不同级联方式的多级沿面介质阻挡等离子体激励器的放电和反推力特性研究

为研究不同级联方式下，多级沿面介质阻挡等离子体激励器的放电和反推力特性的不同，本文基于典型的沿面介质阻挡等离子体激励器结构，开展了单级、两级并联和两级串联激励器在静止大气环境下的放电实验和天平测力实验。实验中，激励器的驱动电压波形为正弦波，频率为1 kHz~3 kHz。通过高压探头和电子天平分别测得激励器工作的电流、电压信号和其产生的反推力，基于Lissajous图分析了激励器的放电功率。最后，从伏安特性、放电功率、反推力和放电辉光等方面对实验结果进行了对比分析，获得以下结论：在同样的驱动电压参数下，两级并联激励器的放电电流、放电功率和反推力均相对最大，两级串联激励器的则相对最小，单级激励器居中。在工作模式方面，两级并联激励器的每级承载电压相同，相互独立，放电同步，但存在逆向放电；两级串联激励器的每级间存在强耦合，承载电压不同，放电不同步，接高压端级放电优先，近接地级放电迟缓，由于等势体的存在，不存在逆向放电。

Investigation of the Characteristics of Discharge and Thrust of Multiple-Unit Surface Dielectric Barrier Discharge Plasma Actuator Under Different Junction Model

In order to study the difference of the characteristics of the discharge and the thrust of multiple-unit surface dielectric barrier discharge plasma actuator under different junction models, based on the classic configuration of surface dielectric barrier discharge plasma actuator (SDBDPA), the discharge and the thrust measurement of the single SDBDPA, two-unit-parallel SDBDPA and two-unit-series SDBDPA were operated in still atmosphere. In the experiment, the actuators were driven by the sine wave voltage with the frequencies of 1 kHz to 3 kHz. The current, voltage signal and the thrust of SDBDPAs were measured by the high-voltage probe, oscilloscope and the high precision electronic balance respectively. The discharge power was obtained by Lissajous analysis. By comparing with the characteristics of the voltage-ampere, the discharge power, the thrust and the glow of the three SDBDPAs, the following conclusions were obtained: driven by the same voltage and frequency, the discharge current, the discharge power and the thrust of the two-unit-parallel SDBDPA were the largest, the ones of the two-unit-series SDBDPA were the smallest. In working model, in two-unit-parallel SDBDPA, the voltage amplitude of each unit was the same, and the discharge of each unit was mutually independent and synchronous, but there was parasitic ionization and reverse discharge between the two units, but in two-unit-series SDBDPA, there was strong coupling between the discharge of each unit, the voltage amplitude of each unit was different and the discharge was asynchronous that the high-voltage unit discharged earlier than the near-ground unit. However, there was no parasitic ionization or reverse discharge in two-unit-series SDBDPA because of the existence of the equipotential body.