Research On One-Dimensional Magneto-Hydrodynamics Code SSS-MHD And Simulation On Configurations In Experiments

The technique of magnetically driven isentropic compression on planar solid sample, according to smooth ascend magnetic pressure produced by pulse power current through plate electrode, is a brand-new experimental one with significant application prospect. The main method of high pressure isentropic compression on low-density material is cylindrical liner implosion driven by explosion, which compresses the initial magnetic filed to mighty high one near by axes. Furthemore, the cylindrical liner is a new experimental domain in domestic. The diverse magnetic driven and compression experimental techniques, according to explosion or impulsion current, are becoming the one of main loading methods in contemporary high energy density physics area.The character on this kind of experiment is that is must consider the interaction of sample component as load, transfer structure and electromagnetism in circuit. Furthermore, only the advance non-contact and high precision photo electricity test technique is allowed to use in experiments. The experiment design involves deterninations of sample configuration, geometry scale, load wave and time, and experiment data procession must deduce the physics field distribution in sample according to the measurable data on sample surface. Consequently, for presenting the data that satisfies designing and experimental analyzing, the simulation on magnetic driven and compression experiment must adopt basic equation groups based on multi-physics course, sample configuration with multi-medium and multi-cavity and coupling calculation with circuit real time. The loading method, electromagnetic transfer, photo electricity test, data backward procession, and sample’s course of mechanics, physics and chemistry on request calculation must include detonation action, hydro-elasticity-plastic, plasma physics, magnetic-hydro mechanical, and radiant-hydro mechanical. The calculations of magnetic-hydro mechanical which published in domestic only limit to equation group itself, however, they lack of mluti-cavity calculation function, always recur to experiment current as load condition generally, not draw a conclution from present circuit parameters’ calculation, which are devoid of foresee. For the whole magnetic-hydro mechanical calculation on experiment configuration, the vacuum cavity with magnetic filed is also a medium that mechanical movements effect the variety of circuit directly. Furthermore, the mechanical sample and electromagnetism load become integrative. Only resolving the two crucial questions, centralized parameters circuit is coupled with dynamic inductance calculation using sample configuration, and self-harmonization calculation of the two physics courses, with difference and coupling each other, is achieved.According to basic equation group of magnetic-hydro mechanical in this paper, the one-dimensional elastic-plastic reactive hydrodynamic code SSS extends to magnetic-hydro mechanical calculation under Lagrange coordinate, aim to variety one dimensional experiment configuration on Z or θ direction, the integrative calculation of material dynamics, reactive hydrodynamic and magnetic-hydro mechanical is achieved. However, the real time couple calculation of model and circuit equation group is resolved preferably, and no need to provide the experiment current as input data. Using the code SSS-MHD, the isentropic compression of planar sample in magnetically driven experiment, the magnetism cumulative course, and the isentropic compression on sample tube in implosion cylindrical liner experiment are researched systemic by simulation, the histories of load current and surface velocity on sample, according with experiment data, are received, and the distribution of pressure, density, temperature and entropy inside sample are present.This paper consists of7chapters. Chapter1is the introduction; Chapter2is research status of magnetically driven and compressed experiments; Chapter3is principle, device testing techniques and data processing of magnetically driven and compressed experiments; Chapter4is research of elastic-plastic reactive magnetic hydrodynamic code SSS-MHD; Chapter5is the magnetic-hydro mechanical calculation of magnetically driven isentropic compression on planar sample and high velocity flyer driven by magnetism; Chapter6is the magnetic-hydro mechanical calculation of magnetic flux compression by cylindrical liner implosion; Chapter7is summary and outlook.