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首页> 外文期刊>Plasma Science, IEEE Transactions on >Dynamics of Pantograph–Catenary Arc During the Pantograph Lowering Process
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Dynamics of Pantograph–Catenary Arc During the Pantograph Lowering Process

机译：受电弓下降过程中受电弓–链弧的动力学

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摘要

Pantograph-catenary (PC) arc has become an obstacle for the further development of high-speed railway. Understanding on the underlying physical mechanisms of PC arc dynamics is still far away from satisfactory; therefore, researches from both experimental and numerical aspects are urgently required. This paper focused on the dynamic characteristics of PC arc during the pantograph lowering process by numerical simulation method. A PC arc model was established based on the classical magnetohydrodynamics theory, with the temporal evolution of PC arc dynamics considered. The dynamic mesh technique was utilized to take care of the departure process between the pantograph and the catenary. Detailed behaviors of arc plasmas during the pantograph lowering process were presented by the temperature distribution and flow filed. Two interesting vortexes located below the catenary were found. The vortexes rotated in the opposite direction, resulting from the special gas flow motion during the pantograph movement. Furthermore, the gas flow brought about a thermal pinch effect on arc column, which had a significant influence on the next behaviors of arc plasmas. Besides, the effects of input current on the arc characteristics were studied.
机译：受电弓（PC）弧已成为高速铁路进一步发展的障碍。对PC电弧动力学的基本物理机制的理解仍远未令人满意。因此，迫切需要从实验和数值两个方面进行研究。通过数值模拟方法研究了受电弓下降过程中PC弧的动态特性。基于经典的磁流体动力学理论，建立了PC电弧模型，并考虑了PC电弧动力学的时间演化。利用动态网格技术来处理受电弓和接触网之间的离开过程。受电弓降低过程中，电弧等离子体的详细行为由温度分布和流场表示。发现了位于悬链线下方的两个有趣的涡旋。由于受电弓运动期间的特殊气流，涡旋沿相反的方向旋转。此外，气流对电弧柱产生热收缩效应，这对电弧等离子体的后续行为产生了重大影响。此外，研究了输入电流对电弧特性的影响。

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