대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제35권3호
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  • Pages.321-330
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  • 2011
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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폴리에틸렌 피복전선 화염의 전파에 영향을 미치는 직류전기장의 인가 효과에 관한 실험적 연구

Effect of Applied DC Electric Fields in Flame Spread over Polyethylene-Coated Electrical Wire

  • Jin, Young-Kyu (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.) ;
  • Kim, Min-Kuk (Clean Combustion Research Center, King Abdullah University of Science and Technology.) ;
  • Park, Jeong (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.) ;
  • Chung, Suk-Ho (Clean Combustion Research Center, King Abdullah University of Science and Technology.) ;
  • Yun, Jin-Han (Environmental & Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Keel, Sang-In (Environmental & Energy Systems Research Division, Korea Institute of Machinery and Materials)
  • 투고 : 2010.11.30
  • 심사 : 2010.12.22
  • 발행 : 2011.03.01
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초록

본 연구는 전선화염의 전파특성에 직류전기장이 미치는 영향에 대한 실험적 연구이다. 화염전파는 은 0에서 ${\pm}7kV$ 범위의 음극과 양극의 전기장을 인가하여 실험되어졌다. 본 연구를 통해 앞선 전선화염 전파에 영향을 미치는 교류전기장 효과에 관한 연구결과와 비교하여 관찰된 다양한 화염 모양 변화의 원인을 알아보고, 화염 전파 속도의 가속특성에 대해서도 논의하고자 한다. 직류전기장의 인가가 전선화염에 미치는 영향은 크지 않지만 이온풍 효과에 따른 미미한 영향은 존재하며, 이것은 온도 균형 메커니즘과 연료 증발기체 분사 효과로 설명 될 수 있다.

We experimentally investigated the effect of applied DC electric fields on the flame spread over polyethylene-coated electrical wire. The flame-spread rates over electrical wire with negative and positive DC electric fields from 0 to ${\pm}7$ kV were measured and analyzed. We compared the results for DC electric fields with previous results for AC electric fields. We explored whether or not various flame shapes could be obtained with DC electric fields and the main reason for the flame-spread acceleration, particularly at the end of the electrical wire, for AC electric fields. We found that DC electric fields do not significantly affect the flame-spread rates. However, the flame shape is mildly altered by the ionic wind effect even for DC electric fields. The flame-spread rate is relevant to the flame shape and the slanted direction in spite of the mild impact. A possible explanation for the flame spread is given by a thermal-balance mechanism and fuel-vapor jet.

키워드

참고문헌

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피인용 문헌

  1. Experimental Study on the Flame Spread Characteristics under Reduced Atmospheric Pressures and Elevated Oxygen Concentrations vol.30, pp.6, 2016, https://doi.org/10.7731/KIFSE.2016.30.6.078