접선 분사 연소기 내 암모니아 크래킹 혼합물/공기 비예혼합 화염의 안정화 및 NOx 배출 특성 연구
Flame Stability and Emission Characteristics of Non-Premixed Ammonia Cracking Gas/Air Combustion in a Tangential Injection Burner
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Combustion characteristics of partial cracking ammonia gas were investigated using a tangential injection burner. As the cracking ratio increased, the stable operational regime expanded, leading to the blowout limit of ϕ=0.17. Higher injection velocities increased the wall peak temperature due to augmented heat transfer but lowered temperatures near the injector as the high-temperature reaction zone shifted downstream. NO exhibited peak values at 40-60% cracking ratio, attributed to enhanced radical formation with hydrogen addition. Numerical simulations, employing a perfectly stirred reactor model and a steady laminar flamelet model, demonstrated that these models, based on different assumption of flame structure, accurately reproduce NO levels in low and high cracking ratio conditions, respectively.
Abstract
Combustion characteristics of partial cracking ammonia gas were investigated using a tangential injection burner. As the cracking ratio increased, the stable operational regime expanded, leading to the blowout limit of ϕ=0.17. Higher injection velocities increased the wall peak temperature due to augmented heat transfer but lowered temperatures near the injector as the high-temperature reaction zone shifted downstream. NO exhibited peak values at 40-60% cracking ratio, attributed to enhanced radical formation with hydrogen addition. Numerical simulations, employing a perfectly stirred reactor model and a steady laminar flamelet model, demonstrated that these models, based on different assumption of flame structure, accurately reproduce NO levels in low and high cracking ratio conditions, respectively.
참고문헌 (16)
- A. M. Elbaz, "Review on the recent advances on ammonia combustion from the fundamentals to the applications", Fuel Commun, 10, pp.100053~ (2022)
- H. Lee, "Recent Advances in Ammonia Combustion Technology in Thermal Power Generation System for Carbon Emission Reduction", Energies, 14, pp.5604~ (2021)
- A. Valera-Medina, "Ammonia for power", Prog. Energy Combust. Sci, 69, pp.63~102 (2018)
- T. Lee, "Stability and emission characteristics of ammonia-air flames in a lean-lean fuel staging tangential injection combustor", Combust. Flame, 248, pp.112593~ (2023)
- A. Valera-Medina, "Ammonia–methane combustion in tangential swirl burners for gas turbine power generation", Appl. Energy, 185, pp.1362~1371 (2017)
- E. C. Okafor, "Influence of wall heat loss on the emission characteristics of premixed ammonia-air swirling flames interacting with the combustor wall", Proc. Combust. Inst, 38, pp.5139~5146 (2021)
- A. A. Khateeb, "Stability limits and exhaust NO performances of ammonia-methane-air swirl flames", Exp. Therm. Fluid Sci, 114, pp.110058~ (2020)
- K. Bioche, "Large Eddy Simulation of rich ammonia", hydrogen, Int. J. Hydrogen Energy, pp.2021, 46[DOI]
- G. Vignat, "The suitability of different swirl number definitions for describing swirl flows: Accurate, common and (over-) simplified formulations", Prog. Energy Combust. Sci, 89, pp.100969~ (2022)
- I. Hu, "Calculations of turbulent flames using a PSR microstructural library", Symp. (Int.) on Combust, 26, pp.307~313 (1996)
- Z. Chen, "Simulation of MILD combustion using Perfectly Stirred Reactor model", Proc. Combust. Inst, 36, pp.4279~4286 (2017)
- J. P. H. Sanders, "Flamelet-based modeling of NO formation in turbulent hydrogen jet diffusion flames", Combust. Flame, 111, pp.1~15 (1997)
- A. Stagni, "An experimental, theoretical and kinetic-modeling study of the gas-phase oxidation of ammonia", React. Chem. Eng, 5, pp.696~711 (2020)
- "Cantera 2.6.0, an open-source suite of tools for problems involving chemical kinetics, thermodynamics, and transport processes"[URL]
- B. Mei, "Enhancement of ammonia combustion with partial fuel cracking strategy: Laminar flame propagation and kinetic modeling investigation of NH3", H2, air mixtures up to 10 atm, pp.Combust. Flame, 2021[DOI]
- E. R. Hawkes, "Scalar mixing in direct numerical simulations of temporally evolving plane jet flames with skeletal CO", H2 kinetics, 2007, pp.31, 1633~1640