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100 SIMULATIONS OF IMPLODING SOLID LINER MELTING AND VAPORI ..
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100 SIMULATIONS OF IMPLODING SOLID LINER MELTING AND VAPORIZATION VS LINER THICKNESS
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发表于: 2008-10-30 13:33:34
SIMULATIONS OF IMPLODING SOLID LINER MELTING AND VAPORIZATION VS LINER THICKNESS, AND EVIDENCE FOR “MELT WAVES”
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J. H. Degnan, G. F. Kiuttu, J. D. Letterio, N. F. Roderick, E. L. Ruden
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Air Force Research Laboratory, Directed Energy Directorate, Kirtland AFB, NM, USA
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Abstract
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The Air Force Research Laboratory
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Directed Energy Directorate (AFRL/DE) has,
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over the last several years, conducted
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experiments on the magnetic pressure driven
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implosion of various metal shells (solid liners).
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More recently, AFRL/DE has reported on
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experiments that successfully imploded
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cylindrical aluminum liners suitable for
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compressing field reversed configurations
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(FRC’s) to magnetized target fusion (MTF)
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conditions (1). We have recently done Mach2 (2)
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MHD simulations of the resistive heating of such
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imploding liners as a function of their thickness.
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This was to gain insight on diffusion time effects
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that conceivably could lead to melt waves for
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thicker liners, driven with higher currents. For
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example, scaling the thickness of a liner for
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successful experiment parameters with the
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implosion discharge energy might be expected to
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preserve the timing of liner liquification (or loss
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of material strength). However, diffusion time
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effects can complicate this. Our simulations
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indicate such effects, sometimes referred to as
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