대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제28권4호
  • /
  • Pages.371-381
  • /
  • 2004
  • /
  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

수소-산소 대향류 확산 화염에서 산화제와 연료측에 첨가된 Co2의 화학적 효과에 관한 수치해석 연구

A Numerical Study on Chemical Effects of Co2 Addition to Oxidizer and Fuel Streams in H2-O2 Counterflow Diffusion Flames

  • 이기만 (전남도립남도대학 기계자동차과) ;
  • 박정 (순천대학교 기계자동차공학부)
  • 발행 : 2004.04.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Numerical simulation of $CO_2$ addition effects to fuel and oxidizer streams on flame structure has been conducted with detailed chemistry in H$_2$-O$_2$ diffusion flames of a counterflow configuration. An artificial species, which displaces added $CO_2$ in the fuel- and oxidizer-sides and has the same thermochemical, transport, and radiation properties to that of added $CO_2$, is introduced to extract pure chemical effects in flame structure. Chemical effects due to thermal dissociation of added $CO_2$ causes the reduction flame temperature in addition to some thermal effects. The reason why flame temperature due to chemical effects is larger in cases of $CO_2$ addition to oxidizer stream is well explained though a defined characteristic strain rate. The produced CO is responsible for the reaction, $CO_2$＋H=CO＋OH and takes its origin from chemical effects due to thermal dissociation. It is also found that the behavior of produced CO mole fraction is closely related to added $CO_2$ mole fraction, maximum H mole fraction and its position, and maximum flame temperature and its position.

키워드

참고문헌

  1. Li, S.C., Williams, F. A., 1999, 'NOx Formation in Two-stage Methane-air Flames,' Combustion and Flame, Vol. 118, p. 399 https://doi.org/10.1016/S0010-2180(99)00002-4
  2. Park, J., Lee, K. H. and Kim, K. S., 2002b, 'Diluent Effect of Air Stream on NO Emission Characteristic in $H_2/Ar$ Counterflow Diffusion Flame,' International Journal of Energy Research, Vol. 26, p. 455 https://doi.org/10.1002/er.796
  3. Park, J., Kim, S. G., Lee, K. M. and Kim, T. K., 2002c, 'Chemical Effect of Diluents on Flame Structure and NO Emission Characteristic in Methane-air Counterflow Diffusion Flame,' International Journal of Energy Research, Vol. 26, p. 1141 https://doi.org/10.1002/er.841
  4. Kim, S. G., Park, J. and Keel, S. I., 2002, 'Thermal and Chemical Contributions of Added $H_2O$ and $CO_2$ to Major Flame Structures and NO Emission Characteristics in $H_2/N_2$ Laminar Diffusion Flame,' International Journal of Energy Research, Vol. 26, p. 1073 https://doi.org/10.1002/er.837
  5. Rortveit, G. J., Hustad, J. E. and Li, S. C., Williams, F. A., 2002, 'Effects of Diluents on NOx Formation in Hydrogen Counterflow Flames,' Combustion and Flame, Vol. 130, p. 48 https://doi.org/10.1016/S0010-2180(02)00362-0
  6. Feese, J. J., Turns, S. R., 1998, 'Nitric Oxide Emissions From Laminar Diffusion Flames: Effects of Air-side versus Fuel-side Diluents Addition,' Combustion and Flame, Vol. 113, p. 66 https://doi.org/10.1016/S0010-2180(97)00217-4
  7. Du, D. X., Axelbaum, R.J. and Law, C. K., 1990, 'The Influence of Carbon Dioxide and Oxygen as Additives on Soot Formation in Diffusion Flames,' Proceedings of the 23rd International Symposium on Combustion, The Combustion Institute, p. 1501
  8. Ju, Y., Guo, H., Maruta, K. and Liu, F., 1997, 'On The Extinction Limit and Flammability Limit of Non-adiabatic Stretched Methane-Air Premixed Flames,' Journal of Fluid Mechanics, Vol. 342, p. 315 https://doi.org/10.1017/S0022112097005636
  9. Lee, C. E., Lee, S. R., Han, J. W. and Park, J., 2001, 'Numerical Study on Effect of $CO_2$ Addition in Flame Structure and NOx Formation of $CH_4-air$ Counterflow Diffusion Flames,' International Journal of Energy Research, Vol. 25, p. 343 https://doi.org/10.1002/er.686
  10. Park, J., Lee, K. M. and Lee, E. J., 2001, 'Effects of Ambient Pressure on Flame Structure of $CO/H_2/N_2$ Counterflow Diffusion Flame,' International Journal of Energy Research, Vol. 25, p. 187 https://doi.org/10.1002/er.671
  11. Park, J., Lee, K. M. and Lee, E. J., 2001, 'Effects of CO2 Addition on Flame Structure in Counterflow Diffusion Flame of $H_2/CO_2/N_2$ Fuel,' International Journal of Energy Research, Vol. 25, p. 469 https://doi.org/10.1002/er.672
  12. Park, J., Lee, K. H. and Lee, K. M., 2002a, 'NO Emission Characteristics in Counterflow Diffusion Flame of Blended Fuel of $H_2/CO_2/Ar$,' International Journal of Energy Research, Vol. 26, p. 229 https://doi.org/10.1002/er.778
  13. Liu, F., Guo, H., Smallwood, G.J. and Gulder, O., 2001, 'The Chemical Effects of Carbon Dioxide as an Additive in an Ethylene Diffusion Flame: Implications for Soot and NOx Formation,' Combustion and Flame, Vol. 125, p. 778 https://doi.org/10.1016/S0010-2180(00)00241-8
  14. Chellian, H. K., Law, C. K., Ueda, T. and Smooke, M. D., Williams, F. A., 1990, 'An Experimental and Theoretical Investigation of the Dilution, Pressure and Flow-field Effects on the Extinction Condition of Methane-air-nitrogen Diffusion Flames,' Proceedings of the 23rd International Symposium on Combustion, The Combustion Institute, p. 503
  15. Atreya, M., Zhang, C, Kim, H. K., Shamim, T. and Suh, J., 1996, 'The Effect of Changes in the Flame Structure on the Formation and Destruction of Soot and NOx in Radiating Diffusion Flames,' Proceedings of the 26th International Symposium on Combustion, The Combustion Institute, p. 2181
  16. Williams, B. A., Pasternack, L., 1997, 'The Effect of Nitric Oxide on Premixed Flames of $CH_4$, $C_2H_6$, $C_2H_4$, and $C_2H_2$,' Combustion and Flame, Vol. 111, p. 87 https://doi.org/10.1016/S0010-2180(97)00091-6
  17. Kee, R. J., Miller, J. A., Evans, G. H. and Dixon-Lewis, G., 1988, 'A Computational Model of the Structure and Extinction of Strained, Opposed Flow, Premixed Methane-air Flame,' Proceedings of the 22nd Symposium (International) on Combustion, The Combustion Institute, p. 1479
  18. Kee, R. J., Rupley, F. M. and Miller, J. A., 1989, 'Chemkin-II: A Fortran Chemical Kinetics Package for Analysis of Gas Phase Chemical Kinetics,' Sandia Report, SAND89-8009B
  19. Kee, R. J., Dixon-Lewis, G., Warnatz, J., Coltrin, M. E. and Miller, J. A., 1994, 'A Fortran Computer Code Package for the Evaluation of Gas-phase Multicomponent Transport,' Sandia Report, SAND86-8246
  20. Lutz, A. E., Kee, R. J., Grcar, J. F. and Rupley, F. M., 1997, 'A Fortran Program for Computing Opposed-flow Diffusion Flames,' Sandia Report, SAND96-8243
  21. Sandia Report, SAND96-8243 A Fortran Program for Computing Opposed-flow Diffusion Flames Lutz,A.E.;Kee,R.J.;Grcar,J.F.;Rupley,F.M.