foundation of China
其他责任者	Meng, Baoqing
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93991]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Inst Appl Phys & Computat Math, LCP, Beijing 100094, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 3.Peking Univ, Coll Engn, HEDPS, CAPT,SKLTCS, Beijing 100871, Peoples R China;
推荐引用方式 GB/T 7714	Sun, Jie,Yang PF,Meng BQ,et al. Effects of micrometer-scale cavities on the shock-to-detonation transition in a heterogeneous LX-17 energetic material[J]. PHYSICS OF FLUIDS,2023,35(12):12.
APA	Sun, Jie,杨鹏飞,孟宝清,周睿,Tian, Baolin,&Chen, Zheng.(2023).Effects of micrometer-scale cavities on the shock-to-detonation transition in a heterogeneous LX-17 energetic material.PHYSICS OF FLUIDS,35(12),12.
MLA	Sun, Jie,et al."Effects of micrometer-scale cavities on the shock-to-detonation transition in a heterogeneous LX-17 energetic material".PHYSICS OF FLUIDS 35.12(2023):12.