Characteristics of atmospheric Ar/NH3 DBD and its comparison with He/N-2 DBD
Characteristics of atmospheric Ar/NH3 DBD and its comparison with He/N-2 DBD
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大气Ar/NH3 DBD的特性及其与He/N-2 DBD的比较
DOI：
10.1088/1361-6463/aabeaa
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Zhang Guan Jun
中科院分区：
文献类型：
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作者：
Yao Congwei;Chen Sile;Wang Shuai;Chang Zhengshi;Sun Anbang;Mu Haibao;Zhang Guan Jun
研究了Ar/NH 3 DBD（介质阻挡放电）的放电模式和光电特性，讨论了潘宁电离和附着反应影响下放电的稳定性。放电模式有稳定均匀辉光放电、不稳定辉光放电和不稳定柱状放电三种。放电不稳定性，包括不均匀放电和放电通道分裂，在NH 3 体积分数低(<0.10%)或高(>0.35%)时发生，这被认为分别是由不够强的潘宁效应或强附着反应引起的。 NH 3 的附着反应也会导致Ar/NH 3 DBD 的发射强度变弱，特别是关于OH (A 2 Σ+) 的发射。还比较了Ar/NH 3 和He/N 2 DBD。在He/N 2 DBD中，随着N 2 体积分数的增加，OH (A 2 Σ+)的发射强度变化较小，这可能归因于缺乏附着反应。与Ar/NH 3 DBD相比，He/N 2 DBD的单个放电通道更窄，但放电面积更宽，这分别是由于He/N 2 较高的汤森电离系数非线性和He/N 2 中不存在附着反应所致。最后建立了Ar/NH 3 DBD的一维流体模型来验证实验结果的解释。
The discharge mode and photoelectric characteristics of Ar/NH 3 DBD (dielectric barrier discharge) are studied to discuss the stability of the discharge under the influence of Penning ionization and attachment reaction. There are three discharge modes, including stable uniform glow discharge, unstable glow discharge and unstable columnar discharge. Discharge instability, including nonuniform discharge and discharge channel split, occurs under low (< 0.10%) or high (> 0.35%) volume fractions of NH 3, which are understood to be caused by an insufficiently strong Penning effect or a strong attachment reaction, respectively. The attachment reaction of NH 3 can also lead to a weaker emission intensity for Ar/NH 3 DBD, in particular regarding the emission of OH (A 2 Σ+). Ar/NH 3 and He/N 2 DBDs are also compared. In He/N 2 DBD, the emission intensity of OH (A 2 Σ+) changes less with increasing N 2 volume fraction, which may be attributed to the lack of attachment reaction. Compared with Ar/NH 3 DBD, the single discharge channel in He/N 2 DBD is narrower, but the discharge area is wider, which should be induced by the higher Townsend ionization coefficient nonlinearity of He/N 2 and the absence of attachment reaction in He/N 2, respectively. In the end, a one-dimensional fluid model of Ar/NH 3 DBD is built to verify the explanation of experimental results.