Publication details

Time- and space-resolved LIF measurement of the concentration of OH radicals generated by surface barrier discharge emerging from liquid water

Authors

VORÁČ Jan SYNEK Petr DVOŘÁK Pavel HODER Tomáš

Year of publication 2019
Type Article in Periodical
Magazine / Source Plasma Sources Science and Technology
MU Faculty or unit

Faculty of Science

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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