Time- and space-resolved LIF measurement of the concentration of OH radicals generated by surface barrier discharge emerging from liquid water
| Authors | |
|---|---|
| Year of publication | 2019 |
| Type | Article in Periodical |
| Magazine / Source | Plasma Sources Science and Technology |
| MU Faculty or unit | |
| Citation | |
| Web | https://doi.org/10.1088/1361-6595/ab3e0d |
| Doi | http://dx.doi.org/10.1088/1361-6595/ab3e0d |
| Keywords | hydroxyl radical; laser-induced fluorescence; liquid water; streamer discharge; atmospheric pressure; argon; mapping |
| Description | The concentration of OH radicals has been mapped in three-dimensions by scanning planar laser-induced fluorescence (LIF) in the vicinity of surface barrier discharge emerging from liquid water and propagating along a fused silica dielectric tube in argon. The concentration peaked in the region of active discharges near the water level at the value of 1.5e21 m-3 and decreased with the distance on a characteristic length of ~0.4 mm, which suggests that the OH transport is dominated by diffusion. The OH production increases with power input (P) until it saturates for P > 0.75 W. It has been observed that the repetitive discharge appearance at preferred locations can be changed to stochastic (i.e. macroscopically homogeneous) by increasing the thickness of deionized water covering the earthed electrode. |
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