交流激励下的锯齿环状表面介质阻挡放电特性  

Sawtooth Annular Surface Dielectric Barrier Discharge Characteristics Under High Frequency Alternating Current Power

作　　者：徐海笑 姜慧[1] 杨永杰 龚子羿 杨帆[1] XU Haixiao;JIANG Hui;YANG Yongjie;GONG Ziyi;YANG Fan(State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]输变电装备技术全国重点实验室(重庆大学电气工程学院),重庆400044

出　　处：《高电压技术》2025年第4期2049-2059,共11页High Voltage Engineering

基　　金：国家自然科学基金(52377135);国家重点研发计划(2021YFB2401700)。

摘　　要：为探究高压电极形状对环状表面介质阻挡放电特性和气动激励的影响,设计了一种锯齿环状激励器并研究了交流电源激励下锯齿数量对电流波形、放电图像、功率、推力和流场的影响。研究结果表明:增加锯齿后电压上升期间的电流脉冲数增多,这与锯齿极不均匀的电场与暴露电极长度的增加有关;平均功率与电压近似线性关系且功率随锯齿数增加逐渐降低。锯齿的存在使环状电极内边缘放电通道更加集中,较为密集的锯齿结构有助于改善放电的均匀性。锯齿环状表面介质阻挡放电以更低的功率产生更大面积的等离子体,锯齿数等于12时等离子体分布的对称性达到最优。相邻锯齿外电场的抵消作用抑制了微放电的产生,外电场分布决定了放电面积的增长。锯齿结构增大了环状激励器的推力和推功比,推力的增加与电流脉冲数和平均功率有关。流场在水平方向的分布随锯齿数增加逐渐变窄,放电产生的动量在垂直方向上更加集中。In order to investigate the influences of the high-voltage electrode shape on the annular surface dielectric barrier discharge characteristics and aerodynamic excitation,a sawtooth annular actuator was designed in this paper,and the influences of sawtooth number on current waveforms,discharge images,discharge power,thrust and flow field under alternating current power were investigated.The research results show that the number of current pulses during the voltage rise period increases after increasing the sawtooth,which is related to the electric field distribution of sawtooth and the increase of exposed electrode length.The average power and voltage have an approximately linear relationship and the average power decreases gradually as the number of sawtooth increases.The existence of sawtooth results in the concentration of discharge channels at the inner edge of the electrode,and the relatively dense sawtooth structure design helps to improve the uniformity of discharge.The sawtooth annular surface dielectric barrier discharge produces a larger area of plasma at lower power,and the symmetry of the plasma distribution reaches the best when the number of sawtooth is equal to 12.The cancellation effect of the external electric fields of adjacent sawtooth results in the suppression of micro-discharge formation.The external electric field distribution determines the growth of the discharge area.The sawtooth structure increases the thrust and thrust-to-power ratio of the annular actuator.The increase in thrust is related to the number of current pulses and the average power.The horizontal distribution of the flow field gradually narrows as the number of sawtooth increases,and the momentum generated by the discharge is more concentrated in the vertical direction.

关 键 词：表面介质阻挡放电 锯齿电极 微放电 放电面积 推力 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]