Empirical Model to Compute the Velocity Histories of Flyers Driven by Electrically Exploding Foils.

摘要

A modification of the gas gun (Gurney) formulation is used to compute the velocity and position histories of flyers driven by electrically exploded metal foils. The model is based on a numerical time integration of an energy conservation statement for the flyer and the expanding high-pressure metal vapor. Empirically altered, experimental power curves are used for the time-dependent energy term in the conservation equation. Computed burst times and flyer velocity histories for 1.5- to 25-mm-square aluminum foils agree favorably with available experimental data. Comparison of calculated and measured results for single cases with exploding copper and magnesium foils suggests that the model is also applicable for these materials.