摘要
沿面介质阻挡放电(SDBD)等离子体在空气动力学、生物医学以及环境保护等领域具有广阔的应用前景。为了进一步了解激励器结构对SDBD等离子体放电特性参数的影响,采用光电联合测量手段,分析了在ns脉冲电源作用下,等离子体激励器电极的封装和对称性对放电电流、N2(C3Πu)振转温度、电子温度、电子密度等等离子体特性参数的影响。结果表明:封装有利于稳定放电,能够提高发射光谱的强度和振转温度,增加电子密度;与非对称结构等离子体激励器相比,对称结构等离子激励器放电发生的时刻较早,存在较为明显的二次放电,且具有较高的电流峰值、N2(C3Πu)振转温度、电子温度以及电子密度。当频率从200 Hz增加到1 400 Hz时,3种结构等离子体激励器放电对应的谱线强度和转动温度增加,振动温度下降,电子温度受重复频率的影响较小。研究结果有利于深入理解ns脉冲的放电机理及能量传递机理。
The plasma generated by surface dielectric barrier discharge （SDBD） has a promising application prospect at the field of aerodynamic, biomedicine and environmental protection. In order to understand the influence of the actuator configuration on the generation of the plasma and its characteristics, we experimentally studied the optical emission and electrical characteristics of the SDBD plasma excited by nanosecond pulsed voltage at atmospheric pressure. The influences of the encapsulation and symmetry of the electrode on the plasma parameters, such as the current, N2（C3 ∏u） vibrational and rotational temperature, electron temperature, electron density, etc., were analyzed, respectively. It is found that the presence of the encapsulation is beneficial to the stabilization of the discharge, increasing the spectral intensity, vibrational and rotational temperature and electron density. Compared with the asymmetric actuator, the discharge of the symmetric actuator occurs earlier with the higher current value, N2（C3IIu） vibrational and rotational temperature and electron temperature and density. There is an obvious second discharge in the symmetric discharge. As the frequency increases from 200 Hz to 1 400 Hz, the emission intensities and rotational temperature will rise, while the vibrational temperature exhibits a down trend, and the electron temperature remains almost unchanged for all the three actuator configures. The result is useful to understanding the mechanism of the nanosecond discharge and the energy transmission.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第9期2936-2942,共7页
High Voltage Engineering
基金
国家自然科学基金(51077089)~~
