A 2-D Axisymmetric Model of a Stretching Jet in ALEGRA

Report No. ARL-TR-3309
Authors: Muge Fermen-Coker
Date/Pages: September 2004; 58 pages
Note: dsdfsf
Abstract: This report presents a numerical model of a stretching copper jet, representative of a Viper shaped charge jet at 35 ?s following detonation. A liner collapse and jet formation model is used to extract data for the jet geometry and the axial velocity distribution. Numerical simulations are carried out using ALEGRA (Arbitrary Lagrangian Eulerian General Research Application), and the results are compared to previously published experimental data and numerical results. ALEGRA results at 35 ?s are then corrected to more accurately reflect experimental observations in the new model representing the stretching jet at the point of impact. Sensitivity studies are conducted using the stretching jet model to determine the effects of computational mesh at later times.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2004