Comparing two non-equilibrium approaches to modelling of a free-burning arc
Comparing two non-equilibrium approaches to modelling of a free-burning arc
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DOI：
10.1088/0963-0252/22/6/065017
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发表时间：
2013-12-01
影响因子：
3.8
通讯作者：
Cunha, M. D.
中科院分区：
文献类型：
--
作者：
Baeva, M.;Uhrlandt, D.;Cunha, M. D.
两个模型的高压电弧放电进行了比较，并与实验数据的大气压自由燃烧电弧在氩气中的电弧电流为20-200 A。该模型占空间电荷效应和热和电离的非平衡在有些不同的方式。一个模型考虑了空间电荷效应，热和电离的非平衡在近阴极区域和热非平衡在散装等离子体。另一个模型考虑了整个电弧等离子体中的热和电离非平衡以及近阴极区域的空间电荷效应。这两种模型都能够预测的电弧电压与实验数据在公平的协议。在电弧附着到阴极中观察到差异，其对于超过75 A的电弧电流不会强烈影响近阴极电压降和总电弧电压。对于较低的电弧电流的差异是显着的，但弧柱结构是非常相似的，预测的散装等离子体特性是相对接近彼此。
Two models of high-pressure arc discharges are compared with each other and with experimental data for an atmospheric-pressure free-burning arc in argon for arc currents of 20-200 A. The models account for space-charge effects and thermal and ionization non-equilibrium in somewhat different ways. One model considers space-charge effects, thermal and ionization non-equilibrium in the near-cathode region and thermal non-equilibrium in the bulk plasma. The other model considers thermal and ionization non-equilibrium in the entire arc plasma and space-charge effects in the near-cathode region. Both models are capable of predicting the arc voltage in fair agreement with experimental data. Differences are observed in the arc attachment to the cathode, which do not strongly affect the near-cathode voltage drop and the total arc voltage for arc currents exceeding 75 A. For lower arc currents the difference is significant but the arc column structure is quite similar and the predicted bulk plasma characteristics are relatively close to each other.