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

doi:10.1063/5.0174851

	Effects of micrometer-scale cavities on the shock-to-detonation transition in a heterogeneous LX-17 energetic material
	Sun, Jie 1; Yang PF(杨鹏飞)2 ; Meng BQ(孟宝清)2; Zhou R(周睿)3; Tian, Baolin1 ; Chen, Zheng 1
通讯作者	Meng, Baoqing([email protected])
发表期刊	PHYSICS OF FLUIDS
	2023-12-01
卷号	35 期号:12 页码:12
ISSN	1070-6631
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.
DOI	10.1063/5.0174851
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001127031300013
关键词[WOS]	COLLAPSE ; INITIATION ; IGNITION
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
资助项目	National Key Project of China ; National Natural Science Foundation of China[12002063] ; National Natural Science Foundation of China[12202014] ; [GJXM92579]
项目资助者	National Key Project of China ; National Natural Science Foundation of China
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Meng, Baoqing
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/93992
专题	高温气体动力学国家重点实验室
作者单位	1.Peking Univ, Coll Engn, HEDPS, CAPT,SKLTCS, Beijing 100871, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 3.Inst Appl Phys & Computat Math, LCP, Beijing 100094, 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.Rp_Au:Meng, Baoqing
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.

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