The characteristics of the dielectric barrier discharge (DBD) equipped with asymmetrical electrode (ring electrode on the upper and disk electrode on the lower) in atmospheric helium are investigated by a two-dimensional self-consistent fluid model. Simulation results show that as the applied voltage increases, the discharge enhances and the onset of discharge advances, which is similar to the results of traditional DBD. However, with the applied voltage increasing, the symmetry of the discharge current pulses in the positive and negative half cycles disappears because of the asymmetric electrode configuration. In addition, only the spatial distribution of the electron density at the peak moments of the first and second current pulses satisfies the complementary characteristics, while the spatial distribution at other peak moments does not meet the complementary characteristics. Moreover, the electric field, near the upper dielectric barrier surface, presents a curtain-like distribution with considerable radial electric field components, which results from the non-uniform radial surface charge distribution and the ring electrode configuration. The relative variation of the radial distribution of surface charge density is largely determined by the geometry of the opposite electrode.

通过二维自洽流体模型研究了大气氦中配备不对称电极（上环电极和下盘电极）的介质阻挡放电（DBD）的特性。仿真结果表明，随着外加电压的增加，放电增强，放电开始提前，这与传统DBD的结果相似。然而，随着施加电压的增加，由于电极配置不对称，正负半周放电电流脉冲的对称性消失。此外，只有第一次和第二次电流脉冲峰值时刻的电子密度空间分布满足互补特性，而其他峰值时刻的空间分布不符合互补特征。此外，靠近上介电势垒表面的电场呈现出具有相当大的径向电场分量的帘状分布，这是由不均匀的径向表面电荷分布和环形电极配置造成的。表面电荷密度径向分布的相对变化很大程度上取决于相对电极的几何形状。