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

Abstract

This report presents a numerical model of a stretching copper jet, representative of a Viper shaped charge jet at 35 microsecs 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 microsecs 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.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2004
Accession Number
ADA428364

Entities

People

  • Muege Fermen-coker

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aspect Ratio
  • Axisymmetric
  • Cell Size
  • Collapse
  • Detonations
  • Engineering
  • Experimental Data
  • Explosives
  • Geometry
  • Materials
  • Military Research
  • Shaped Charge Jets
  • Shaped Charges
  • Simulations
  • Spreadsheet Software
  • Symmetry
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Computational Modeling and Simulation
  • Fluid Mechanics and Fluid Dynamics.