Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Combustion Characteristics with Hydrogen Contents of SNG Fuel in Low-Swirl Combustor

저선회 연소기에서 합성천연가스(SNG) 연료의 수소함량에 따른 연소 특성 연구

  • JEONG, HWANGHUI (Department of Aerospace Engineering, Sunchon National University) ;
  • KANG, KIJOONG (School of Mechanical Engineering, Pusan National University) ;
  • LEE, KEEMAN (School of Aerospace and Mechanical Engineering)
  • 정황희 (순천대학교 대학원 우주항공공학과) ;
  • 강기중 (부산대학교 기계공학부) ;
  • 이기만 (순천대학교 기계우주항공공학부)
  • Received : 2017.03.20
  • Accepted : 2017.04.30
  • Published : 2017.04.30
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Abstract

This paper describes experimental results on combustion characteristics with hydrogen contents of synthetic natural gas (SNG) in low swirl combustor. To investigate the effect of hydrogen contents for premixed SNG flame, stability map, CH chemiluminescence images, flame spectrum analysis and emission performances were measured. In the results, as the hydrogen content was increased, the lean flammable limit was expanded and the flame length was decreased. The hydrogen contents affected the flame liftoff height, and it has different tendency according to the equivalence ratio and flame shape. The change of height and length of flame according to hydrogen contents is caused by the fast burning velocity of hydrogen, which can be confirmed by GRI 3.0 reaction mechanism in PREMIX code. The intensity of $OH^*$, $CH^*$ and $C_2^*$ was confirmed by spectrum analysis of flame. As a result, the $CH^*$ intensity was not significantly different according to hydrogen content. The increase of hydrogen contents influenced positively CO and NOx emission performances.

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References

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