Obstacles as Probes of the Blast Wave Interior in the NRL LASER/HANE Simulation Experiment.
NAVAL RESEARCH LAB WASHINGTON DC
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It is proposed that small obstacles be placed in the path of the expanding blast wave to probe the dynamics of the interior cavity formed after a laser target interaction. The theory of attached and detached shocks for cones and spheres in supersonic streams is briefly reviewed. Graphs of the results for a ratio of specific heat gamma 1.2 and 53 are presented for estimating the local Mach number in the cavity from the experimental results. It is also suggested that theoretical and numerical models of the experiment predict the temporal evolution of the bow shock stand off distance for a blunt obstacle. A direct comparison with the experiment can then verify or rule out the competing models.