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Influence and mechanism analysis of spatial heterogeneity on the propagation characteristics of near-limit detonation

文献类型：期刊论文

作者He, Jiahui2,3; Li, Hongbin5; Li, Jianling2; Tian, Baolin1; Meng BQ(孟宝清)4
刊名PHYSICS OF FLUIDS
出版日期2025-07-01
卷号37期号:7页码:19
ISSN号1070-6631
DOI10.1063/5.0281286
通讯作者Li, Jianling(lijianling@mail.nwpu.edu.cn) ; Meng, Baoqing(mengbaoqing@imech.ac.cn)
英文摘要The present work numerically investigates the effects of periodic sinusoidal and more realistic random spatial heterogeneities on near-limit detonation propagation in a thin explosive slab confined by inert layers and analyzes the mechanisms of these effects. Random heterogeneity is modeled by superimposing sinusoidal ripples with random center coordinates. Results demonstrate that sinusoidal and random heterogeneities with appropriate sizes, particularly 5-50 times the half-reaction zone length, produce clear regular and irregular cellular-like complex shock structures, respectively, and enhance propagation velocity, thus narrowing the critical thickness corresponding to the thinnest reactive layer for self-sustained detonation. Larger amplitudes or random distributions, representing higher degrees of heterogeneity, further extend propagation limits. In contrast, heterogeneities with wavelengths smaller than the reaction zone are rapidly averaged out, and the detonation characteristics converge to those of the homogeneous case. When the size of individual perturbations is comparable to the charge thickness, a velocity deficit occurs. The mechanisms of the impact of appropriate-sized and large-sized heterogeneities on detonation propagation are explained from the perspectives of energy release and loss. Appropriate-sized heterogeneities cause localized energy release inhomogeneity, inducing unstable transverse waves and triple-point structures that accelerate reaction rates, while elevated inert layer impedance mitigates lateral losses. The influence mechanism of large-scale heterogeneities lies in the alteration of sonic surface positions. As the detonation wave passes through the high-density zone, a significant portion of the heat is released outside the sonic surface, and more explosives at the edge of the high-density zone are driven into the inert layer.
分类号一类/力学重要期刊
WOS关键词CONCENTRATION GRADIENT ; INITIATION
资助项目National Natural Science Foundation of China - 'YE Qisun' Science Foundation Project[12472262] ; National Natural Science Foundation of China - 'YE Qisun' Science Foundation Project[12302445] ; National Natural Science Foundation of China - 'YE Qisun' Science Foundation Project[12432012] ; National Natural Science Foundation of China[SYSZZ2024-02] ; National Key Laboratory of Computational Physics Research Foundation[CX2025073] ; Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University[XDB0620203] ; Strategic Priority Research Program of Chinese Academy of Sciences
WOS研究方向Mechanics ; Physics
语种英语
WOS记录号WOS:001537250900022
资助机构National Natural Science Foundation of China - 'YE Qisun' Science Foundation Project ; National Natural Science Foundation of China ; National Key Laboratory of Computational Physics Research Foundation ; Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University ; Strategic Priority Research Program of Chinese Academy of Sciences
其他责任者Li, Jianling，孟宝清
源URL[http://dspace.imech.ac.cn/handle/311007/102352]  
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.Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China;
2.Northwestern Polytech Univ, Sch Power & Energy, Xian 710072, Peoples R China;
3.Inst Appl Phys & Computat Math, Natl Key Lab Computat Phys, Beijing 100088, Peoples R China;
4.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
5.Xian Modern Chem Res Inst, Xian 710065, Peoples R China;
推荐引用方式
GB/T 7714		 He, Jiahui,Li, Hongbin,Li, Jianling,et al. Influence and mechanism analysis of spatial heterogeneity on the propagation characteristics of near-limit detonation[J]. PHYSICS OF FLUIDS,2025,37(7):19.
APA He, Jiahui,Li, Hongbin,Li, Jianling,Tian, Baolin,&孟宝清.(2025).Influence and mechanism analysis of spatial heterogeneity on the propagation characteristics of near-limit detonation.PHYSICS OF FLUIDS,37(7),19.
MLA He, Jiahui,et al."Influence and mechanism analysis of spatial heterogeneity on the propagation characteristics of near-limit detonation".PHYSICS OF FLUIDS 37.7(2025):19.

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来源：力学研究所

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