Simulation of the ignition of organic explosives by a laser pulse in the weak absorption region

Dolgachev, V. A.; Duginov, E. V.; Khaneft, A. V.

doi:10.1134/s0010508217020125

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…where W max ¼ 72:2 Á 10 4 J=m 2 -the energy density of the laser pulse; t i ¼ 20 Á 10 À3 s -the duration of the laser pulse [6]. Thus, the rise time of the laser pulse energy density is…”

Section: Description Of the Numerical Calculationsmentioning

confidence: 99%

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Ignition of Organic Explosive Materials by a Copper Oxide Film Absorbing a Laser Pulse

Dolgachev

Khaneft

Mitrofanov

2018

Propellants Explo Pyrotec

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This work present experimental results of PETN ignition and of numerical simulations of PETN, RDX, HMX, and TATB ignition by a copper oxide (CuO) film heated using a millisecond fiber laser YLS‐150. It was established that the dynamic ignition threshold of organic explosive materials (EM) in a three‐layer system (glass – CuO – EM) by a laser pulse has a minimum at the CuO film thickness of 12 μm . The density of the critical ignition energy of EM is increasing in the sequence of PETN, RDX, HMX, and TATB with PETN having the smallest and TATB having the highest density of the critical ignition energy.

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Section: Description Of the Numerical Calculationsmentioning

confidence: 99%

“…Systems of a CuO -PETN and a glass -CuO -PETN were considered. Recently, a mathematical modeling has been done to determine the ordinary dependence of the ignition threshold by a laser pulse [6] and detonation by impact [7] of organic EM.…”

Section: Introductionmentioning

confidence: 99%

Ignition of Organic Explosive Materials by a Copper Oxide Film Absorbing a Laser Pulse

Dolgachev

Khaneft

Mitrofanov

2018

Propellants Explo Pyrotec

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“…Arrhenius nonlinearity was linearized at each time step using the Frank-Kamenetsky transformation [24]. [29] 235.5 [29] 192.46 [30] 270 [16] T f , K 413 [26] 476 [26] 558 [26] > 623 [31] Steps on the coordinate h z and time h τ of the difference scheme were constant regardless of the thickness of the glass plate, metal film and EM. As the preliminary results of numerical calculations have shown, ignition of, for example, PETN occurs near the boundary of the metal film-EM, in the region with a width of about 10 nm.…”

Section: Formulation Of the Problem And The Methods Of Solutionmentioning

confidence: 99%

“…This is because the laser initiation is immune to electrical signals, which allows one to avoid accidental initiation of explosive material (EM). The second reason for studying the processes of condensed EM ignition is that it is caused by directed regulation of the ignition delay time, and the threshold density of the energy of initiation EM by laser impulses of various duration, intensity, and diameter of the light beam and spectral range [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Organic EM in the impurity absorption region has an insignificant absorption coefficient.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Metal Film Thickness on Ignition of Organic Explosives with a Laser Pulse

2019

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The results of numerical ignition simulation of pentaerythritol tetranitrate (PETN), cyclotrimethylene trinitramine (RDX), cyclotetramethylene tetranitramine (HMX) and 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) by aluminium (Al) and molybdenum (Mo) films heated by nanosecond laser pulses in a three-layer system: glass–metal–explosive material (EM) are presented. Influence of metal film thickness on the time of EM ignition delay was considered. A non-linier dependence of time of delay of ignition of EM from thickness of a metal film is shown. The greatest critical thicknesses of Al and Mo metallic films at which ignition of EM is still possible were determined. It was established that the greater the thickness of the metal film and heat resistance of EM, the greater the heat reserve needed in EM ignition film. It was established that the ignition delay time of EM increases in the sequence of PETN, RDX, HMX and TATB.

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“…Interest in the ignition of energetic materials by the luminous flux has continued to this day. The emergence of experimental and theoretical work is associated with the use of laser systems for EM initiation, as well as studying the mechanism of EM ignition for the purpose of directional control of the EM threshold initiation energy by laser radiation [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Decomposition of CuO Film on Ignition of Organic Explosives by a Laser Pulse

Khaneft

Mitrofanov

Зверев

2019

Propellants Explo Pyrotec

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This work presents experimental results of the PETN ignition in a three-layer system: glass -copper oxide ( CuO) -explosive materials (EM) and results of numerical simulations of the ignition of PETN, RDX, HMX, and TATB with a CuO film heated by a YLS-150 fiber laser with a pulse duration of 20 ms. In the numerical simulations, the endothermic reaction of decomposition of the CuO film and decomposition reaction of EM were taken into account. It has been established that the endothermic effect of the CuO decomposition reaction increases the dynamic ignition delay time of EM. The expression for an estimation of width of a reaction layer in EM at heating by a constant heat stream is obtained. Calculations have shown that the dynamic threshold of ignition of organic explosives by laser pulse in a three-layer system (glass -CuO -EM) has a minimum for the thickness of the copper oxide film of 5 mm. The density of the critical ignition energy of an explosive laser pulse increases in the sequence of PETN, RDX, HMX, and TATB. The calculated dependence of the PETN dynamic ignition delay time on the thickness of the CuO film is consistent with the experimental data.

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Simulation of the ignition of organic explosives by a laser pulse in the weak absorption region

Cited by 7 publications

References 3 publications

Ignition of Organic Explosive Materials by a Copper Oxide Film Absorbing a Laser Pulse

Ignition of Organic Explosive Materials by a Copper Oxide Film Absorbing a Laser Pulse

The Effect of Metal Film Thickness on Ignition of Organic Explosives with a Laser Pulse

Effect of Decomposition of CuO Film on Ignition of Organic Explosives by a Laser Pulse

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