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수소/공기 화염의 정면 소염에 벽 열전달이 미치는 영향
백민하(Minha Baek),최민준(Minjun Choi),신동혁(Dong-hyuk Shin) 한국연소학회 2023 KOSCOSYMPOSIUM논문집 Vol.2023 No.5
The effect of wall heat transfer on head-on quenching phenomena was investigated to study the thermal quenching characteristics of hydrogen/air flames. Head-on quenching of one-dimensional laminar flames was numerically simulated using OpenFOAM V10. For the chemical kinetics, Li mechanism with 19 reactions and 13 species was used. Adiabatic, isothermal, and conjugate heat transfer wall conditions were considered. The quenching distance on the adiabatic wall was 3 times longer than the conjugate heat transfer wall. In the investigated conditions, the conjugate heat transfer wall shows the similar results as the isothermal wall.
벽-유체 열흡수율이 수소/공기 화염의 정면 소염에 미치는 영향
백민하(Minha Baek),신동혁(Dong-hyuk Shin) 한국연소학회 2023 KOSCOSYMPOSIUM논문집 Vol.2023 No.11
The effect of wall-fluid thermal effusivity on head-on quenching of hydrogen/air flames was investigated. Head-on quenching of one-dimensional laminar flames was numerically simulated using OpenFOAM v10 using Wang-2018 mechanism. Simulations were performed for walls with a total of 30 thermal effusivities, including adiabatic and isothermal walls. The head-on qunching process was observed depending on the wall conditions, and the quenching Peclet number (normalized quenching distance) of hydrogen/air flames with equivalence ratios of 0.8, 1.0 and 1.4 has a constant trend.
김형우(Hyoungwoo Kim),진욱화(Ukhwa Jin),고영건(Younggun Go),최민준(Minjun Choi),구인영(Inyeong Gu),백민하(Minha Baek),김규태(Kyu Tae Kim),신동혁(Dong-hyuk Shin) 한국연소학회 2022 한국연소학회지 Vol.27 No.2
This report surveys recent developments of carbon-neutral gas turbine combustion technology. Since the Paris Climate Agreement in 2019, each country committed a nationally determined contribution (NDC) which identifies key targets to reduce the temperature rise. In order to meet the NDC, each government is pushing hard to reduce greenhouse gas emissions, and using carbon-neutral fuel is a straightforward way to reduce to achieve the goals. As carbon-neutral fuels such as hydrogen or ammonia have different thermodynamic and transport properties, it needs paradigm changes in many related sectors. Gas turbine is one of the sectors, and this report reviews ongoing progress and challenges centered around developing carbon-neutral gas turbine combustion technology.