沿面型介质阻挡放电的电气特性

沿面型介质阻挡放电在气流控制等方面具有十分广阔的应用前景。本文对其放电机理进行了分析,指出放电过程中在介质板表面积聚的电荷处会形成一虚拟电极,与放电空间其他电荷共同作用,对放电过程产生影响。基于此,建立放电的等效模型,推导了放电功率的计算公式,并与Lis-sajous图形计算的放电功率比较,具有较好的吻合。讨论了外加电压、频率对放电特性的影响:外加频率相同时,随着外加电压的增加,每半周期内传输的放电电荷不断增大,且其变化趋势与功率增长趋势基本一致,呈非线性增加,同时放电面积增大,功率增加;外加电压一定时,放电功率与频率成正比。

Electrical characteristics of surface dielectric barrier discharge

Surface Dielectric Barrier Discharge(DBD) has broad application prospects in air flow control and has attracted much attention.The paper analyzes the discharge mechanism of Surface DBD,and points out that the charges accumulated on the surface of dielectric in the discharges would form a virtual electrode.The virtual electrode and other charges in the discharge space would affect the discharge process.Then an equivalent model of Surface DBD is created,and the discharge power equation is also derived,which agrees well with the computed results of Lissajous figures.This paper researches the influence of voltages and frequencies on the discharge characteristics,and finally draws the conclusions that the transferred charges increase in the same tendency with the powers when the voltages increase in every half cycle at the constant frequencies,the discharge areas and power increase when the voltages rise and the discharge powers are proportional to the frequencies at the constant voltages.