In order to improve the arc quenching ability of the multigap system, it is important to know the principle of arc quenching and how the chamber structure affects the arc development process in the multigap system. In this study, the two-dimensional geometric model of the multigap system is established based on the magnetohydrodynamics theory in COMSOL multiphysics simulation platform. The principle of arc quenching in the multigap system is explained in detail by analysing the physical characteristics of the arc in the multigap system. The simulation result shows that the arc is compressed at large scales in the semi-closed chambers of the multigap system, which results in an instantaneous temperature rise of the arc, thus, forming the self-expanding airflow. The strong self-expanding airflow cuts off the arc channel and blocks the energy supply of the arc. The influence of the chamber structure on arc quenching in the multigap system is manifested in the fact that proper improvement of the width and depth of the chamber subserves arc cooling, the reduction of the deflection angle and the increment of the number of the chambers are conductive to arc extinction.

中文翻译：

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多间隙系统中腔室结构对电弧淬火的影响

为了提高多间隙系统的灭弧能力，重要的是要了解灭弧原理以及腔室结构如何影响多间隙系统中的电弧发展过程。本研究基于COMSOL多物理场模拟平台中的磁流体动力学理论，建立了多间隙系统的二维几何模型。通过分析多间隙系统中电弧的物理特性，详细解释了多间隙系统中电弧熄灭的原理。仿真结果表明，电弧在多间隙系统的半封闭腔室中被大规模压缩，从而导致电弧的瞬时温度上升，从而形成自膨胀气流。强大的自膨胀气流会切断电弧通道并阻碍电弧的能量供应。在多间隙系统中，腔室结构对灭弧的影响体现在以下事实：适当改善腔室的宽度和深度有助于电弧冷却，减小偏转角和增加腔室数量灭绝。