Research on arc evolution law of arc extin-ction device under high-speed large current Untersuchung des Lichtbogenverhaltens in Abhängigkeit des Lichtbogenabschaltgerätes bei hohen Geschwindigkeiten und hohen Stromstärken

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialwissenschaft und Werkstofftechnik Pub Date : 2024-08-06 DOI:10.1002/mawe.202300218

M. C. Jia, T. Huang, K. X. Song, X. H. Guo, J. Feng, X. Wang, H. T. Song

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Abstract

The lifespan of the guide rail is a bottleneck restricting the operational life of electromagnetic railguns. A well-designed arc extinguishing device can reduce the arcing erosion caused by residual currents within the guide rail. The CuW alloy is widely used in the high-pressure arc extinction field due to its excellent electrical and thermal conductivity, high strength, and hardness. Based on the theory of equilibrium state arc plasma, a finite element model of the air arc-CuW electrode coupling in the arc extinction device was established to study millisecond-level arc initiation, evolution, extinguishing characteristics, and distribution patterns under extreme and harsh operational conditions with a current input of 110 kA. The highest temperature in the arc column region was found to exceed 50,000 K. The study elucidated the influence of arc extinction device parameters on arc evolution, breakdown time, and breakdown voltage. Consequently, it established that the R70 spherical electrode exhibits optimal arc extinguishing characteristics. The aim of this research is to provide theoretical support for optimizing the arc suppression device. Additionally, experiments on high-speed and high-current arc extinction device discharges were conducted to validate the finite element analysis results regarding arc diffusion patterns and electrode erosion.

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高速大电流条件下灭弧装置的电弧演变规律研究高速大电流条件下灭弧装置的电弧行为研究

导轨的使用寿命是限制电磁轨道炮工作寿命的瓶颈。设计精良的灭弧装置可以减少导轨内残余电流造成的电弧侵蚀。CuW 合金因其优异的导电性、导热性、高强度和硬度而被广泛应用于高压灭弧领域。基于平衡态电弧等离子体理论，建立了灭弧装置中空气电弧-CuW 电极耦合的有限元模型，研究了在输入电流为 110 kA 的极端恶劣运行条件下毫秒级电弧的起弧、演化、熄灭特性和分布模式。发现弧柱区域的最高温度超过 50,000 K。研究阐明了灭弧装置参数对电弧演化、击穿时间和击穿电压的影响。因此，研究确定 R70 球形电极具有最佳灭弧特性。这项研究旨在为优化灭弧装置提供理论支持。此外，还进行了高速大电流灭弧装置放电实验，以验证有关电弧扩散模式和电极侵蚀的有限元分析结果。

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来源期刊

Materialwissenschaft und Werkstofftechnik 工程技术-材料科学：综合

CiteScore

2.10

自引率

9.10%

发文量

154

审稿时长

4-8 weeks

期刊介绍： Materialwissenschaft und Werkstofftechnik provides fundamental and practical information for those concerned with materials development, manufacture, and testing. Both technical and economic aspects are taken into consideration in order to facilitate choice of the material that best suits the purpose at hand. Review articles summarize new developments and offer fresh insight into the various aspects of the discipline. Recent results regarding material selection, use and testing are described in original articles, which also deal with failure treatment and investigation. Abstracts of new publications from other journals as well as lectures presented at meetings and reports about forthcoming events round off the journal.