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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimer: 1093-3611
ISSN En ligne: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v11.i3.70
pages 393-403

OSCILLATORY MOTION OF MAGNETICALLY DRIVEN ARC IN NON-UNIFORM FIELD

I. Kuno
Department of Machine Intelligence and System Engineering, Akita Prefectural University, 84-4 Ebinokuchi Tsuchiya, Yuri-Honjo, Akita, 015-0055, Japan
T. Yamamoto
Department of Machine Intelligence and System Engineering, Akita Prefectural University, 84-4 Ebinokuchi Tsuchiya, Yuri-Honjo, Akita, 015-0055, Japan
Koichi Takeda
Department of Machine Intelligence and System Engineering, Akita Prefectural University, 84-4 Ebinokuchi Tsuchiya, Yuri-Honjo, Akita, 015-0055, Japan
Takehiko Toh
Environment & Process Development Center, Nippon Steel Corp., 20-1, Shintomi, Futtu, Chiba, 293-8511, Japan
Jim Tanaka
Environment & Process Development Center, Nippon Steel Corp., 20-1, Shintomi, Futtu, Chiba, 293-8511, Japan
Ken-ichi Yamamoto
Environment & Process Development Center, Nippon Steel Corp., 20-1, Shintomi, Futtu, Chiba, 293-8511, Japan
Sunao Takeuchi
Environment & Process Development Center, Nippon Steel Corp., 20-1, Shintomi, Futtu, Chiba, 293-8511, Japan

RÉSUMÉ

The authors have developed a wide heat source by imposing an alternating magnetic field perpendicularly to a transferred arc. In this paper, the deformation of the arc root on the anode is examined theoretically. In a uniform magnetic field, the arc root area increases with the increased arc displacement from the center. The increase of the area decreases the heat flux density. The application of the non-uniform magnetic field is discussed to prevent the decrease of the heat flux density. If the reversed magnetic field is applied to the arc near the anode, the incident angle of the arc to the anode becomes large (close to π/2 ). In other words, the application of such a non-uniform field might suppress the increase of the area of the arc root. Consequently, it might suppress the decrease of the heat flux density. Theoretical prediction of the effect of the non-uniform field is confirmed experimentally.