中文摘要：

研究水蒸气添加对介质阻挡放电特性的影响对获得高活性等离子体和促进其大规模应用具有重要的意义。为此通过电学和光学等诊断方法,研究了水蒸气体积分数对Ar气中介质阻挡放电特性的影响。测量得到电压-电流波形、发光图像及发射光谱谱线等,进一步计算得到放电参量如放电功率、传输电荷、电子激发温度、分子转动温度和分子振动温度等,研究了它们随水蒸气体积分数的变化规律,并结合放电机理分析了水蒸气添加对放电特性的影响。结果表明：保持电源电压幅值不变,随水蒸气体积分数增加,放电发光强度减弱,放电均匀性增强,放电功率和传输电荷减少,转动温度和振动温度增加;氩水介质阻挡放电气体温度维持在610~2 600 K之间,水蒸气体积分数为0.1%时,主要活性粒子谱线的强度达到最大值,具有更高的活性。

英文摘要：

The influences of water vapor addition on discharge characteristics of dielectric barrier discharge （DBD） were studied by electrical and optical diagnostics. The voltage-current waveforms, light-emission pictures, and emission spec- troscopy were measured, and then the discharge parameters such as discharge power, transported charge, electron excitation temperature as well as vibrational temperature and rotational temperature were calculated to study their chang- ing tendencies in the presence of water vapor content. Moreover, the influences of water vapor addition on discharge characteristics of DBD were analyzed by combining discharge mechanism. Results show that when the amplitude of ap- plied voltage is fixed, with the increase of the water vapor content, the lighting emission intensity becomes weak and the discharge filaments become more and more dense, the uniformity of discharge improves, the discharge power and trans- ported charge decreases, but the rotational temperature and vibrational temperature increases. The gas temperature for DBD in argon/water mixtures varies between 610 K and 2 600 K. The intensity of the main active particles reaches their maximum values at water vapor content of 0.1%, and it has higher activity.