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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Characterization of a rotating gliding arc in argon at atmospheric pressure
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Characterization of a rotating gliding arc in argon at atmospheric pressure

机译：氩气在大气压下旋转滑动弧的表征

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The dynamics of a low-power ( 40 W) rotating gliding arc in atmospheric pressure argon sustained by a homemade dual DC power supply between a conical cathode and a grounded sleeve anode and forced into motion by the combined action of a vortex gas flow ( 26.3 SLPM) and axial magnetic field (similar to 0.043-0.122 T) was studied. High-speed imaging and electrical diagnostics were used to gain an understanding of the projected arc length, position of the attachment point on the central cathode, and frequency of arc rotation. The electrical signals revealed a glow-type mode of operation, which characteristically low current and high voltage. The square root dependency of the rotating arc frequency on the applied current predicted by a simplified model considering the gas vortex drag and Lorentz forces was confirmed with measurements. Rotation frequencies in the similar to 100-300 Hz range with average projected arc lengths of 4-8 mm creating a large stabilized reactive volume were obtained. We further demonstrated that the Lorentz force acting on the rotating gliding arc is equivalent to the hydrodynamic drag caused by an argon flow rate of similar to 8 SLPM for this device configuration.
机译：低功率（＆ 40 w）的动态在锥形阴极和接地套筒阳极之间的自制双直流电源和接地套筒阳极之间的自制双直流电源旋转滑动弧，并通过涡流气流的组合作用强制出来（第26.3个SLPM）和轴向磁场（类似于0.043-0.122 T）。高速成像和电气诊断用于了解突出的电弧长度，附接点的位置在中央阴极上的位置，以及电弧旋转的频率。电信号揭示了发光型操作模式，其特征性地低电流和高电压。考虑到气体涡流阻力和洛伦兹力的简化模型预测的旋转电弧频率对施加电流的平方根依赖性进行了测量。获得的旋转频率在类似于100-300赫兹范围内，得到了4-8毫米的平均投影电弧长度，产生了大稳定的反应体积。我们进一步证明，作用在旋转滑动弧上的洛伦兹力等同于由于该装置配置的类似于8个SLPM的氩流量速率而导致的流体动力拖动。

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