Thermobaric effects formed by aluminum foils enveloping cylindrical charges

Qi Long Yan; Waldemar A. Trzciński; Stanisław Cudziło; Józef Paszula; Trană Eugen; Matache Liviu; Rotariu Traian; Michael Gozin

doi:https://doi.org/10.1016/j.combustflame.2016.01.010

Thermobaric effects formed by aluminum foils enveloping cylindrical charges

Qi Long Yan, Waldemar A. Trzciński, Stanisław Cudziło, Józef Paszula, Trană Eugen, Matache Liviu, Rotariu Traian, Michael Gozin

School of Chemistry

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

Conceptually new cylindrical charges enveloped by Al foils have been designed and their thermobaric effects, due to simultaneous fragmentation and combustion of the foils, have been experimentally determined. The fragmentation processes of Al foil was supported by numerical simulations. It has been shown that the quasistatic pressures (QSP) for phlegmatized RDX (RDX_ph) enveloped with Al-coated plastic foils are higher than that of the pure RDX_ph, due to combustion of these foil fragments in a thermobaric explosion. The QSP generated by Al-Ni foils enveloping RDX_ph was found to be much lower than performance of other foils, possibly due to relatively inert nature of Ni. In a small detonation chamber, the charges of RDX_ph/Al foil (RDX_ph/Alf) produced even higher experimental maximum peak pressure (δp_max) than the charges that contained Al powder (Al_p). In a closed bunker, the impulse amplitudes of RDX_ph enveloped by aluminized polyethylene (Al-PE) foils and RDX_ph enveloped by 100μm Alf (Alf100) charges are much lower than those of the other charges. It was found that the charges enveloped by Al foils have even larger δp_max than that of RDX_ph/Al_p charges, indicating that the Alf could generate better blast performances than the Al_p. The simulations indicate that the observed blast enhancement is dependent not on the thickness, but on the size of surrounding space. The thermobaric fire-ball generated by 40g RDX/Alf charge could sustain combustion up to 40ms, reaching a maximum radius of about 2.4m.

Original language	English
Pages (from-to)	148-157
Number of pages	10
Journal	Combustion and Flame
Volume	166
DOIs	https://doi.org/10.1016/j.combustflame.2016.01.010
State	Published - 1 Apr 2016

Keywords

Al foil
Combustion
Detonation
Explosives
Thermobaric

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Fuel Technology
Energy Engineering and Power Technology
Physics and Astronomy(all)

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https://doi.org/10.1016/j.combustflame.2016.01.010

Cite this

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title = "Thermobaric effects formed by aluminum foils enveloping cylindrical charges",

abstract = "Conceptually new cylindrical charges enveloped by Al foils have been designed and their thermobaric effects, due to simultaneous fragmentation and combustion of the foils, have been experimentally determined. The fragmentation processes of Al foil was supported by numerical simulations. It has been shown that the quasistatic pressures (QSP) for phlegmatized RDX (RDXph) enveloped with Al-coated plastic foils are higher than that of the pure RDXph, due to combustion of these foil fragments in a thermobaric explosion. The QSP generated by Al-Ni foils enveloping RDXph was found to be much lower than performance of other foils, possibly due to relatively inert nature of Ni. In a small detonation chamber, the charges of RDXph/Al foil (RDXph/Alf) produced even higher experimental maximum peak pressure (δpmax) than the charges that contained Al powder (Alp). In a closed bunker, the impulse amplitudes of RDXph enveloped by aluminized polyethylene (Al-PE) foils and RDXph enveloped by 100μm Alf (Alf100) charges are much lower than those of the other charges. It was found that the charges enveloped by Al foils have even larger δpmax than that of RDXph/Alp charges, indicating that the Alf could generate better blast performances than the Alp. The simulations indicate that the observed blast enhancement is dependent not on the thickness, but on the size of surrounding space. The thermobaric fire-ball generated by 40g RDX/Alf charge could sustain combustion up to 40ms, reaching a maximum radius of about 2.4m.",

keywords = "Al foil, Combustion, Detonation, Explosives, Thermobaric",

author = "Yan, {Qi Long} and Trzci{\'n}ski, {Waldemar A.} and Stanis{\l}aw Cudzi{\l}o and J{\'o}zef Paszula and Tran{\u a} Eugen and Matache Liviu and Rotariu Traian and Michael Gozin",

note = "Publisher Copyright: {\textcopyright} 2016 The Combustion Institute.",

year = "2016",

month = apr,

day = "1",

doi = "https://doi.org/10.1016/j.combustflame.2016.01.010",

language = "الإنجليزيّة",

volume = "166",

pages = "148--157",

journal = "Combustion and Flame",

issn = "0010-2180",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Thermobaric effects formed by aluminum foils enveloping cylindrical charges

AU - Yan, Qi Long

AU - Trzciński, Waldemar A.

AU - Cudziło, Stanisław

AU - Paszula, Józef

AU - Eugen, Trană

AU - Liviu, Matache

AU - Traian, Rotariu

AU - Gozin, Michael

PY - 2016/4/1

Y1 - 2016/4/1

N2 - Conceptually new cylindrical charges enveloped by Al foils have been designed and their thermobaric effects, due to simultaneous fragmentation and combustion of the foils, have been experimentally determined. The fragmentation processes of Al foil was supported by numerical simulations. It has been shown that the quasistatic pressures (QSP) for phlegmatized RDX (RDXph) enveloped with Al-coated plastic foils are higher than that of the pure RDXph, due to combustion of these foil fragments in a thermobaric explosion. The QSP generated by Al-Ni foils enveloping RDXph was found to be much lower than performance of other foils, possibly due to relatively inert nature of Ni. In a small detonation chamber, the charges of RDXph/Al foil (RDXph/Alf) produced even higher experimental maximum peak pressure (δpmax) than the charges that contained Al powder (Alp). In a closed bunker, the impulse amplitudes of RDXph enveloped by aluminized polyethylene (Al-PE) foils and RDXph enveloped by 100μm Alf (Alf100) charges are much lower than those of the other charges. It was found that the charges enveloped by Al foils have even larger δpmax than that of RDXph/Alp charges, indicating that the Alf could generate better blast performances than the Alp. The simulations indicate that the observed blast enhancement is dependent not on the thickness, but on the size of surrounding space. The thermobaric fire-ball generated by 40g RDX/Alf charge could sustain combustion up to 40ms, reaching a maximum radius of about 2.4m.

AB - Conceptually new cylindrical charges enveloped by Al foils have been designed and their thermobaric effects, due to simultaneous fragmentation and combustion of the foils, have been experimentally determined. The fragmentation processes of Al foil was supported by numerical simulations. It has been shown that the quasistatic pressures (QSP) for phlegmatized RDX (RDXph) enveloped with Al-coated plastic foils are higher than that of the pure RDXph, due to combustion of these foil fragments in a thermobaric explosion. The QSP generated by Al-Ni foils enveloping RDXph was found to be much lower than performance of other foils, possibly due to relatively inert nature of Ni. In a small detonation chamber, the charges of RDXph/Al foil (RDXph/Alf) produced even higher experimental maximum peak pressure (δpmax) than the charges that contained Al powder (Alp). In a closed bunker, the impulse amplitudes of RDXph enveloped by aluminized polyethylene (Al-PE) foils and RDXph enveloped by 100μm Alf (Alf100) charges are much lower than those of the other charges. It was found that the charges enveloped by Al foils have even larger δpmax than that of RDXph/Alp charges, indicating that the Alf could generate better blast performances than the Alp. The simulations indicate that the observed blast enhancement is dependent not on the thickness, but on the size of surrounding space. The thermobaric fire-ball generated by 40g RDX/Alf charge could sustain combustion up to 40ms, reaching a maximum radius of about 2.4m.

KW - Al foil

KW - Combustion

KW - Detonation

KW - Explosives

KW - Thermobaric

UR - http://www.scopus.com/inward/record.url?scp=84969331244&partnerID=8YFLogxK

U2 - https://doi.org/10.1016/j.combustflame.2016.01.010

DO - https://doi.org/10.1016/j.combustflame.2016.01.010

M3 - مقالة

SN - 0010-2180

VL - 166

SP - 148

EP - 157

JO - Combustion and Flame

JF - Combustion and Flame

ER -

Thermobaric effects formed by aluminum foils enveloping cylindrical charges

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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