脉冲电晕放电流光发展和OH自由基二维分布的发射光谱研究  

Analysis of Streamer Properties and Emission Spectroscopy of 2-D OH Distribution of Pulsed Corona Discharge

作　　者：赵磊[1] 高翔[1] 骆仲泱 轩俭勇[1] 江建平[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《光谱学与光谱分析》2011年第11期2901-2905,共5页Spectroscopy and Spectral Analysis

基　　金：国家(863计划)高技术研究发展计划项目(2007AA061804)资助

摘　　要：流光在OH自由基的生成过程中起到重要作用。为了研究流光与OH自由基之间的关系,利用IC-CD拍摄了线板式脉冲电晕放电反应器内流光的形成和发展过程,着重研究了在反应器几何结构固定的情况下,输入峰值电压对流光发展速度和流光在阴极板覆盖范围的影响。实验表明在反应器不击穿的情况下,输入峰值电压越大,越有利于流光的发展,因此生成的高能电子数量越多。此外我们还利用发射光谱法测量了脉冲电晕放电反应器内OH自由基的二维分布特性,并且与流光发展轨迹图对比。OH自由基在放电电场中的分布特性是以电极线为中心向四周扩散,浓度逐渐降低。这个结论和流光在脉冲电晕放电反应器内的发展轨迹图相吻合。Streamer plays a key role in the process of OH radical generation.The propagation of primary and secondary streamers of positive wire-plate pulsed corona discharge was observed using a short gate ICCD in air environment.The influence of the applied voltage on the properties was investigated.It was shown that the primary streamer propagation velocity,electric coverage and length of secondary streamer increased significantly with increasing the applied voltage.Then 2-D OH distribution was investigated by the emission spectrum.With the analysis of the OH emission spectra,the distribution of OH radicals showed a trend of decreasing from the wire electrode to its circumambience.Compared with the streamer propagation trace,the authors found that OH radical distribution and streamer are in the same area.Both OH radical concentration and the intensity of streamer decreased when far away from the wire electrode.

关 键 词：脉冲电晕放电 流光 OH自由基 发射光谱 

分 类 号：O433[机械工程—光学工程]