纳秒脉冲激励的表面介质阻挡放电中表面电离波传播特性

doi:10.19595/j.cnki.1000-6753.tces.190616

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摘要表面介质阻挡放电(SDBD)激励器在等离子体主动流动控制中应用广泛,其表面电离波(SIW)传播特性是优化激励器控制效果的重要参数之一。该文分别以聚四氟乙烯(PTFE)和环氧树脂(ER)为介质材料,制作了多地电极阵列结构的表面介质阻挡放电激励器,采用纳秒高压脉冲电源作为激励源,对表面介质阻挡放电中的表面电离波传播特性进行了实验研究。实验结果表明,在脉冲电压的上升沿发生了两次击穿,形成放电通道,分别为初级电离波和次级电离波。在电流曲线上表现为有两个峰值,第一个电流峰值指示初级电离波,第二个电流峰值指示次级电离波。对不同位置处的电流曲线进行积分得到其电荷分布与演化,发现靠近高压电极处的电荷消散的较快,远离高压电极处的电荷消散的较慢,且聚四氟乙烯介质在放电后有明显的电荷残余,而环氧树脂介质电荷残余不明显。此外,研究了外加电压幅值和重复频率对SIW传播特性的影响,结果表明,当保持电压幅值不变(14kV),在100~1 000Hz范围内,脉冲重复频率越高,SIW的电流衰减速率越快,而SIW传播速度变化不大。保持重复频率不变(500Hz),在8~17kV范围内,脉冲电压幅值对SIW的电流衰减速率基本没有影响,但是SIW的传播速度随着脉冲电压幅值的增大而增加。该研究结果有助于SDBD激励器的放电参数优化。

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	叶成园
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关键词 ：表面介质阻挡放电, 表面电离波, 电荷消散, 电流衰减速率, 传播速度

Abstract：Surface dielectric barrier discharge (SDBD) actuator is widely used in plasma flow control. The surface ionization wave (SIW) propagation is one of the important parameters for optimizing the control effect of the actuator. In this paper, using PTFE and epoxy resin (ER) as dielectric materials, surface dielectric barrier discharge actuator with multi-GND electrode array structure was fabricated. The propagation characteristics of surface ionization wave in the surface dielectric barrier discharge were studied experimentally using nanosecond high voltage pulse power supply. The experimental results show that at the rising edge of the pulse voltage, two breakdowns occur, forming a discharge channel, namely the primary ionization wave and the secondary ionization respectively. There are two peaks on the current curve, the first peak indicates the primary ionization wave, and the second peak indicates the secondly ionization wave. The charge distribution and evolution are obtained by integrating the current curves at different positions. It is found that the charge electrode dissipates faster near the high voltage, while electrode dissipates more slowly when the charge far away from the high voltage. Moreover, the charge residual of PTFE medium is obvious after discharge, but that of ER medium is not obvious. In addition, the effects of applied voltage amplitude and repetition frequency on SIW propagation characteristics were studied. With a constant voltage amplitude (14kV), the repetition frequency has little influence on the propagation speed of SIW in the range of 100~1 000Hz, but the decay speed of SIW is faster with the increase of the repetition. With a constant repetition frequency (500Hz), when the voltage amplitude changes from 8kV to 17kV, it is found that the voltage amplitude has little influence on the decay of SIW, but the propagation speed of SIW increases with the increase of the voltage amplitude. The results are helpful to the optimize the discharge parameters of SDBD actuator.

Key words： Surface dielectric barrier discharge surface ionization wave charge dissipate propagation velocity current decay rate

收稿日期: 2019-05-22

PACS:

TM85

基金资助:国家自然科学基金资助项目(51777204,51911530118)

通讯作者: 黄邦斗男,1992年生,博士,研究方向为纳秒脉冲放电、等离子体诊断和等离子体化学等。E-mail: huangbangdou@mail.iee.ac.cn

作者简介: 叶成园男,1992年生,硕士研究生,研究方向为脉冲功率与等离子体应用。E-mail: yechengyuan@mail.iee.ac.cn

引用本文:

叶成园, 黄邦斗, 章程, 陈根永, 邵涛. 纳秒脉冲激励的表面介质阻挡放电中表面电离波传播特性[J]. 电工技术学报, 2020, 35(12): 2652-2661. Ye Chengyuan, Huang Bangdou, Zhang Cheng, Chen Genyong, Shao Tao. The Propagation Characteristics of Surface Ionization Wave in Surface Dielectric Barrier Discharge Sustained by the Nanosecond Pulse Voltage. Transactions of China Electrotechnical Society, 2020, 35(12): 2652-2661.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.190616 https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I12/2652

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