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2020 Vol.25, Issue 4 Preview Page

Research Article

Effects of Insulation Thickness on Flame Spread over Electrical Copper Wire with Applied AC Electric Fields

AC 전기장이 인가된 구리 전선을 통해 전파하는 화염에 대해 피복재의 두께에 따른 화염 거동에 대한 실험적 연구

Min Sung Kang1
Chun Sang Yoo1
Jeong Park2
Suk Ho Chung3
Oh Boong Kwon2*
강 민성1
유 춘상1
박 정2
정 석호3
권 오붕2*
1Department of Mechanical Engineering, Ulsan National Institute of Science and Technology
2Department of Mechanical Engineering, Pukyong National University
3Clean Combustion Research Center, King Abdullah University of Science and Technology
1울산과학기술원 기계공학과
2부경대학교 기계공학과
3CCRC, KAUST
*obkwon@pknu.ac.kr
December 2020. pp. 19-25
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Abstract

Effects of insulation thickness on flame spread over electrical copper wires with applied AC electric fields were experimentally investigated. The AC volrage and frequency varied in ranges of 0-5 kV and 10-1000 Hz, respectively. A one electrode configuration was used such that the electric potential was applied to one wire end and thus the infinite ambience could be a ground. The results showed that the flame shape and the tilting direction were significantly influnced by applied voltage and frequency. The flame spread rate decreased in an increase of insulation thickness as well as varied sensitively with applied votage and frequency. Additionally, the molten polyethylene (PE) experienced various dynamic behaviors such as dripping of molten PE, electrospray, di-electro-phoresis, and rotation of molten PE, essentially affecting the flame spread rate. These complicated phenomena were systematically analyzed and discussed.

Keywords
Electric field
Electrospray
Di-electrophoresis
Dripping of molten PE
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Information
  • Publisher :The Korean Society Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of The Korean Society Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 25
  • No :4
  • Pages :19-25
  • Received Date :2020. 11. 11
  • Revised Date :2020. 11. 24
  • Accepted Date : 2020. 11. 24
  • DOI :https://doi.org/10.15231/jksc.2020.25.4.019
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