AI 中文总结
研究大气压下SDBD等离子体致动器的EHD相互作用，用对称环形致动器表征离子风，研究电极直径和厚度对风速影响，实验与模拟结合，给出优化配置及最大风速，揭示离子风性能与副产物生成权衡，为相关应用提供指导。
AI 中文摘要
本研究通过实验和数值方法研究了大气压下表面介质阻挡放电（SDBD）等离子体致动器产生的电液动力（EHD）相互作用。非热介质阻挡放电产生离子风，使用由同心环和盘形电极组成的对称环形致动器进行表征。与主要产生切向气流的传统线性SDBD致动器不同，这种环形配置产生主要垂直的离子风射流。系统地研究了电极直径D和厚度δ对垂直于电极平面的感应风速的影响。实验结果表明，对于优化的电极配置（D = 32 mm，δ = 0.06 mm），最大风速为3.42 m s⁻¹。数值等离子体-流体模拟支持实验趋势，并提供了等离子体区域内气流速度、电液动力体积力、电子温度和气体压力的空间分布。基于臭氧浓度测量和纹影成像的额外诊断表明，较大直径的电极，特别是22和32 mm的电极，增强了垂直流的高度和发展，同时增加电极直径也促进了臭氧的产生。结果表明离子风性能和反应性副产物生成之间存在重要的权衡。这些发现为优化环形介质阻挡放电等离子体致动器用于主动流动控制、空气净化、臭氧辅助消毒和生物医学等离子体应用提供了实际指导。
英文摘要
This study experimentally and numerically investigates the electrohydrodynamic (EHD) interaction produced by a surface dielectric barrier discharge (SDBD) plasma actuator at atmospheric pressure. The non-thermal dielectric barrier discharge generates ionic wind, which is characterized using a symmetric annular actuator composed of concentric ring and disk electrodes. Unlike conventional linear SDBD actuators that primarily produce tangential airflow, this annular configuration generates a predominantly vertical ionic-wind jet. The effects of electrode diameter D and thickness delta on the induced wind velocity perpendicular to the electrode plane are systematically examined. The experimental results show a maximum wind velocity of 3.42 m s^{-1} for an optimized electrode configuration with D = 32 mm and delta = 0.06 mm. Numerical plasma-fluid simulations support the experimental trends and provide spatial distributions of airflow velocity, electrohydrodynamic volumetric force, electron temperature, and gas pressure in the plasma region. Additional diagnostics based on ozone concentration measurements and Schlieren imaging show that electrodes with larger diameters, particularly 22 and 32 mm, enhance the height and development of the vertical flow, while increasing electrode diameter also promotes ozone production. The results demonstrate an important trade-off between ionic-wind performance and reactive byproduct generation. These findings provide practical guidance for optimizing annular dielectric barrier discharge plasma actuators for active flow control, air purification, ozone-assisted disinfection, and biomedical plasma applications.
Commentspages, 18 figures, 3 tables. Experimental and numerical study of vertical ionic-wind generation by an annular surface dielectric barrier discharge plasma actuator. Includes COMSOL plasma-fluid simulations, Schlieren flow visualization, Pitot-tube velocity measurements, and ozone measurements. Published in Physica Scripta
Journal refPhysica Scripta 101 (2026) 065601
