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- Title
Spatial-frequency-resolved schlieren sensor for turbulence visualization in arc discharge.
- Authors
Inada, Yuki; Kikuchi, Ryo; Hirano, Yuichi; Maede, Yusuke; Tanaka, Yasunori; Nakano, Yusuke; Shigeta, Masaya; Fujino, Takayasu; Kumada, Akiko
- Abstract
A spatial-frequency-resolved Schlieren photography was developed for the temporally-sequential visualization of the size-selected, multi-directional turbulent structures induced by the arc discharge in a model type gas circuit breaker. The Schlieren-based method was applied to the atmospheric-pressure DC 55-A arc discharge under gas blasting of 100%CO2, 90%CO210%C2F6 or 80%CO220%C2F6, where C2F6 was used as a substitute additive of commercially available polyatomic molecules. The visualization results clearly demonstrated that strong non-reproducible turbulence existed only for the C2F6-blended CO2 gases. The turbulence size was smaller with increasing the radial distance from the arc. The arc-discharge-induced turbulence showed circular structures in 1–5 mm diameters, which was peculiar to the C2F6-blended CO2 gases. The turbulence existence realizes high interruption performance of gas circuit breakers, which provided a new aspect for the search on the SF6-alternative gases.
- Subjects
TURBULENCE; GLOW discharges; ELECTRIC arc; POLYATOMIC molecules; ELECTRIC discharges; PLASMA diagnostics
- Publication
Plasma Chemistry & Plasma Processing, 2024, Vol 44, Issue 3, p1203
- ISSN
0272-4324
- Publication type
Article
- DOI
10.1007/s11090-023-10415-x