CAJ | 학술논문

纳秒脉冲沿面介质阻挡放电在流动控制领II有很好的应用前景，研究纳秒脉冲沿面介质阻挡放电特性对于认识纳秒脉冲放电的物理过程具有重要意义。首先建立了沿面介质阻挡放电的电路模型，并基于小波软阈值降噪法对实验获得的纳秒脉冲电压和回路总电流波形进行降噪，然后根据对所建立的电路模型的分析给出了放电电流的计算方法，进而研究了气流环境中不同脉冲电压幅值、脉冲重复频率和脉冲极性下的放电电流、电荷传输和沉积能量特性，并进行了分析。结果表明：单个脉冲的上升沿和下降沿各存在一次放电；放电电流、最大传输电荷量和沉积能量特性存在极性效应，且正相关于施加脉冲电压幅值；最大传输电荷量和沉积能量随重复频率的增加先减小后增大，且重复频率对放电电流的峰值和宽度有影响。该研究有助于对纳秒脉冲沿面介质阻挡放电发展过程的研究，并为瞬时沉积能量的计算奠定基础。
납초맥충연면개질조당방전재류동공제령II유흔호적응용전경，연구납초맥충연면개질조당방전특성대우인식납초맥충방전적물리과정구유중요의의。수선건립료연면개질조당방전적전로모형，병기우소파연역치강조법대실험획득적납초맥충전압화회로총전류파형진행강조，연후근거대소건립적전로모형적분석급출료방전전류적계산방법，진이연구료기류배경중불동맥충전압폭치、맥충중복빈솔화맥충겁성하적방전전류、전하전수화침적능량특성，병진행료분석。결과표명：단개맥충적상승연화하강연각존재일차방전；방전전류、최대전수전하량화침적능량특성존재겁성효응，차정상관우시가맥충전압폭치；최대전수전하량화침적능량수중복빈솔적증가선감소후증대，차중복빈솔대방전전류적봉치화관도유영향。해연구유조우대납초맥충연면개질조당방전발전과정적연구，병위순시침적능량적계산전정기출。
Nanosecond pulse plasma flow control, as an effective active flow control technique, has been widely investigated around the globe. Investigating the characteristics of the nanosecond pulsed surface dielectric barrier discharge is rather crucial to understanding the mechanism of nanosecond pulsed discharge. A circuit model was developed for surface dielectric barrier discharge actuator. Wavelet soft-threshold denoisation was employed to denoise the applied voltage and the total loop current recorded in the experiment. Based on the analysis of the circuit model, a method of extracting the discharge current from the experimental data was proposed. Furthermore, the influences of three factors, namely the applied voltage, the repetition frequency and the polarity of the pulse, on the characteristics of the discharge current, charge transport and total deposited energy were examined. The results show that there exist two discharges under the rising and falling period of one single pulse; the discharge current, maximum transporting charge and deposited energy during the discharge are polarity-dependent, and positively related with the applied voltage. Besides, the maximum transporting charge and deposited energy firstly decrease and then increase with the increase of repetitive frequency. Moreover, the repetitive frequency has an impact on the peak value and the width of the discharge current. This paper can be helpful to the study on the development of nanosecond pulse surface dielectric barrier discharge and the calculation of deposited energy into plasma.