Fundamentals of Electrodynamic Technique of Numerical Designing of Helical High-Explosive Magnetic Generators

Abstract

Presented are the fundamentals of a consistently electrodynamic 2-D technique of designing helical explosive magnetic generators by numerical simulation on the basis of nonuniform equation for the vector potential with a priori set right-side term. The technique is demonstrated by solving a 1-D problem. A model 2-D problem a closed coil over a tube is analyzed. A coil current rupture is simulated. Concepts of vacuum inductance and free magnetic flux are discussed. Magnetic flux losses in the skin layer and free magnetic flux variation are calculated for an instant compression of an electric contour. A 2-D nonstationary problem a closed coil over a tube is solved. A critical mode of the generator operation is analyzed. A technique is described for solving a problem multiturn helix over a tube.Index Terms-Fully electrodynamic method, helical high-explosive magnetic generator (EMG), numerical simulation, vector potential.