激励电压对沿面介质阻挡放电特性的影响分析

近年来, 沿面介质阻挡放电(SDBD) 用作大气压下气流控制的等离子体激励器因其众多的优点受到了广泛的关注. 然而, 国内外对沿面介质阻挡放电及其应用的研究尚处于探索阶段, 对其放电特性的影响因素缺乏规律性的认识. 因此, 对SDBD 相关特性和影响因素进行研究具有重要理论意义和应用价值. 本文使用频率5 ~20 kHz,峰值电压0~30 kV 的可调正弦交流电源激励大气压环境下的 SDBD 装置. 通过调节激励电压大小, 研究了其与SDBD 放电特性之间的关系, 对等离子体放电电流、 放电形貌、 功率损耗、 诱导气流以及机械效率进行了分析. 实验结果表明,SDBD 消耗功率、 放电强度和诱导气流均会随着激励电压的增大而增大, 但机械效率存在先增大后减小的趋势, 说明等离子体流动控制中研究中存在最佳效率点.

Influence of Applied Voltage on Surface Dielectric Barrier Discharge Characteristics

Inrecent years, surface dielectric barrier discharge (SDBD) with numerous advantages has been widely used as a plasma actuatorfor gas flow control at atmospheric pressure. However, the researches on the SDBD and its applications at the home and abroad are still in the exploratory stage, and there is a lack of regular understanding of the factors affecting its discharge characteristics. Therefore, it is of great theoretical significance and application value to study the related charac-teristics and influencing factors of SDBD. In this paper, an adjustable sinusoidal AC power supply with a frequency of 5 ~20 kHz and a peak voltage of 0~30 kVis used to excite the SDBD device under atmospheric pressure. By adjusting the magnitude of the applied voltage, the relationship between the voltage and the discharge characteristics of SDBD was studied. In this paper, aspects of the plasma discharge current, the plasma morphology, the power consumption, the induced airflow, and mechanical efficiency were analyzed. The experimental results indicate that the power consumption, the discharge intensity and induced airflow increase with the increasing of applied voltage. While the mechanical efficiency increase firstly and then decrease, as the applied voltage increase, suggesting that there is a best efficiency value in the study of plasma flow control filed.