Modelling an IHE Experiment with a Suite of DSD Models

At the 2011 APS conference, Terrones, Burkett and Morris published an experiment primarily designed to allow examination of the propagation of a detonation front in a 3-dimensional charge of PBX9502 insensitive high explosive. The charge is confined by a cylindrical steel shell, has an elliptical tin liner, and is line-initiated along its length. The detonation wave must propagate around the inner hollow region and converge on the opposite side. The Detonation Shock Dynamics (DSD) model allows for the calculation of detonation propagation in a region of explosive using a selection of material input parameters, amongst which is the D-K relation that governs how the local detonation velocity varies as a function of wave curvature. In this paper, experimental data are compared to calculations using the newly-developed 3D DSD code at AWE with a variety of D-K relations. The effects of D-K variation through different calibration methods, material lot and initial density are investigated.