A hybrid two-phase mixture model of detonation diffraction with compliant confinement - 05/12/12
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Abstract |
A multi-material two-phase hybrid model of heterogeneous explosives, with a reaction rate that is proportional to the gas-phase pressure excess above an ignition threshold, is examined computationally. The explosive is confined within a compliant inert, and the focus is on the behavior of an established detonation as it rounds a 90° corner and undergoes diffraction. The numerical approach, a variant of Godunovʼs method, is designed to capture interfaces between materials that can undergo phase change, and extends previous work of the authors on rigidly-confined two-phase detonations. The dependence of the post-diffraction conduct on the strength of the confinement is explored by holding the reaction-rate prefactor and the ignition threshold fixed, and considering confiners of two different strengths. The aim is to determine whether a detonation that turns the corner successfully when rigidly confined can experience failure when the confinement is compliant.
Le texte complet de cet article est disponible en PDF.Keywords : Detonation, Diffraction, Dead zone, Compliant confinement, Multi-material two-phase model, Interface capturing
Plan
Vol 340 - N° 11-12
P. 804-817 - novembre 2012 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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