H2/CO 합성가스의 비예혼합 난류 제트화염에서 화염 길이와 EINOx 스케일링
Flame Length and EINOx Scaling of Syngas H2/CO Turbulent Non-premixed Jet Flames
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
The flame lengths and NOx emission characteristics of syngas H2/CO turbulent non-premixed jet flames were investigated. The flame length which is the main parameter governs NOx emission was studied for various syngas compositions. The flame length was compared with previous correlation between Froude number and flame height and it shows that they have good agreements. It was confirmed that the turbulent jet flames herein investigated are in the region of buoyancy-momentum transition. NOx emission was reduced with increased Reynolds number and CO contents in syngas fuel and with decreased fuel nozzle diameter which is attributed by decreased flame residence time. Previous EINOx scaling based on flame residence time of Lf3/(df2Uf) satisfies only the jet flame in momentum-dominated region, not buoyancy-momentum transition region. The simplified flame residence time (Lf/Uf) was adopted in modified EINOx scaling. The modified scaling satisfies the jet flames not only in momentum-dominated region but in buoyancy-momentum transition region. The scaling is also satisfied with H2/CO syngas jet flames
Abstract
The flame lengths and NOx emission characteristics of syngas H2/CO turbulent non-premixed jet flames were investigated. The flame length which is the main parameter governs NOx emission was studied for various syngas compositions. The flame length was compared with previous correlation between Froude number and flame height and it shows that they have good agreements. It was confirmed that the turbulent jet flames herein investigated are in the region of buoyancy-momentum transition. NOx emission was reduced with increased Reynolds number and CO contents in syngas fuel and with decreased fuel nozzle diameter which is attributed by decreased flame residence time. Previous EINOx scaling based on flame residence time of Lf3/(df2Uf) satisfies only the jet flame in momentum-dominated region, not buoyancy-momentum transition region. The simplified flame residence time (Lf/Uf) was adopted in modified EINOx scaling. The modified scaling satisfies the jet flames not only in momentum-dominated region but in buoyancy-momentum transition region. The scaling is also satisfied with H2/CO syngas jet flames
참고문헌 (17)
- IGCC gas turbines for refinery applications, "R. M. Jones", GE Power Systems, ~ (2003)
- A. K. Das, "Laminar flame speeds of moist syngas mixtures", Combust. Flame, 158(2), pp.345~353 (2011)
- N. Bouvet, "Experimental studies of the fundamental flame speeds of syngas (H2", CO), Proc. Combust. Inst., pp.2011, 33(1)[DOI]
- F. L. Dryer, "Ignition of syngas", air and hydrogen, Combust. Flame, pp.2008, 152(1)[DOI]
- S. M. Walton, "An experimental investigation of the ignition properties of hydrogen and carbon monoxide mixtures for syngas turbine applications", Proc. Combust. Inst., 31(2), pp.3147~3154 (2007)
- M. Chaos, "Syngas combustion kinetics and applications", Combust. Sci. Technol., 180(6), pp.1053~1096 (2008)
- P. Saxena, "Testing a small detailed chemical-kinetic mechanism for the combustion of hydrogen and carbon monoxide", Combust. Flame, 145(1), pp.316~323 (2006)
- J. Lee, "Effects of fuel-side nitrogen dilution on structure and NOx formation of turbulent syngas non-premixed jet flames", Energy Fuels, 26, pp.3304~3315 (2012)
- D. E. Giles, "NOx emission characteristics of counterflow syngas diffusion flames with airstream dilution", Fuel, 85, pp.1729~1742 (2006)
- N. Peters, "Structure and similarity of nitric oxide production in turbulent diffusion flames", Proc. Combust. Inst., 18, pp.33~42 (1981)
- S. Som, "A numerical and experimental study of counterflow syngas flames at different pressures", Fuel, 87, pp.319~334 (2008)
- G. A. Lavoie, "A scaling study of NO formation in turbulent diffusion flames of hydrogen burning in air", Combust. Sci. Technol., 8, pp.215~224 (1973)
- R. -H. Chen, "Nitric oxide levels of jet diffusion flames: Effects of coaxial air and other mixing parameters", Proc. Combust. Inst., 23, pp.281~288 (1990)
- R. Gabriel, "Effects of fuel Lewis number on nitric oxide emission of diluted H2 turbulent jet diffusion flames", Combust. Flame, 121, pp.525~534 (2000)
- J. F. Driscoll, "Nitric oxide levels of turbulent jet diffusion flames: Effects of residence time and damkohler number", Combust. Flame, 88(1), pp.37~49 (1992)
- M. A. Delichatsios, "Transition from momentum to buoyancy-controlled turbulent jet diffusion flames and flame height relationships", Combust. Flame, 92, pp.349~364 (1993)
- G. T. Kalghatgi, "Personal communication-Flame height raw data", The 9th International Colloquium on Gas Dynamics of Explosion and Reactive Systems (1983)