Influence of air flow parameters on nanosecond repetitively pulsed discharges in a pin-annular electrode configuration
Influence of air flow parameters on nanosecond repetitively pulsed discharges in a pin-annular electrode configuration
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DOI：
10.1088/0022-3727/49/15/155205
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
S. Heitz;J. Moeck;T. Schuller;D. Veynante;D. Lacoste
中科院分区：
文献类型：
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作者：
S. Heitz;J. Moeck;T. Schuller;D. Veynante;D. Lacoste
研究了大气压下不同气流参数对纳秒重复脉冲（NRP）放电等离子体区的影响。这两个电极是在一个销环形配置，横向的平均流量。电压脉冲的幅度高达15 kV，持续时间为10 ns，重复频率范围为15至30 kHz。研究了不同稳态和谐波振荡条件下NRP电晕-NRP火花（C-S）和NRP火花-NRP电晕（S-C）的转捩。首先，验证了横向流动对C-S和S-C转变的强烈影响，如以前的研究所报道的。第二，它表明，由旋流器所赋予的方位流不影响政权过渡电压。最后，研究了由扬声器产生的气流的低频谐波振荡的影响。的频率和振幅的来流调制的NRP等离子体制度的强烈影响进行了观察。基于NRP放电的累积效应和电极间区域中流体颗粒的停留时间的分析来解释结果。
The effect of various air flow parameters on the plasma regimes of nanosecond repetitively pulsed (NRP) discharges is investigated at atmospheric pressure. The two electrodes are in a pin-annular configuration, transverse to the mean flow. The voltage pulses have amplitudes up to 15 kV, a duration of 10 ns and a repetition frequency ranging from 15 to 30 kHz. The NRP corona to NRP spark (C-S) regime transition and the NRP spark to NRP corona (S-C) regime transition are investigated for different steady and harmonically oscillating flows. First, the strong effect of a transverse flow on the C-S and S-C transitions, as reported in previous studies, is verified. Second, it is shown that the azimuthal flow imparted by a swirler does not affect the regime transition voltages. Finally, the influence of low frequency harmonic oscillations of the air flow, generated by a loudspeaker, is studied. A strong effect of frequency and amplitude of the incoming flow modulation on the NRP plasma regime is observed. Results are interpreted based on the cumulative effect of the NRP discharges and an analysis of the residence times of fluid particles in the inter-electrode region.