Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
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Effects of H2O Addition in Downstream Interaction between H2-Air and CO-Air Premixed Flames

H2-공기와 CO-공기 예혼합 화염 사이의 후류상호작용에 있어서 H2O 첨가 효과

  • Park, Jeong (Department of Mechanical Engineering, Pukyong National University) ;
  • Kwon, Oh Boong (Department of Mechanical Engineering, Pukyong National University) ;
  • Kim, Tae Hyung (Power Generation Research Laboratory, Korea Electric Power Research Institute) ;
  • Park, Jong Ho (Department of Mechanical Engineering, Chungnam Natioanl University)
  • 박정 (부경대학교 기계공학과) ;
  • 권오붕 (부경대학교 기계공학과) ;
  • 김태형 (한전전력연구원 발전연구소) ;
  • 박종호 (충남대학교 기계공학과)
  • Received : 2014.11.18
  • Accepted : 2015.01.05
  • Published : 2015.03.30
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Abstract

Numerical study was conducted to clarify effects of added $H_2O$ for the downstream interaction between $H_2$-air and CO-air premixed flames in counterflow configuration. The reaction mechanism adopted was Davis model which had been known to be well in agreement with reliable experimental data. The results showed that both lean and rich flammable limits were reduced in increase of strain rate. The most discernible difference between the two with and without having $H_2O$ and/or $H_2$ addition into $H_2$-air and CO-air premixtures was two flammable islands for the former and one island for the latter at high strain flame conditions. Even a small amount of $H_2$, in which $H_2$-air premixed flame cannot be sustained by itself, participates in CO oxidation, thereby altering the CO-oxidation reaction path from the main reaction route $CO+O_2{\rightarrow}CO_2+O$ with a very long chemical time in CO-air flame to the OH-related reaction routes including $CO+OH{\rightarrow}CO_2+H$ with very short chemical times. This intrinsic nature alters flame stability maps appreciably. The results also showed that chemical effects of added $H_2O$ help lean flames at relatively low strain rate be sustained, and suppress the flame stabilization at high strain rates.

Keywords

References

  1. Vu TM, Song WS, Park J, Kwon OB, Yu HS. Measurements of propagation speeds and flame instabilities in biomass derived gas-air premixed flames. Int. J. Hydrogen Energy 2011;36:12058-12067. https://doi.org/10.1016/j.ijhydene.2011.06.082
  2. Song WS, Park J, Kwon OB, Kim YJ, Kim TH, Yun JH, Keel SI. Effects of syngas addition on flame propagation and stability in outwardly propagating spherical dimethyl ether-air premixed flame. Int. J. Hydrogen Energy 2013;38:14102-14114. https://doi.org/10.1016/j.ijhydene.2013.08.037
  3. Fotache CG, Tan Y, Sung CJ, Law CK. Ignition of $CO/H_2/N_2$ versus heated air in counterflow: experimental and modeling results. Combust Flame 2000;120:417-26. https://doi.org/10.1016/S0010-2180(99)00098-X
  4. Vagelopoupos CM, Egolfpoulos FN. Laminar flame speeds and extinction strain rates of mixtures of carbon monoxide with hydrogen, methane, and air. Proc Combust Inst 1994;25:1317-23.
  5. Mclean IC, Smith DB, Taylor SC. The use of carbon monoxide/hydrogen burning velocities to examine the rate of the CO+OH reaction. Proc Combust Inst 1994;25:749-57.
  6. Brown MJ, Mclean IC, Smith DB, Taylor SC. Markstein lengths of $CO/H_2/$air flames using expanding spherical flames. Proc Combust Inst 1996;26:875-81.
  7. Natarajan J, Lieuwen T, Seitzman J. Laminar flame speeds of $H_2/CO$ mixture effects of $CO_2$ dilution, preheat temperature, and pressure. Combust Flame 2007;151:104-9. https://doi.org/10.1016/j.combustflame.2007.05.003
  8. Vu TM, Park J, Kwon OB, Kim JS. Effects of hydrocarbon addition on cellular instabilities in expanding syngas-air spherical premixed flames. Int J Hydrogen Energy 2009;34:6961-9. https://doi.org/10.1016/j.ijhydene.2009.06.067
  9. Davis SG, Joshi AV, Wang H, Egolfopoulos F. An optimized kinetic model of $H_2/CO$ combustion. Proc Combust Inst 2005;30:1283-92.
  10. Park J, Keel SI, Yun JH, Kim TK. Effects of addition of electrolysis products in methane-air diffusion flames. Int J Hydrogen Energy 2007; 32:4059-70. https://doi.org/10.1016/j.ijhydene.2007.05.024
  11. Park J, Keel SI, Yun JH. Addition Effects of $H_2$ and $H_2O$ on Flame Structure and Pollutant Emission in Methane-Air Diffusion Flame. Energy & Fuels 2008;21:3216-24.
  12. Kim JS, Park J, Kwon OB, Yun JH, Keel SI, Kim TK. Preferential diffusion effects on NO formation in methane/hydrogen-air diffusion flames. Energy & Fuels 2008; 22:278-83. https://doi.org/10.1021/ef700505a
  13. Ishizuka S, Law CK. An experimental study on extinction and stability of stretched premixed flames. Proc. Combust. Inst. 1982;19:327-35.
  14. Sohrab SH, Ye ZY, Law CK. An experimental investigation on flame interaction and the existence of negative flame speeds. Proc Combust Inst 1984; 20:1957-65.
  15. Sohrab SH, Ye ZY, Law CK. Theory of interactive combustion of counterflow premixed flames. Combust Sci Technol 1986;45:27. https://doi.org/10.1080/00102208608923840
  16. Chung SH, Kim JS, Law CK. Extinction of interacting premixed flames: theory and experimental comparisons. Proc Combust Inst 1986;21:1845-51.
  17. Kim JS, Park J, Bae DS, Vu TM, Ha JS, Kim TK. A Study on Methane-air Premixed Flames Interacting with Syngas-air Premixed Flames. Int J Hydrogen Energy 2010;35:1390-400. https://doi.org/10.1016/j.ijhydene.2009.11.078
  18. Ha JS, Moon CW, Park J, Kim JS, Yun JH, Keel SI. A Study on Flame Interaction between Methaneair and Nitrogen-diluted Hydrogen-air Premixed Flames. Int J Hydrogen Energy 2010;35:6992-7001. https://doi.org/10.1016/j.ijhydene.2010.04.104
  19. Ha JS, Park J, Vu TM, Kwon OB, Yun JH, Keel SI. Effect of flame stretch in downstream interaction between premixed syngas-air flames. Int J Hydrogen Energy 2011;36: 13181-93. https://doi.org/10.1016/j.ijhydene.2011.07.042
  20. Kim TH, Song WS, Park J, Kwon OB, Park JH. Effects of Preferential Diffusion on Downstream Interaction in Premixed $H_2/CO$ Syngas-Air Flames. Int J Hydrogen Energy 2012;37:12015-27. https://doi.org/10.1016/j.ijhydene.2012.05.074
  21. Kim YJ, Kim TH, Park J, Kwon OB, Yun JH, Keel SI. Preferential diffusion effects in downstream interaction between premixed $H_2$-air and CO-air flames. Fuel 2014;116: 550-559. https://doi.org/10.1016/j.fuel.2013.08.055
  22. Jung SW, Park J, Kwon OB, Kim YJ, Keel SI, Yun JH, Lim IG. Effects of $CO_2$ addition on flame extinction in interacting $H_2$-air and CO-air premixed flames. Fuel 2014;136:69-78. https://doi.org/10.1016/j.fuel.2014.07.009
  23. Park J, Keel SI, Yun JH. Addition Effects of $H_2$ and $H_2O$ on Flame Structure and Pollutant Emission in Methane-Air Diffusion Flame. Energy & Fuels 2007;21:3216-3224. https://doi.org/10.1021/ef700211m
  24. Kee RJ, Miller JA, Evans GH, Dixon-Lewis G. A computational model of the structure and extinction of strained, opposed flow, premixed methaneare flame. Proc Combust Inst 1988;22:1479-94.
  25. Lutz AE, Kee RJ, Grcar JF, Rupley FM. A fortran program for computing opposed-flow diffusion flames. Sandia National Laboratories Report. SAND 96-8243; 1997.
  26. Ju Y, Guo H, Maruta K, Liu F. On the extinction limit and flammability limit of non-adiabatic stretched methane-air premixed flames. J Fluid Mech 1997;342:315. https://doi.org/10.1017/S0022112097005636
  27. Kee RJ, Rupley FM, Miller JA. Chemkin II: a fortran chemical kinetics package for analysis of gas phase chemical kinetics. Sandia National Laboratories Report. SAND 89-8009B; 1989.
  28. Kee RJ, Dixon-Lewis G, Warnatz J, Coltrin ME, Miller JA. A fortran computer code package for the evaluation of gas-phase multi-component transport. Sandia National Laboratories Report. SAND 86-8246; 1994.
  29. Nishioka A, Law CK, Takeno T. A flame-controlling continuation method for generating S-curve responses with detailed chemistry. Combust. Flame 1996;104: 328-342. https://doi.org/10.1016/0010-2180(95)00132-8