| Issue |
MATEC Web Conf.
Volume 333, 2021
The 18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019)
|
|
|---|---|---|
| Article Number | 03004 | |
| Number of page(s) | 5 | |
| Section | Heat Transfer and Thermal Engineering | |
| DOI | https://doi.org/10.1051/matecconf/202133303004 | |
| Published online | 08 January 2021 | |
Effect of External Magnetic Field on Long DC Arc Characteristics with Rng-shaped Anode
1
Department of chemical engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
2
Clean Technology Co. Ltd., 3209-1 Hineno, Izumisano, Osaka 598-0021, Japan
* Corresponding author: watanabe@chem-eng.kyushu-u.ac.jp
Fluctuation phenomena of plasma jet flow in an innovative long DC arc system with a ring-shaped anode were successfully clarified by a high-speed camera visualization. The long DC arc with long electrode gap distance more than 350 mm has been applied to gas decomposition due to its advantages of long plasma length, resulting in long residence time of treated gas. However, large heat loss at a conventional hemispherical-shaped anode was a critical issue in the long DC arc system. Therefore, the ring-shaped anode was utilized to convert large energy loss at the anode into the plasma jet flow. High-speed camera observation revealed the effect of external magnetic field on the fluctuation phenomena. Plasma jet fluctuates with the frequency of several tens Hz when the magnetic field was applied. These understanding of arc and plasma jet fluctuation enables to improve the capability of long DC arc system.
© The Authors, published by EDP Sciences, 2021
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