Experimental and numerical analysis of streamers in pulsed corona and dielectric barrier discharges

被引:54
作者
Kim, YH
Kang, WS
Park, JM
Hong, SH
Song, YH
Kim, SJ
机构
[1] Los Alamos Natl Lab, Plasma Phys Grp, Los Alamos, NM 87545 USA
[2] Seoul Natl Univ, Dept Nucl Engn, Seoul 151742, South Korea
[3] Korea Inst Machinery & Mat, Taejon 305343, South Korea
关键词
dielectric barrier discharge (DBEI); nitrogen oxide (NO) decomposition; numerical modeling; optical emission spectroscopy; pulsed corona discharge (PCD); streamer characteristics;
D O I
10.1109/TPS.2004.823960
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Streamer characteristics have been experimentally and numerically analyzed for pulsed-corona discharge (PCD) and dielectric-barrier discharge (DBD) to rind out how the discharge methods determine them and how they, in turn, affect the generation of radicals in flue gases. Experiments have been performed and compared for decomposition of a nitrogen oxide (NO) using PCD and DBD, and the electric field and average electron energy in the streamer are measured in each discharge by using line ratio of N-2(+) to N-2*. The measured results of electron energy reasonably explain in terms of "G-value" how the measured NO removal efficiencies have come out. The PCD having high electron energy turns out to be more efficient for generating N radicals, whereas the DBD containing relatively low electron energy is more effective for producing 0 radicals. Three-dimensional (3-D) and one-dimensional (I-D) numerical simulations have been carried out to understand the observed streamer dynamics in both the PCD and DBD reactors. The 3-D numerical simulation has successfully illustrated the images of streamer front propagation in a wire-cylinder PCD reactor. In the I-D simulation for the DBD, the recurrence phenomena of streamers have numerically appeared during the rising phase of an ac voltage. Furthermore, these numerical models have properly predicted the electric fields that are comparable with the corresponding average electron energies estimated from the emission spectral measurements for the PCD and DBD.
引用
收藏
页码:18 / 24
页数:7
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