Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"condensed phase explosives"”.
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On Detonation Diffraction in Condensed-Phase Explosives
A recently proposed higher order theory including shock acceleration effects for detonation shock dynamics (DSD) is evaluated for PBX-9502. Comparisons of detonation diffraction in PBX-9502 are made between experiment, multi-material simulations using the calibrated equation of state and reaction …
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Detonation shock and ignition dynamics in condensed phase explosives
… the ignition and dynamics of detonation waves in condensed phase explosives using direct numerical simulations and asymptotic analysis. We develop a model to simulate deflagration to detonation transition in pentaerythritol tetranitrate powders. The model uses a continuum mechanics formulation of …
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Numerical Modelling of Detonation and Ignition of Condensed Phase Explosives
… good understanding of the physical properties of explosives is essential for their safe and efficient usage. Numerical simulations have proven to be an excellent tool with which to develop and verify models which describe both ignition and detonation of explosives. The objective of this work is to …
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The Formation, Propagation and Stability of Self-Sustained Detonation Waves in Gaseous Mixtures, Condensed-Phase Explosives and Media With Hydraulic Resistance
Finally, we consider the propagation of a detonation though media with hydraulic resistance. In the framework of the model three-step reaction we demonstrate multiplicity of the detonation regimes. We construct detonation speed versus friction curves for super-detonation, choking detonation, and …
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A unified multi-physics formulation for combustion modelling
… capture miscible and immiscible behaviour within condensed-phase explosives arising from the co-existence of a reactive carrier mixture of miscible materials, and several material interfaces due to the presence of immiscible impurities such as particles or cavities. The dynamic and thermodynamic …
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Shock compressing liquids on a tabletop microscope, with special focus on detonating nitromethane
… (NM), one of the simplest homogeneous condensed-phase explosives, is explored using a tabletop microscope. The shock is produced using a spatially homogenized laser to launch flyer plates, 0.5 mm diameter, 18 – 37 µm thick disks of Al-1100 at velocities up to 4.5 km/s. Upon impact the …
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Numerical study of detonation in solid explosives under hydrodynamic and elastic-plastic confinement
… The mathematical model is based on a two-phase reactive formulation and is extended with porosity and shock desensitization models. It is coupled with appropriate inert material models for fluids and solids to accurately capture their interaction with the detonation wave. We initially …