双介质低温等离子体空气放电光谱分析及工作参数对 NOx生成的影响

依据介质阻挡放电原理及低温等离子体转化有害气体的机理，设计了一套双介质阻挡放电型低温等离子体空气放电试验系统。研究了空气流量、激励电压峰峰值（VP‐P）及放电频率对空气放电特性及其产生的NO，NO2体积分数变化的影响，并采集了放电区域光谱信息。研究结果表明：当VP‐P、空气流量保持恒定时，NO，NO2的体积分数随放电频率的增大而逐渐减小；当放电频率、VP‐P保持恒定时，NO，NO2的体积分数均随空气流量的增大而逐渐减小；保持放电频率不变，VP‐P从13kV增大到28kV过程中，氮气发射特征谱线强度逐渐增大；保持VP‐P不变，放电频率从7kHz增大到11kHz过程中，氮气特征谱线强度逐渐减小。

Spectral Analysis of Air Discharge and Effect of Working Parameters on NOx Generation for Double-dielectric Non-thermal Plasma Reactor

A set of air discharge test system for double‐dielectric non‐thermal plasma reactor was designed according to the principle of dielectric barrier discharge and the conversion mechanism of harmful gas for non‐thermal plasma .The effects of air flow ,discharge voltage peak‐peak value VP‐P and discharge frequency on air discharge characteristics and volume fractions of NO and NO2 were studied and the spectral information of discharge area was collected at the same time .The results showed that the volume fractions of NO and NO2 decreased with the increase of discharge frequency and air flow respectively when the other two parameters kept constant .In addition ,the intensity of nitrogen characteristic spectrum increased when the discharge volt‐age peak‐peak value increased to 28 kV from 13 kV under the constant discharge frequency and decreased when the discharge frequency increased to 11 kHz from 7 kHz under the constant discharge voltage peak‐peak value .