多脉冲均匀介质阻挡放电特性的仿真及实验研究

Simulation and Experimental Studies on Discharge Characteristics of Multiple Pulse Homogeneous Dielectric Barrier Discharge

为了简化实验,优化反应器设计,扩大均匀介质阻挡放电的应用范围,基于用电压控制电流源(VCCS)模拟均匀放电过程的介质阻挡放电(DBD)等效电路模型,利用Simulink建立了大气压多脉冲均匀DBD的动态仿真模型。模型中采用适于表征均匀DBD的VCCS激励信号,建立了开关控制模块再来对VCCS进行控制,从而实现对放电电流脉冲个数的调节。利用所建模型对大气压氖气中平板电极结构DBD的电气特性进行了仿真,得到了不同条件下多脉冲均匀DBD的电压电流波形以及Lissajous图形。同时,建立了大气压氖气中DBD实验装置并对不同电压幅值下的放电特性进行了实验研究,还将仿真与实验所得到的结果进行了比较。结果表明,利用所建模型仿真得到的电压电流图形和Lissajous图均与实验测量结果相符合,验证了仿真模型的正确性。利用仿真模型进一步计算得到了实际实验过程中无法直接测量获得的放电参量,如气隙电压、介质电压、放电电流、放电功率、传输电荷等。由仿真得到的伏安特性曲线可知,氖气中多脉冲放电除第1次脉冲放电为Townsend放电转化为辉光放电,其余脉冲放电皆为辉光放电。

In order to simplify experiments, to optimize the reactor design, and to expand the range of the homogeneous dielectric harrier discharge, we developed a dynamic simulation model for multiple pulses homogeneous dielectric barrier discharge （DBD）. In this model, an equivalent electrical model in which a voltage controlled current source （VCCS） is used to simulate homogeneous discharge is adopted, and a switch control module is established to control the VCCS to achieve the functions of adjusting of the number of the pulses. The electrical characteristics of the plane-parallel configuration homogeneous DBD in Ne at atmospheric pressure is studied using the model, and the voltage and current waveforms and Lissajous figures under different conditions are obtained. The electrical characteristics of homogeneous DBD at different voltage amplitudes are also experimentally studied , and the simulation results and experimental results are compared. It is shown that the simulated voltage and current waveforms and Lissajous figures are consistent with experimental ones. The dynamic behavior of the discharge parameters, such as gas gap voltage, discharge current, discharge consumed power, and transported charges which can not be measured in the real discharge process can be calculated with the electrical simulation model. From the voltage-current characteristics curves obtained from simulation, it is known that, except the first discharge current pulse which represents the translation from Townsend discharge into glow discharge, the rest discharge current pulse are all glow discharge.