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Numerical Simulation of Projectile Impact Experiments Using The Forest FireReaction Rate Model

机译：基于森林火灾反​​应率模型的弹丸撞击试验数值模拟

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We describe the development of a two-dimensional multimaterial reactive Eulerianhydrocode to model the detonation of condensed phase explosives, and use the code to model the projectile impact initiation of explosives. The code solves the Euler equations for the conservation of mass, momentum, and energy for an inviscid, compressible fluid using the Flux Corrected Transport algorithm. The condensed phase materials are modelled using a Mie-Gruneisen equation of state, while the Becker-Kistiakowsky-Wilson equation of state is used to describe the gaseous detonation products. The Forest Fire reaction rate model is used to describe the rate of energy release from the explosive, and a modified Young's algorithm is used to maintain a sharp interface between different materials on the computational mesh. The code was used to simulate the impact of a cylindrical steel projectile against Composition B explosive, and the threshold velocity for the onset of detonation was found to be dependent on the diameter of the projectile. Our computed results are in good agreement with experimental values, as well as with results obtained from Mader's 2DE reactive hydrocode. The work described here will provide the ADF with an improved methodology to assess bullet/fragment hazards, and assist in the development of an Insensitive Munitions capability.

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