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2024 Vol.29, Issue 4 Preview Page

Research Article

A Numerical Study on Combustion Characteristics according to Velocity Fluctuation in a H2 Enriched Natural Gas

수소 혼소 천연가스의 속도변동에 따른 연소특성 해석에 대한 수치해석적 연구

Tae-Kyun Oh1†
오 태균1†
1Department of Mechanical Engineering, Dongyang Mirae University
1동양미래대학교 기계공학과
*Corresponding Author
31 December 2024. pp. 99-107
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Abstract

Thermal power generation accounts for more than 60% of domestic electricity production and the development of gas turbines using LNG mixed with hydrogen is actively progressing as a transition fuel to hydrogen and ammonia, the ultimate carbon-free fuel. In this study, for a fuel that is mixed with 30% hydrogen (H2) in natural gas, the unsteady temperature evolution of the premixed flame, ignition delay time, and the tendency of nitrogen oxides to be discharged were examined through numerical calculation. To this end, the combustion characteristics were examined by giving the supplied velocity fluctuation at nozzle exit through frequency change (0~2000 Hz). When the frequency was 500 Hz or higher, it was confirmed that the ignition delay time rapidly increased as the frequency increased. Ignition no longer occurred when the frequency reached 2000 Hz and it can be considered that no ignition is mainly due to too much convective heat loss in flame.

Keywords
Velocity fluctuation
Nozzle exit
Nitrogen oxides
Ignition delay time
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Information
  • Publisher :The Korean Society of Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of the Korean Society of Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 29
  • No :4
  • Pages :99-107
  • Received Date : 2024-11-26
  • Revised Date : 2024-12-11
  • Accepted Date : 2024-12-11
  • DOI :https://doi.org/10.15231/jksc.2024.29.4.099
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