导线阵列在r-z和r-phi几何中的压缩特性研究

Digest of Technical Papers. PPC-2003. 14th IEEE International Pulsed Power Conference (IEEE Cat. No.03CH37472) Pub Date : 2003-06-15 DOI:10.1109/PPC.2003.1277658

I. V. Glazyrin, N. G. Karlykhanov, A.N. SIesareva

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引用次数: 0

摘要

通过数值模拟分析了不同类型的不稳定性对线阵在r-z和r-phi几何下压缩动力学的影响:(1)线阵爆炸初期的过热不稳定性导致密度不均匀;(2)激波与磁芯-电晕界面的相互作用导致线材爆炸更加不均匀;(3)在r-phi情况下，随着磁场的存在，在等离子体壳中发展的一系列流体力学不稳定性(RT、RM、Kelvin-Helmholtz)在等离子体中形成管状结构;(4) MHD RT在r-z几何上的不稳定性是降低x射线辐射的主要原因。利用辐射二维MHD编码研究了线阵压缩的演化过程。数值模拟结果与实验数据进行了比较，得到了发电机ANGARA (TRINITI，俄罗斯)。

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Study of characteristics of wire array compression in r-z and r-phi geometries

Influence of different types of instabilities on dynamics of wire array compression in r-z and r-phi geometry is analyzed by numerical simulation: (1) overheating instability at the initial stage of wire explosion leads to nonuniform density; (2) RM instability connected with shock wave interaction with core-corona interface results in more nonuniform wire explosion; (3) a sequence of hydrodynamics instabilities (RT, RM, Kelvin-Helmholtz) with magnetic field existence developing in plasma shell in r-phi case forms a pipe-type structures in plasma; (4) MHD RT instability in r-z geometry plays the main role in decreasing X-ray radiation. Evolution of compression of wire array has been studied with radiation 2D MHD code. Results of numerical simulation have been compared with experimental data obtained on generators ANGARA (TRINITI, Russia).

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Digest of Technical Papers. PPC-2003. 14th IEEE International Pulsed Power Conference (IEEE Cat. No.03CH37472)

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