In order to solve the problem of small and asymmetrical plasma area of the gliding arc (GA) in the chemical treatment process, a plasma actuator driven by alternating current (AC) with a frequency of 23.2kHz was designed to multichannel gliding arcs (MGAs) in a rotational air flow at atmospheric pressure. The spatiotemporally resolved discharge characteristics of the MGA, including long-length breakdown, long-term extinction and typical breakdown features, were investigated combining optical and electrical diagnostic methods simultaneously at a flow rate of 250 SLM (standard liter per minute). The response characteristics of MGA under different flow rates were analyzed. On average, the MGA exhibit 48.8% more discharge power compared to traditional single-channel GA under flow rates of 50–250 SLM, which is due to the GAs continual existence at long-length state, representing better stability of the MGA plasma actuators. It was observed that the frequency of typical breakdown and long-term extinction increased as the flow rate accelerated, and the maximum height the GA could reach decreased with the number of channels increasing from 1 to 5, which can be attributed to the power decline of separate channels of GAs at 50 SLM. It was also found that MGA showed a broader plasma distribution of low electron temperature than traditional single-channel GA.

中文翻译：

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旋流中交流多通道滑动电弧放电过程

为解决化学处理过程中滑动电弧（GA）等离子体面积小且不对称的问题，设计了一种频率为23.2kHz的交流电（AC）驱动的多通道滑动电弧（MGAs）等离子驱动器。在大气压下的旋转气流中。在 250 SLM（标准升每分钟）的流速下，同时结合光学和电学诊断方法研究了 MGA 的时空分辨放电特性，包括长击穿、长期消光和典型击穿特征。分析了MGA在不同流速下的响应特性。平均而言，在 50-250 SLM 的流速下，MGA 的放电功率比传统的单通道 GA 高 48.8%，这是由于 GAs 在长长度状态下持续存在，代表了 MGA 等离子体致动器的更好稳定性。观察到典型击穿和长期消光的频率随着流速的增加而增加，随着通道数从 1 增加到 5，GA 可以达到的最大高度减小，这可以归因于功率下降。 50 SLM 的 GA 单独通道。还发现MGA显示出比传统单通道GA更宽的低电子温度等离子体分布。这可以归因于 50 SLM 时 GA 的单独通道的功率下降。还发现MGA显示出比传统单通道GA更宽的低电子温度等离子体分布。这可以归因于 50 SLM 时 GA 的单独通道的功率下降。还发现MGA显示出比传统单通道GA更宽的低电子温度等离子体分布。