암모니아 전소 버너 설계를 위한 난류 비예혼합 연소 해석 모델의 평가
Evaluation of a Turbulent Non-premixed Combustion Model for the Design of an Ammonia-fueled Burner
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Ammonia has emerged as a carbon-free fuel to replace conventional fossil fuels for CO2 emission reduction. However, it has a low flame speed, low flame temperature, and potential for high NOx emissions compared to conventional fuels. Computation fluid dynamics(CFD) can play a key role in developing industrial ammonia-fueled burners to achieve stable ignition and suppress NOx-forming reactions. However, the large computational domain restricts the use of advanced models such as eddy dissipation concept(EDC) for consideration of the detailed reaction mechanism with turbulence-chemistry interaction. In this study, the performance of the steady and unsteady diffusion flamelet models(S/UDFM) for ammonia combustion was evaluated in a 80 kWth non-premixed swirl burner. Although S/UDFM overestimated N2O emissions, it effectively captured NOx and ammonia emission trends similar to that of EDC under different combustion conditions. When compared to experiments, S/UDFM predicted NO and NH3 emission trend effectively, making it a computationally efficient reaction model for CFD applications to design evaluation of industrial ammonia combustion systems.
Abstract
Ammonia has emerged as a carbon-free fuel to replace conventional fossil fuels for CO2 emission reduction. However, it has a low flame speed, low flame temperature, and potential for high NOx emissions compared to conventional fuels. Computation fluid dynamics(CFD) can play a key role in developing industrial ammonia-fueled burners to achieve stable ignition and suppress NOx-forming reactions. However, the large computational domain restricts the use of advanced models such as eddy dissipation concept(EDC) for consideration of the detailed reaction mechanism with turbulence-chemistry interaction. In this study, the performance of the steady and unsteady diffusion flamelet models(S/UDFM) for ammonia combustion was evaluated in a 80 kWth non-premixed swirl burner. Although S/UDFM overestimated N2O emissions, it effectively captured NOx and ammonia emission trends similar to that of EDC under different combustion conditions. When compared to experiments, S/UDFM predicted NO and NH3 emission trend effectively, making it a computationally efficient reaction model for CFD applications to design evaluation of industrial ammonia combustion systems.
참고문헌 (20)
- H. Lee, "The needs for R&D of ammonia combustion technology for carbon neutrality-Part Ⅰ background and economic feasibility of expanding the supply of fuel ammonia", J. Korean Soc. Combust, 26(1), pp.59~83 (2021)
- M. Pagliaro, "Solar hydrogen: Fuel of the future" (2012), Royal Society of Chemistry
- W. Zhijian, "Ammonia as an effective hydrogen carrier and a clean fuel for solid oxide fuel cells", Energy Convers. Manag, 228, pp.113729~ (2021)
- J. A. Miller, "Mechanism and modeling of nitrogen chemistry in combustion", Prog. Energy Combust, 15, pp.287~338 (1989)
- E. C. Okafor, "Experimental and numerical study of the laminar burning velocity of CH4–NH3–air premixed flames", Combust. Flame, 187, pp.185~198 (2018)
- A. A. Konnov, "Implementation of the NCN pathway of prompt-NO formation in the detailed reaction mechanism", Combust. Flame, 156, pp.2093~2105 (2009)
- H. Nakamura, "Generating simplified ammonia reaction model using genetic algorithm and its integration into numerical combustion simulation of 1 MW test facility", Appl. Energy Combust. Sci, 15, pp.100187~ (2023)
- M. J. Lee, "Ammonia combustion characteristics and technology development trend", J. Kor. Inst. Gas, 27(3), pp.11~18 (2023)
- K. D. K. A. Somarathne, "Modelling of ammonia", air non-premixed turbulent swirling flames in a gas turbine-like combustor at various pressures, 2018, pp.22(5), 973~997
- T. Chae, "An experimental study on optimization of ammonia co-firing in an 80kWth pulverized coal combustion system", Fuel, 380, pp.132740~ (2025)
- S. Hwang, "An experimental study on NOx emission characteristics using 100 kWth ammonia combustion burner", 68th KOSCO symposium, pp.66~69 (2024)
- F. R. Menter, "Two-equation Eddy-viscosity Turbulence Models for Engineering Applications", AIAA J, 32, pp.1598~1605 (1994)
- E. H. Chui, "Computation of radiant heat transfer on a nonorthogonal mesh using the finite-volume method", Numer. Heat Transf. Part B, 23, pp.269~288 (1993)
- T. F. Smith, "Evaluation of coefficients for the weighted sum of gray gases model", J. Heat Transf, 104, pp.602~608 (1982)
- B.F. Magnussen, "On the structure of turbulence and a generalized Eddy dissipation concept for chemical reaction in turbulent flow", 19th AIAA Aerospace Science Meeting, pp.1~12 (1981)
- N. Peters, "Laminar diffusion flamelet models in non premixed combustion", Prog. Energy Combust. Sci, pp.319~339 (1984)
- H. Barths, "Simulation of pollutant formation in a gas turbine combustor using unsteady flamelets", 27th Symp. (Int.) Combust, pp.1841~1847 (1998)
- G. J. Gotama, "Measurement of the laminar burning velocity and kinetics study of the importance of the hydrogen recovery mechanism of ammonia", hydrogen, Combust. Flame, pp.2022, 236[DOI]
- X. Han, "Experimental and kinetic modeling study of laminar burning velocities of NH3", syngas, Combust. Flame, pp.2020, 213[DOI]
- Climate Change 2023: Synthesis Report, Summary for Policymakers, "IPCC", IPCC, ~ (2023)