中文摘要：

为深入理解气液两相介质阻挡放电的机理和特征,利用多针–平板电极结构,测量了气液两相DBD的电学和光学放电特性,研究了放电电气参量及放电空间主要粒子强度随外加电压的变化趋势,并根据实验结果建立了放电的等效电路模型,利用其结合放电机理对所得到的结果进行了分析和讨论。结果表明：气液两相DBD的放电与纯气相DBD放电相类似,但还要考虑液体阻抗对放电的影响,其放电电流为阻容性,超前电压的角度〈90°。气相放电中产生了大量的N2、O和OH等活性粒子,放电功率、传输电荷和电子密度等主要放电参量均随外加电压的增加而增大,而气隙电容随外加电压增加而减小,外加电压20.5 k V时,它们的值分别为78 W、1 060 n C、1.87×10^（11） cm^（-3）和8.07 p F,气相放电可用电压控制电流源（VCCS）、电阻和可变电容来等效,而液体可用可变电阻等效,计算得到放电前其值为825？。

英文摘要：

In order to further understand the mechanism and characteristics of dielectric barrier discharge（DBD） in gas-liquid mixture, the electrical and optical characteristics of DBD in gas-liquid mixture with multiple needles to plate electrode structure were measured. The changing trends of electrical parameters and intensities of the main particles with the applied voltage were studied. Moreover, the equivalent electrical model for DBD in gas-liquid mixture was established according to experimental results, and it was used to analyze the experimental results. Results show that the discharge characteristics of DBD in gas-liquid mixture are similar to those in pure gas, but the impact of liquid resistance on the discharge should be taken into account. Its discharge current is in resistance-capacitance type, whose phase angle leads that of voltage less than 90°. A large number of N2, O, OH, and other high-active particles are produced in gas phase of the discharge, and the discharge power, transmission charge, electron density and the main discharge parameters increase with the increasing of applied voltage but the gas capacitance decreases with the increasing of applied voltage. When the applied voltage is 20.5 k V, their values are 78 W, 1 060 n C, 1.87×10^（11） cm^（-3）,and 8.07 p F, respectively. The gas discharge can be equivalent to a voltage-controlled current source（VCCS）, resistance and variable capacitance, and the liquid can be equivalent to a variable resistor, whose value is calculated to be 825 ？ before discharge.