中文摘要：

研究气液两相介质阻挡放电（DBD）的放电特性,对其在环保等工业领域中的应用具有重要意义。本文利用气液两相DBD在大气压下产生低温等离子体,以碱性苯胺溶液作为工作溶液,研究了外加电压幅值、电源频率、放电间隙等因素对其放电特性的影响。测量得到电压电流波形和Lissajous图形等电气特性以及发射光谱和发光图像等光学特性,进一步计算得到放电功率、传输电荷、分子振动温度和分子转动温度等主要放电参量,研究他们的变化规律,并结合放电理论对放电机制进行了分析。结果表明,碱性苯胺溶液中气液两相DBD,放电与纯气相DBD类似,但要考虑液体阻抗对放电的影响,其气体温度在650-750 K之间变化,且在光谱特性图波长589 nm处出现Na原子谱线,随频率变化会出现谐振效应,在电源频率为17.5 kHz,放电间隙为4 mm时,其发光强度最强,放电功率和传输电荷最大。

英文摘要：

The plasma was generated by dielectric barrier discharge（ DBD） in gas-liquid mixtures with aniline in an alkaline solution as the working media at atmospheric pressure. The influence of the plasma generating conditions, including the voltage and frequency of power supply, and discharge gap, on the discharge characteristics was evaluated by mea- suring the voltage-current waveforms, Lissajous figures and electrical and optical properties, such as the discharge power, transmitted charge, molecular vibrational and rotational temperature, and by theoretical analysis. The results show that the gas-phase DBD mechanism also accounts for the gas-liquid mixed DBD, except the major impact of the liquid-impedance on discharge. Its gas temperature varied in the range of 650 - 750 K and Na-peak was observed at 589 nm in the emission spectrum. The variations in power supply frequency resulted in a current resonance. The emission intensity, discharge power and transported charge were maximized at a frequency of 17.5 kHz in a discharge gap of 4mm.