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

The Korean Society of Mechanical Engineers (대한기계학회)
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Characteristics of Non-premixed Synthetic Natural Gas-Air Flame with Variation in Fuel Compositions

합성천연가스의 조성변화에 따른 확산화염 연소특성

  • Oh, Jeongseog (Energy Efficiency Department, Korea Institute of Energy Research) ;
  • Dong, Sangeun (Energy Efficiency Department, Korea Institute of Energy Research) ;
  • Yang, Jebok (Energy Efficiency Department, Korea Institute of Energy Research)
  • 오정석 (한국에너지기술연구원 에너지효율연구단) ;
  • 동상근 (한국에너지기술연구원 에너지효율연구단) ;
  • 양제복 (한국에너지기술연구원 에너지효율연구단)
  • Received : 2013.04.03
  • Accepted : 2013.07.23
  • Published : 2013.09.01
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Abstract

The combustion characteristics with variations in synthetic natural gas (SNG) compositions were studied in a lab-scale combustor. The objective of the current study is to investigate the flame stabilization, flame structure, and spectrometry in a non-premixed SNG flame with varying fuel compositions. For the analysis of light emission in SNG flames, we used a spectrometer. As experimental conditions, the fuel jet velocity at the nozzle exit $u_F$ was varied from 5 to 40 m/s and the coaxial air velocity $u_A$ was varies from 0 to 0.43 m/s. The experiments showed that the flame stability increased with the hydrogen component in SNG.

석탄을 개질한 합성천연가스의 조성에 변화가 있을 경우 화염의 연소특성에 대하여 연구하였다. 본 연구의 목적은 동축 공기 합성천연가스 확산화염을 구현하여 연료조성에 따른 화염안정성과 화염구조, 분광특성, 온도분포를 실험적인 방법으로 연구하는 것이다. 각 화염의 분광특성을 관찰하기 위하여 분광기를 사용하였으며 연소장 내 온도측정을 위하여 K 형 열전대를 사용하였다. 연료 분사기 출구속도는 $u_F$ =5~40 m/s 사이에서 조절하였고 공기 분사기 출구속도는 $u_A$ =0~0.43 m/s 사이에서 조절하였다. 연소 동특성에 대한 실험을 통해 합성천연가스에 수소 성분이 증가하면 화염안정화 영역이 증가하고 부상화염 높이가 낮아져 화염길이가 짧아지는 것을 알 수 있었다.

Keywords

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