Journal of Advanced Marine Engineering and Technology

  • 제37권8호
  • /
  • Pages.807-815
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  • 2013
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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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1g와 0g에서의 에틸렌 확산화염 내 매연 생성 특성에 관한 수치적 연구

A numerical study on soot formation in ethylene diffusion flames under 1g and 0g

  • Choi, Jae-Hyuk (Division of Marine System engineering, Korea Maritime and Ocean University) ;
  • Park, Sang-Kyun (Department of Power System Engineering, Kunsan National University)
  • 투고 : 2013.06.26
  • 심사 : 2013.09.10
  • 발행 : 2013.11.30
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초록

대기압에서의 층류 에틸렌 확산 화염 내 매연 생성에 대하여 부력의 영향에 대한 보다 나은 이해를 위해 0g와 1g 조건하에서 수치해석을 수행하였다. 수치해석을 위하여 가스상 메커니즘과 열 및 이송특성을 이용하였다. 매연의 생성과 성장 및 산화에 대하여 예측하기 위하여 간단한 매연 모델이 채택되었으며 이 모델은 가스상과 매연의 화학적 상호작용에 고려되었다. 수치 결과로서 보다 두꺼운 확산층과 축방향 속도의 감소로 인해 0g에서의 화염이 1g하의 화염보다 더 넓은 화염을 가진다는 알 수 있었다. 0g에서의 축방향 속도의 감소는 더 긴 체류 시간을 가지게 하고 그 결과로 더 많은 매연 체적분율을 나타나게 한다. 0g 하에서는 화염이 부력으로 인한 불안정성이 없어져 화염의 흔들거림이 사라졌다.

A numerical study on soot formation in a laminar ethylene diffusion flame at atmospheric pressure was conducted to obtain a better understanding of the effects of buoyancy on sooting flames under 0g and 1g using a gas-phase reaction mechanism and thermal and transport properties. A simple model was employed to predict soot formation, growth and oxidation with interactions between the gas phase chemistry and the soot chemistry taken into account. Results showed that the flames in 0g are much wider than that of 1g because of the thicker diffusion layer and reduction in axial velocity. The reduction in the axial velocity in 0g results in longer residence times, and resulting in greatly enhanced soot volume fraction. And, under zero-gravity, due to the lack of a buoyancy-induced instability, flame instability disappears.

키워드

참고문헌

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피인용 문헌

  1. Effects of various densities and velocities on gaseous hydrocarbon fuel on near nozzle flow field under different laminar coflow diffusion flames vol.40, pp.2, 2016, https://doi.org/10.5916/jkosme.2016.40.2.102