Detonation Propagation in 180° Ribs of an Insensitive High Explosive

Lubyatinsky, S. N.; Batalov, S. V.; Garmashev, A. Yu.; Israelyan, V. G.; Kostitsyn, O. V.; Loboiko, B. G.; Pashentsev, V. A.; Sibilev, V. A.; Смирнов, Е. Б.; Filin, V. P.

doi:10.1063/1.1780372

Cited by 9 publications

(14 citation statements)

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“…The difference in the times of detonation-wave arrival on the outer and inner HE boundaries (Δt) characterizes the shape of the detonation wave in the annular gap. The calculated dependence Δt(θ) is in good agreement with the experimen- tal data [12] (Fig. 4).…”

Section: Computation Resultssupporting

confidence: 85%

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Modeling of weakly nonideal detonation of condensed high explosives with a high content of carbon

Grebenkin

Tsarenkova

Shnitko

2008

Combust Explos Shock Waves

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Section: Computation Resultssupporting

confidence: 85%

“…We also modeled the experimental conditions of detonation propagation in an annular gap [12]. The experiment was arranged in a manner to justify the assumption that the system had a plane of symmetry.…”

Section: Computation Resultsmentioning

confidence: 99%

Modeling of weakly nonideal detonation of condensed high explosives with a high content of carbon

Grebenkin

Tsarenkova

Shnitko

2008

Combust Explos Shock Waves

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“…A 95% TATB explosive arc experiment with an inner radius of 7 cm and an outer radius of 10 mm confined on both edges by 0.5 cm of steel was done by Zhou et al [8] Arrival times at 60˚, 90˚ and 125˚ were reported. The measured A set of confined TATB arc experiments was published by Lubyatinsky et al [9].…”

Section: Unconfined and Confined Arcsmentioning

confidence: 99%

“…Ferm et al [7] reported proton radiographical observations of these failing waves. Lubyatinsky et al [8] measured arrival times at the inner and outer edges of 180˚ ribs confined by steel or PMMA. Zhao et al [9] reported arrival times on the inner and outer edges of 125˚ arcs of a 95% TATB PBX confined by steel.…”

Section: Introductionmentioning

confidence: 99%

Ignition and Growth Modeling of Detonating Tatb Cones and Arcs

Tarver¹,

Chidester²

2008

AIP Conference Proceedings

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Abstract. Previously established Ignition and Growth reactive flow models for the detonating triaminotrinitrobenzene (TATB) based plastic bonded explosives LX-17 and PBX 9502 are applied to recent experimental detonation propagation/failure experiments using unconfined cones, confined arcs, and unconfined arcs. The conical experiments are initially overdriven by the convergent geometry and then fail to detonate at smaller diameters than do unconfined cylindrical charges as the radial rarefaction wave lowers the shock pressure and temperature and thus decreases the chemical energy release rate. Unconfined TATB arcs detonate more slowly than cylindrical charges on the inner surface and exhibit large phase velocities on the outer surface. Confinement reduces but does not eliminate these effects. The Ignition and Growth model calculations based on parameters normalized to a great deal of one-, two-and three-dimensional detonation propagation data reproduce these features and agree closely with experimental detonation velocity and arrival time data.

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“…performed by Lubyatinsky et al 2 who presented results of arrival times and front break-out traces of detonation waves propagating in 180…”

Section: Introductionmentioning

confidence: 99%

Detonation propagation in annular arcs of condensed phase explosives

et al. 2017

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We present a numerical study of detonation propagation in unconfined explosive charges shaped as an annular arc (rib). Steady detonation in a straight charge propagates at constant speed but when it enters an annular section, it goes through a transition phase and eventually reaches a new steady state of constant angular velocity. This study examines the speed of the detonation wave along the annular charge during the transition phase and at steady state, as well as its dependence on the dimensions of the annulus. The system is modeled using a recently proposed diffuse-interface formulation which allows for the representation of a twophase explosive and of an additional inert material. The explosive considered is the polymer-bonded TATB-based LX-17 and is modeled using two JWL equations of state and the Ignition and Growth reaction rate law. Results show that steady state speeds are in good agreement with experiment. In the transition phase, the evolution of outer detonation speed deviates from the exponential bounded growth function suggested by previous studies. We propose a new description of the transition phase which consists of two regimes. The first is caused by local effects at the outer edge of the annulus and leads to a dependence of outer detonation speed on angular position along the arc. The second regime is induced by effects originating from the inner edge of the annular charge and leads to the deceleration of the outer detonation until steady state is reached. The study concludes with a parametric study where the dependence of the steady state and the transition phase on the dimensions of the annulus is investigated.

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Detonation Propagation in 180° Ribs of an Insensitive High Explosive

Cited by 9 publications

References 0 publications

Modeling of weakly nonideal detonation of condensed high explosives with a high content of carbon

Modeling of weakly nonideal detonation of condensed high explosives with a high content of carbon

Ignition and Growth Modeling of Detonating Tatb Cones and Arcs

Detonation propagation in annular arcs of condensed phase explosives

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