A nonlinear characteristic line model of the detonation process of aluminized explosives

DUAN Ji

doi:10.11883/bzycj-2021-0072

Volume 41 Issue 9

Sep. 2021

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DUAN Ji. A nonlinear characteristic line model of the detonation process of aluminized explosives[J]. Explosion And Shock Waves, 2021, 41(9): 092102. doi: 10.11883/bzycj-2021-0072

Citation:

DUAN Ji. A nonlinear characteristic line model of the detonation process of aluminized explosives[J]. Explosion And Shock Waves, 2021, 41(9): 092102. doi: 10.11883/bzycj-2021-0072

DUAN Ji. A nonlinear characteristic line model of the detonation process of aluminized explosives[J]. Explosion And Shock Waves, 2021, 41(9): 092102. doi: 10.11883/bzycj-2021-0072

Citation:

DUAN Ji. A nonlinear characteristic line model of the detonation process of aluminized explosives[J]. Explosion And Shock Waves, 2021, 41(9): 092102. doi: 10.11883/bzycj-2021-0072

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A nonlinear characteristic line model of the detonation process of aluminized explosives

doi: 10.11883/bzycj-2021-0072

DUAN Ji

School of Electromechanic Engineering, North University of China, Taiyuan 030051, Shanxi, China

Received Date: 2021-02-28
Rev Recd Date: 2021-05-08

Available Online: 2021-08-19

Publish Date: 2021-09-14

Abstract

Abstract

Aiming at the non-ideal properties of aluminized explosive, a local isentropic hypothesis of the expansion of aluminized explosive detonation product was proposed, and a nonlinear characteristic line model for aluminized explosive detonation was established, which provides a new theoretical analysis method for studying the non-isentropic flow and the expansion of detonation products. A lot of studies have shown that for micron aluminum powder, the reaction mainly occurs in the expansion zone of detonation products. The aluminum powder was treated as inert in the detonation reaction zone in the model. Considering the reaction rate of the aluminum powder is relatively slow, the expansion process of the detonation products of aluminized explosive was divided into finite time regions. The energy released from the reaction of aluminum powder has a relaxation effect on the state of the products. Based on the relaxation effect, it was assumed that the detonation products flow was approximately isentropic in each time region. Due to the reaction of aluminum powder, the entropy in each time region was different. Based on the theory of isentropic flow of ideal explosive and local isentropic hypothesis, the non-isentropic expansion process of the detonation products of aluminized explosives can be analyzed theoretically. To verify the correctness of the model, metal plate experiments were conducted. Experiments on aluminized explosives and LiF explosives with a particle diameter of 5μm and 50μm to drive 0.5 mm and 1 mm metal plates were designed. The velocity history of the metal plate was measured by a laser displacement interferometer, and then the reaction degree of aluminum powder in the detonation products was calculated from the experimental results. Combined with the nonlinear characteristic line model of the detonation products of aluminized explosives, the velocity of the metal plate driven by aluminized explosives was calculated theoretically. Compared with the experimental results, the non-isentropic model can well describe the contribution of the secondary reaction of aluminum powder to the work ability of explosives, which verifies the correctness of the model for aluminized explosives (micron aluminum powder).
- aluminized explosive,
- local isentropic,
- non-linear,
- characteristic line

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References(19)

References

[1]	MILLER P J. A reactive flow model with coupled reaction kinetics for detonation and combustion in non-ideal explosives [J]. MRS Online Proceedings Library, 1995, 418(1): 413–420. DOI: 10.1557/PROC-418-413.
[2]	MILLER P J, GUIRGUIS R H. Experimental study and model calculations of metal combustion in Al/Ap underwater explosives [J]. MRS Online Proceedings Library, 1992, 296: 299–304. DOI: 10.1557/PROC-296-299.
[3]	MILLER P J, GUIRGUIS R H. Effects of late chemical reactions of the energy partition in non-ideal underwater explosions [J]. AIP Conference Proceedings, 1994, 309(1): 1417–1420. DOI: 10.1063/1.46246.
[4]	FROST D L, GOROSHIN S, RIPLEY R. Effect of scale on the blast wave from a metalized explosive [C] // 13th International Detonation Symposium. Norfolk: ResearchGate Publishing, 2006: 97−109.
[5]	FROST D L, GOROSHIN S, LEVINE J, et al. Critical conditions for ignition of aluminum particles in cylindrical explosive charges [J]. AIP Conference Proceedings, 2006, 845(1): 972–975. DOI: 10.1063/1.2263484.
[6]	ZHANG F, YOSHINAKA A, FROST D. Casing influence on ignition and reaction of aluminum particles in an explosive [C] // 13th International Detonation Symposium. Norfolk: ResearchGate Publishing, 2006: 1242−1251.
[7]	RIPLEY R C, DONAHUE L, DUNBAR T E, et al. Explosion performance of aluminized TNT in a chamber [C] // 19th International Symposium on Military Aspects of Blast and Shock. Calgary: SciTech Connect Press, 2006: 8.
[8]	MILNE A M. Modelling of enhanced blast and heterogeneous explosives [C] // 19th International Symposium on Military Aspects of Blast and Shock. Calgary: SciTech Connect Publishing, 2006: 44.
[9]	COOPER M A, BAER M R, SCHMITT R G, et al. Understanding enhanced blast explosives: a multiscale challenge [C] // 19th International Symposium on Military Aspects of Blast and Shock. Calgary: SciTech Connect Publishing, 2006: 46.
[10]	MASSONI J, SAUREL R, LEFRANCOIS A, et al. Modeling spherical explosions with aluminized energetic materials [J]. Shock Waves, 2006, 16(1): 75–92. DOI: 10.1007/s00193-006-0053-y.
[11]	KIM K, WILSON W, PEIRIS S, et al. Effects of particle damage during detonation of thermobarics on subsequent reactions [C] // 21st International Colloquium, on the Dynamics of Explosions and Reactive Systems. Poitiers, 2007.
[12]	KIM B, PARK J, LEE K C, et al. A reactive flow model for heavily aluminized cyclotrimethylene-trinitramine [J]. Journal of Applied Physics, 2014, 116(2): 023512. DOI: 10.1063/1.4887811.
[13]	VICTOROV S B. The effect of A12O3 phase transitions on detonation properties of aluminized explosives [C] // 12th International Detonation Symposium. San Diego: ResearchGate Publishing, 2002: 639−648.
[14]	裴红波, 焦清介, 覃剑峰. 基于圆筒实验的RDX/Al炸药反应进程 [J]. 爆炸与冲击, 2014, 34(5): 636–640. DOI: 10.11883/1001-1455(2014)05-0636-05. PEI H B, JIAO Q J, QIN J F. Reaction process of aluminized RDX-based explosives based on cylinder test [J]. Explosion and Shock Waves, 2014, 34(5): 636–640. DOI: 10.11883/1001-1455(2014)05-0636-05.
[15]	陈朗, 张寿齐, 赵玉华. 不同铝粉尺寸含铝炸药加速金属能力的研究 [J]. 爆炸与冲击, 1999, 19(3): 250–255. CHEN L, ZHANG S Q, ZHAO Y H. Study of the metal acceleration capacities of aluminized explosives with spherical aluminum particles of different diameter [J]. Explosion and Shock Waves, 1999, 19(3): 250–255.
[16]	ZHANG F, THIBAULT P A, LINK R. Shock interaction with solid particles in condensed matter and related momentum transfer [J]. The Royal Society, 2003, 459(2031): 705–726. DOI: 10.1098/rspa.2002.1045.
[17]	BALAKRISHNAN K, KUHL A L, BELL J B, et al. Ignition of aluminum particle clouds behind reflected shock waves [C] // 23rd International Colloquium on the Dynamics of Explosions and Reactive Systems. Irvine: Research Gate Publishing, 2011: 329−336.
[18]	MILLER P J. Reaction kinetics of aluminum particles in detonation gases [C] // JANNAF PSHS. San Diego, 1994, 615: 413.
[19]	陈朗, 龙新平. 含铝炸药爆轰[M]. 北京: 国防工业出版社, 2004: 93. CHEN L, LONG X P. The detonation of aluminized explosive [M]. Beijing: National Defense Industry Press, 2004: 93.