Parametric studies of high-heat-flux-induced erosion of surfaces in an electrothermal accelerator

IEEE 1989 International Conference on Plasma Science Pub Date : 1989-05-22 DOI:10.1109/PLASMA.1989.165969

O. Hankins, M. Bourham, O. Auciello, J. Stock, J. Gilligan, B. Wehring

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引用次数: 2

Abstract

Summary form only. The plasma device called SIRENS was designed and constructed to study the phenomena occurring during the interaction of a high-heat flux with a material surface. The device works on the same principle as an electrothermal mass accelerator. A plasma is produced by the ablation of an insulating cylindrical sleeve of Lexan between two tungsten alloy electrodes. The plasma is joule-heated by currents of up to 100 kA and pressure-driven through a stainless steel barrel. A cylindrical material sample (aluminum or Lexan) is placed inside the barrel. A series of experiments were performed to study the erosion/ablation process of the Lexan insulator sleeve and the barrel samples (aluminum and Lexan) for different discharge energies. Erosion measurements were made by individually weighing the sample sections. Selected sections were analyzed using SEM and EDXA, and optical emission spectroscopy of visible light was performed. Other diagnostics used included Rogowski coils, B-dot probes, high-voltage probes, and pressure transducers. The ablation of the Lexan insulator sleeve compared well with predicted results for 10% transmission of heat flux to the surface.<>

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电热加速器中高热流诱导表面侵蚀的参数化研究

只有摘要形式。SIRENS等离子体装置是为了研究高热流与材料表面相互作用过程中发生的现象而设计和制造的。该装置的工作原理与电热质量加速器相同。等离子体是通过烧蚀两个钨合金电极之间的Lexan绝缘圆柱形套管产生的。等离子体通过高达100 kA的电流进行焦耳加热，并通过不锈钢桶进行压力驱动。圆柱形材料样品(铝或Lexan)放置在桶内。通过一系列实验研究了不同放电能量对Lexan绝缘子套和桶状试样(铝和Lexan)的侵蚀/烧蚀过程。侵蚀测量是通过单独称重样品切片来完成的。采用SEM和EDXA对选定的切片进行分析，并进行可见光发射光谱分析。使用的其他诊断方法包括Rogowski线圈、b点探头、高压探头和压力传感器。Lexan绝缘体套管的烧蚀与预测结果相比较，热通量传输到表面的比例为10%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE 1989 International Conference on Plasma Science

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