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Title

Magnus Effect on Arc Driven by Alternating Magnetic Field in Swirling Plasma Gas
Authors

Ryota AKIHO
Organization: Graduate School of Systems Science and Technology, Akita Prefectural University
Koichi TAKEDA
Organization: Graduate School of Systems Science and Technology, Akita Prefectural University
Masaya SUGIMOTO
Organization: Sanei-Kikai Co., Ltd.
Yosuke NOGUCHI
Journal / Anthology

ISIJ International
Year: 2014
Volume: 54
Issue: 4
Page range: 774-780
Description

An arc driven by an alternating magnetic field was investigated theoretically and experimentally in swirling plasma gas flow. The governing equation to ascertain the arc motion was assumed to include not only an electromagnetic force term but also a Magnus force one. The electromagnetic force term derives from interaction between the arc current and the imposed magnetic field. The Magnus force is produced when the rotating gas travels in the surrounding gas. The obtained equation was solved numerically using commercial software (Mathematica). Numerical calculation revealed that the movement of the magnetically driven arc is twisted by the Magnus force. The twist direction depends on that of the swirling motion of the plasma gas. Clockwise-swirling plasma gas produces clockwise twisted arc movement. The amplitude of the oscillatory arc motion decreases concomitantly with increasing swirling strength. The experiment was performed to examine the theoretical predictions. Results from experimental observations showed that the theoretical modeling was reasonable.
Subject

*Engineering > Materials and Metallurgical Engineering
Keywords

transferred arc, magnetic field, swirling gas, electromagnetic force, magnus force


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