Abstract

To study the thermophysical, electrophysical and optical properties of argon, as well as the implementation of various plasma-chemical reactions, a direct-current generator of a high-enthalpy argon plasma jet with a self-adjusting arc length and an expanding channel of the output electrode has been developed. A comparative analysis of the electrophysical characteristics (current–voltage characteristics—CVC, efficiency) in the expanding and cylindrical channels of constant cross section was carried out. Electrical, calorimetric and spectral studies have shown that the created generator of low-temperature plasma provides the formation of a slightly divergent plasma jet of argon with a diameter of 5–8 × 10^–3 m and enthalpy of 5–10 MJ/kg and a mass-average temperature at the outlet of the gas-discharge channel of 5–12 × 10³ K with an electron concentration in the axial plasma of 10¹⁷ cm^–3, the total electric power of the arc discharge 2–10 kW and the plasma-forming gas consumption rate of 1.5–3 × 10^–3 kg/s. Depending on the initial conditions at a distance of 0–3 × 10^–2 m from the nozzle section of the low-temperature plasma generator, the plasma flow velocity varies from 990 to 300 m/s.

中文翻译：

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带有输出通道扩展的低温氩等离子体发生器

摘要

为了研究氩的热物理，电物理和光学性质，以及各种等离子体化学反应的实现，使用了具有自调节电弧长度和扩展通道的高焓氩等离子体射流的直流发生器。已开发出输出电极。对具有恒定横截面的膨胀和圆柱形通道中的电物理特性（电流-电压特性-CVC，效率）进行了比较分析。电学，量热学和光谱学研究表明，所创建的低温等离子体发生器可形成直径为5–8×10 ^–3的氩气稍微发散的等离子体射流。m和焓为5–10 MJ / kg，气体放电通道出口的质量平均温度为5–12×10 ³ K，轴向等离子体中的电子浓度为10 ¹⁷ cm ^–3，电弧放电的功率为2–10 kW，等离子体气体的消耗率为1.5–3×10 ^–3 kg / s。根据距低温等离子体发生器喷嘴部分0–3×10 ^–2 m处的初始条件，等离子体流速在990至300 m / s之间变化。