Numerical simulation and experimental study on the characteristics of armature wear and contact process of small caliber railgun

IF 5 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术) Pub Date : 2025-03-22 DOI:10.1016/j.dt.2025.03.015

Huayi Zhang , Benfeng Gu , Baoming Li, Chunxia Yang

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引用次数: 0

Abstract

During the electromagnetic railgun launch process, high temperature and high current conditions can lead to armature wear, affecting armature/rail contact and degrading launch performance. This paper starts with the analysis of the metal liquid film formation at the armature/rail contact interface. 1D and 3D models are developed based on the characteristic relational equation obtained from the melt liquid film model. These models incorporate thermodynamic equilibrium phase diagram, transient heat and mass transfer model, copper-aluminum alloy reaction model, nonlinear electrical conductivity relational equation and nonlinear thermal conductivity relational equation to analyze the temperature distribution and copper-aluminum intermetallic compounds (Cu-Al IMCs) formation in the melt liquid film. The wear mechanism and influence law of armature are explained in detail from different perspectives to understand and predict the transition and gouging phenomena at the contact interface. The model's validity is confirmed by the results of electromagnetic launch experiments, providing insights for future structure design and material selection of the armature and rail.

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小口径轨道炮电枢磨损与接触过程特性的数值模拟与实验研究

在电磁轨道炮发射过程中，高温和大电流条件会导致电枢磨损，影响电枢/导轨接触，降低发射性能。本文从分析电枢/钢轨接触界面金属液膜的形成入手。根据熔体液膜模型得到的特征关系方程，建立了熔体液膜的一维和三维模型。这些模型采用热力学平衡相图、瞬态传热传质模型、铜铝合金反应模型、非线性电导率关系方程和非线性导热系数关系方程来分析熔体液膜中的温度分布和铜铝金属间化合物（Cu-Al IMCs）的形成。从不同角度详细解释了电枢的磨损机理和影响规律，以理解和预测接触界面的过渡和刮蚀现象。电磁发射试验结果验证了模型的有效性，为今后电枢和导轨的结构设计和材料选择提供了参考。

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

Defence Technology(防务技术) Mechanical Engineering, Control and Systems Engineering, Industrial and Manufacturing Engineering

CiteScore

8.70

自引率

0.00%

发文量

728

审稿时长

25 days

期刊介绍： Defence Technology, a peer reviewed journal, is published monthly and aims to become the best international academic exchange platform for the research related to defence technology. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.