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首页> 外文期刊>The European physical journal. Applied physics >Numerical simulation of influence of anode current density distributions on anode melting pool flow in high-current vacuum arc subjected to axial magnetic fields
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Numerical simulation of influence of anode current density distributions on anode melting pool flow in high-current vacuum arc subjected to axial magnetic fields

机译：轴向磁场作用下大电流真空电弧中阳极电流密度分布对阳极熔池流动影响的数值模拟

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摘要

In order to investigate the formation reason and influence factors of anode melting pool rotation in high-current vacuum arcs (HCVAs) subjected to axial magnetic field (AMF), the rotational symmetric magnetohydrodynamic (MHD) model of anode melting pool flow (AMPF) phenomena in HCVA is established. Based on this model, the influence of different anode current density distributions (ACDDs) on AMPF is simulated and analyzed. Simulation results show that the influence of ACDDs on rotational velocity of AMPF is significant. According to simulation results, the more nonuniform ACDDs can lead to the more rotational velocity. That is to say, the more serious current constriction in HCVA will lead to the larger rotational velocity of AMPF. The changing trend of rotational velocity in simulation results at different moments is in agreement with the experimental observation. Experimental and simulation results both show that the maximal rotational velocity appears at 9-10 ms moments.
机译：为了研究轴向磁场（AMF）下大电流真空电弧（HCVA）中阳极熔池旋转的形成原因和影响因素，提出了阳极熔池流动（AMPF）现象的旋转对称磁流体动力学（MHD）模型。在HCVA建立。基于该模型，模拟和分析了不同阳极电流密度分布（ACDDs）对AMPF的影响。仿真结果表明，ACDDs对AMPF转速的影响很大。根据仿真结果，越不均匀的ACDD可以导致更大的旋转速度。也就是说，HCVA中更严重的电流收缩将导致AMPF的旋转速度更大。模拟结果在不同时刻的转速变化趋势与实验观察相符。实验和仿真结果均表明，最大旋转速度出现在9-10毫秒的瞬间。

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