Effect of arc current on droplet ejection from tungsten-based electrode in multiphase AC arc

研究成果: ジャーナルへの寄稿記事

抄録

The dynamic behavior of droplet ejection from a tungsten electrode was successfully visualized using a high-speed camera and an appropriate band-pass filter. The effect of arc current on droplet ejection was investigated to understand the electrode erosion mechanism in the multiphase AC arc. The rate of erosion by droplet ejection increased with increasing current. This result was examined on the basis of the time variation in forces on a pending droplet at the electrode tip during the AC cycle. The relationship among electromagnetic force, surface tension, and ion pressure on the molten tip during the cathodic period is crucial for controling droplet ejection. The molten tip becomes hemispherical forming the pending droplet with an increase in the instantaneous value of arc current during the AC cycle. The pending droplet detaches from the electrode surface when electromagnetic force becomes the dominant force. Consequently, a higher rate of erosion by droplet ejection with a higher arc current resulted from a stronger electromagnetic force.

元の言語英語
記事番号056101
ジャーナルJapanese Journal of Applied Physics
56
発行部数5
DOI
出版物ステータス出版済み - 5 1 2017

Fingerprint

ejection
Tungsten
alternating current
tungsten
arcs
Electrodes
electrodes
erosion
electromagnetism
Erosion
cycles
high speed cameras
Molten materials
bandpass filters
interfacial tension
High speed cameras
Bandpass filters
Surface tension
ions
Ions

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

これを引用

Effect of arc current on droplet ejection from tungsten-based electrode in multiphase AC arc. / Hashizume, Taro; Tanaka, Manabu; Watanabe, Takayuki.

:: Japanese Journal of Applied Physics, 巻 56, 番号 5, 056101, 01.05.2017.

研究成果: ジャーナルへの寄稿記事

@article{e765cf942739472d9b4150d5089262a4,
title = "Effect of arc current on droplet ejection from tungsten-based electrode in multiphase AC arc",
abstract = "The dynamic behavior of droplet ejection from a tungsten electrode was successfully visualized using a high-speed camera and an appropriate band-pass filter. The effect of arc current on droplet ejection was investigated to understand the electrode erosion mechanism in the multiphase AC arc. The rate of erosion by droplet ejection increased with increasing current. This result was examined on the basis of the time variation in forces on a pending droplet at the electrode tip during the AC cycle. The relationship among electromagnetic force, surface tension, and ion pressure on the molten tip during the cathodic period is crucial for controling droplet ejection. The molten tip becomes hemispherical forming the pending droplet with an increase in the instantaneous value of arc current during the AC cycle. The pending droplet detaches from the electrode surface when electromagnetic force becomes the dominant force. Consequently, a higher rate of erosion by droplet ejection with a higher arc current resulted from a stronger electromagnetic force.",
author = "Taro Hashizume and Manabu Tanaka and Takayuki Watanabe",
year = "2017",
month = "5",
day = "1",
doi = "10.7567/JJAP.56.056101",
language = "English",
volume = "56",
journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",
issn = "0021-4922",
publisher = "Institute of Physics",
number = "5",

}

TY - JOUR

T1 - Effect of arc current on droplet ejection from tungsten-based electrode in multiphase AC arc

AU - Hashizume, Taro

AU - Tanaka, Manabu

AU - Watanabe, Takayuki

PY - 2017/5/1

Y1 - 2017/5/1

N2 - The dynamic behavior of droplet ejection from a tungsten electrode was successfully visualized using a high-speed camera and an appropriate band-pass filter. The effect of arc current on droplet ejection was investigated to understand the electrode erosion mechanism in the multiphase AC arc. The rate of erosion by droplet ejection increased with increasing current. This result was examined on the basis of the time variation in forces on a pending droplet at the electrode tip during the AC cycle. The relationship among electromagnetic force, surface tension, and ion pressure on the molten tip during the cathodic period is crucial for controling droplet ejection. The molten tip becomes hemispherical forming the pending droplet with an increase in the instantaneous value of arc current during the AC cycle. The pending droplet detaches from the electrode surface when electromagnetic force becomes the dominant force. Consequently, a higher rate of erosion by droplet ejection with a higher arc current resulted from a stronger electromagnetic force.

AB - The dynamic behavior of droplet ejection from a tungsten electrode was successfully visualized using a high-speed camera and an appropriate band-pass filter. The effect of arc current on droplet ejection was investigated to understand the electrode erosion mechanism in the multiphase AC arc. The rate of erosion by droplet ejection increased with increasing current. This result was examined on the basis of the time variation in forces on a pending droplet at the electrode tip during the AC cycle. The relationship among electromagnetic force, surface tension, and ion pressure on the molten tip during the cathodic period is crucial for controling droplet ejection. The molten tip becomes hemispherical forming the pending droplet with an increase in the instantaneous value of arc current during the AC cycle. The pending droplet detaches from the electrode surface when electromagnetic force becomes the dominant force. Consequently, a higher rate of erosion by droplet ejection with a higher arc current resulted from a stronger electromagnetic force.

UR - http://www.scopus.com/inward/record.url?scp=85018412503&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85018412503&partnerID=8YFLogxK

U2 - 10.7567/JJAP.56.056101

DO - 10.7567/JJAP.56.056101

M3 - Article

VL - 56

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 5

M1 - 056101

ER -