CAJ | 학술논문

研究大电流真空电弧形态和等离子体参数的演变过程对于进一步理解真空电弧具有重要意义。该文采用 Ansys计算分析了真空灭弧室中杯状电极和1/3匝线圈电极间的纵向磁场。分别计算了在峰值时刻，电弧初始扩散2ms 内电极间的纵向磁场分布。计算结果表明，杯状电极间纵磁呈钟形分布而线圈式电极类似马鞍形分布。在电弧初始扩散阶段，电极间纵向磁场很弱，纵磁随时间增大。利用以上磁场分布，对两种大容量电极进行磁流体建模和仿真，在大开断电流条件下，与杯状电极比较，线圈电极沿径向扩散更明显。随着电弧的扩散，电流密度的分布更加均匀，离子温度最大值由阳极中心转移到弧柱边沿，电子温度在整个电弧中趋于3eV。将仿真结果与弧柱图像作对比，计算光强的变化与弧柱亮度变化一致。
연구대전류진공전호형태화등리자체삼수적연변과정대우진일보리해진공전호구유중요의의。해문채용 Ansys계산분석료진공멸호실중배상전겁화1/3잡선권전겁간적종향자장。분별계산료재봉치시각，전호초시확산2ms 내전겁간적종향자장분포。계산결과표명，배상전겁간종자정종형분포이선권식전겁유사마안형분포。재전호초시확산계단，전겁간종향자장흔약，종자수시간증대。이용이상자장분포，대량충대용량전겁진행자류체건모화방진，재대개단전류조건하，여배상전겁비교，선권전겁연경향확산경명현。수착전호적확산，전류밀도적분포경가균균，리자온도최대치유양겁중심전이도호주변연，전자온도재정개전호중추우3eV。장방진결과여호주도상작대비，계산광강적변화여호주량도변화일치。
The research of evolution process of high-current vacuum arc and its plasma parameters is crucial to understand vacuum arc mechanism. The axial magnetic field (AMF) distributions of cup-shaped electrode and coil-shaped electrode were simulated by Ansys software at the peak-value moment and within the initial arc diffusion period (2ms). According to the simulation results, the AMF generated by cup-shaped electrode presents a bell-shaped distribution while 3 segments coil-shaped electrode generates a saddle-shaped distribution. During the initial diffusion period of arc, the AMF between the electrodes is very weak and it increases with time going on. A magneto-hydro- dynamics (MHD) behavior of two kinds of high-capacity electrode was simulated according to the aforementioned AMF distribution. Under a high-current interruption condition, the AMF of coil electrode shows a more significant diffusion as a contrast to cup-shaped one. With the arc diffusing, the current density distributes more uniformly and the maximum value of ion temperature moves to the edge of the arc from the center and the electron temperature tends to be 3eV. The simulation results are compared with experimental results, which show that the light intensity change of simulation is in accordance with arc luminance.