期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 53, 期 42, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ab98c3
关键词
streamer discharge; OH radical; laser-induced fluorescence; decay rate; simulation
资金
- JSPS KAKENHI [18K18846, 19H02122]
- Grants-in-Aid for Scientific Research [18K18846, 19H02122] Funding Source: KAKEN
In this study, the effect of oxygen (O-2) concentration in the range of 0.000 1% (= 1 ppm) to 20% on the decay of hydroxyl (OH) density after pulsed streamer discharge is examined in a humid nitrogen-oxygen mixture under atmospheric pressure. The decay of OH density was measured using laser-induced fluorescence and compared with one-dimensional postdischarge simulations. The simulation results are consistent with the measured decay of OH density for all O-2 concentrations. Essentially, the OH decay was double exponential, consisting of initial rapid decay fort < 0.1 ms and subsequent slow decay fort > 1 ms, wheretrepresents the postdischarge time. In the slow decay phase, O-2 change in the order of 10 ppm markedly affected the OH decay rate when O-2 < 100 ppm. The sensitive effect of the small amount of O(2)can be attributed to the reaction, H+O-2+M -> HO2+M OH+OH. Other production and loss processes of OH in the postdischarge phase were also examined.
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