수소 혼소 천연가스의 속도변동에 따른 연소특성 해석에 대한 수치해석적 연구
A Numerical Study on Combustion Characteristics according to Velocity Fluctuation in a H2 Enriched Natural Gas
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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.
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.
참고문헌 (18)
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