2-D Simulations of the NRL (Naval Research Laboratory) Laser Experiment.
Abstract
Two-dimensional gas-dynamic simulations of the NRL laser experiment have been performed to study the formation of aneurysms in the blast wave and to study the formation of structure internal to the blast front itself. In one set of simulations the debris shell was perturbed sinusoidally in mass and position and also perturbed to mimic the action of a slow jet of material leaving the target at slower speeds than the bulk of the debris. In all cases the blast wave remained stable to any aneurysm-like instability. Internal structure, however, was quite easily produced and grew as a function of time. In the other set of simulations the effect of a pre-heated channel upon the propagation of the blast wave was examined. Bulges in the blast wave shock front were produced in these simulations that could be the beginning of the aneurysm phenomenon, but the preheated channel by itself appears to be insufficient to produce the observed aneurysm. Keywords include: Gas-dynamics; Numerical simulation; Laser; Stability; Blast waves.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 08, 1985
- Accession Number
- ADA154915
Entities
People
- J. G. Lyon
Organizations
- United States Naval Research Laboratory