Journal of Advanced Marine Engineering and Technology

  • 제35권2호
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  • Pages.204-215
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  • 2011
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  • 2234-7925(pISSN)
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  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
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층류제트 화염의 노즐직경에 따른 안정화 메커니즘과 화염형상에 관한 연구

A Study on the Flame Configuration and Flame Stability Mechanism with a Nozzle Diameter of Laminar Lifted Jet Flame

  • 김태권 (계명대학교 기계자동차공학부) ;
  • 김경호 (계명대학교 물리학과) ;
  • 하지수 (계명대학교 에너지환경과학과)
  • 투고 : 2010.12.16
  • 심사 : 2011.02.08
  • 발행 : 2011.03.31
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⟨ 이전 논문 다음 논문 ⟩

초록

화염 안정성은 층류부상화염의 중요한 메커니즘 중 하나이며 화염전파속도는 화염안정화를 평가하기 위한 척도가 된다. Bilger는 삼지점을 기준으로 혼합분율과 화염의 형상에 관계된 삼지화염의 화염 전파속도 및 안정화 메키니즘을 제시하였다. 그러나 동축류 작은 노즐을 이용한 실험과 수치해석에서는 화염이 형성되고 소화되는 전 과정을 상세히 관찰 할 수는 없었다. 본 논문에서는 노즐 직경에 따른 화염거동과 화염 형상 및 안정화 메커니즘에 대하여 세분화하였다. 본 논문의 결과로 노즐에 따른 삼지화염의 거동과 삼지화염전파, 화염면 전파 및 평면화염의 존재 등을 구분하였다. 그리고 삼지화염전파 거동에 있어서 열린삼지화염전파 및 닫힌 삼지화염전파 거동에 대해 구분하였다.

Flame stability is the one of the main mechanism of laminar lifted flame and flame propagation velocity becomes a yardstick to measure the flame stability. Bilge has presented the flame propagation velocity of the triple flame and the flame stability mechanism related the flame configuration and mixture fraction. However, there was not able to observe all process of flame ignition and extinction for small nozzle diameter. In this paper, we have subdivided the flame configuration and stability mechanism and classified the flame behavior with a nozzle diameter. Also we have subdivided the 'triple flame propagation opened' and the 'triple flame propagation closed' from the triple flame propagation of triple flame criterion.

키워드

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