Estimation of detonation front curvature radius by empirical equations

Sućeska, Muhamed; Tumara, Barbara Štimac; Dobrilović, Mario; Bohanek, Vječislav

doi:10.1080/07370652.2022.2052207

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…The consequences of the non-ideal behaviour of ANFO are manifested in the strong dependence of the detonation parameters on the charge diameter [3,6,7], existence and characteristics of the confinement [8][9][10][11][12][13], in a curved shock front [2,7,[14][15][16], the existence of a fraction of unreacted ANFO at the sonic point [2,3,14], and a large failure diameter [6,16]. The effects of the confinement characteristic on the detonation properties of ANFO are studied by several researchers [8-11, 17, 18].…”

Section: Introductionmentioning

confidence: 99%

An empirical confinement model for ANFO explosive

Suceska,

Bohanek,

Dobrilovic

et al. 2024

Propellants Explo Pyrotec

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Ammonium‐nitrate‐fuel‐oil (ANFO) explosive, one of the most used mining explosives, exhibits highly non‐ideal behaviour. The non‐ideality of the detonation is manifested in the strong dependence of the detonation velocity on the charge radius and existence and the characteristics of confinement. This can lead to the detonation velocities as low as one‐third of the ideal velocity. The literature reported experimental detonation velocities of cylindrical ANFO charges confined in different confiners (aluminium, copper, steel, polymethyl methacrylate, and polyvinyl chloride) are analysed in this paper. An empirical confinement model, which relates the detonation velocity to the charge radius and the mass of the confiner to the mass of explosive ratio per unit length, is proposed. The model predicts the detonation velocity of unconfined and confined ANFO charges with a mean average percentage error of 8.8 %.

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Section: Introductionmentioning

confidence: 99%

An empirical confinement model for ANFO explosive

Suceska,

Bohanek,

Dobrilovic

et al. 2024

Propellants Explo Pyrotec

Self Cite

View full text Add to dashboard Cite

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Numerical modeling of charge diameter effect on detonation properties of emulsion explosives using Wood-Kirkwood detonation model

Tumara

Sućeska

Dobrilović

et al. 2022

Journal of Energetic Materials

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Shock Initiation and Propagation of Detonation in ANFO

et al. 2023

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The ammonium nitrate (AN) and fuel oil (FO) mixture known as ANFO is a typical representative of non-ideal explosives. In contrast to ideal explosives, the detonation behavior of ANFO exhibits a strong dependence on charge diameter, existence, and properties of confinement, with a large failure diameter and long distance required to establish steady-state detonation. In this study shock initiation and propagation of detonation in ANFO were studied experimentally by determining the detonation velocity at different distances from the initiation point, as well as by numerical modeling using AUTODYN hydrodynamics code and a Wood–Kirkwood detonation model incorporated into EXPLO5 thermochemical code. The run-to-steady-state detonation velocity distance was determined as a function of charge diameter, booster charge mass, and confinement. It was demonstrated that a Lee–Tarver ignition and growth reactive flow model with properly calibrated rate constants was capable of correctly ascertaining experimentally observed shock initiation behavior and propagation of detonation in ANFO, as well as the effects of charge diameter, booster mass, and confinement.

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Estimation of detonation front curvature radius by empirical equations

Cited by 3 publications

References 17 publications

An empirical confinement model for ANFO explosive

An empirical confinement model for ANFO explosive

Numerical modeling of charge diameter effect on detonation properties of emulsion explosives using Wood-Kirkwood detonation model

Shock Initiation and Propagation of Detonation in ANFO

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