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

The Korean Society of Mechanical Engineers (대한기계학회)
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Experiment on the Characteristics of Jet Diffusion Flames with High Temperature Air Combustion

고온공기를 이용한 제트확산화염의 연소특성에 관한 실험

  • 조은성 (서울대학교 기계항공공학부 대학원) ;
  • 대야건 (일본 동북대학교 유체과학연구소) ;
  • 소림수소 (일본 동북대학교 유체과학연구소) ;
  • 정석호 (서울대학교 기계항공공학부)
  • Published : 2004.03.01
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Abstract

For the development of high efficiency and low emission combustion systems, high temperature air combustion technology has been tested by utilizing preheated air over 1100 K and exhaust gas recirculation. In this system, combustion air is diluted with large amount of recirculated exhaust gases, such that the oxygen concentration is relatively low in the reaction zone, leading to low flame temperature. Since, the temperature fluctuations and sound emissions from the flame are small and flame luminosity is low, the combustion mode is expected to be flameless or mild combustion. Experiment was performed to investigate the turbulent flame structure and NO$_x$ emission characteristics in the high temperature air combustion focused on coflowing jet diffusion flames which has a fundamental structure of many practical combustion systems. The effect of turbulence has also been evaluated by installing perforated plate in the oxidizer inlet nozzle. LPG was used as a fuel. Results showed that even though NO$_x$ emission is sensitive to the combustion air temperature, the present high temperature air combustion system produce low NO$_x$ emission because it is operated in low oxygen concentration condition by the high exhaust gas recirculation.

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References

  1. Wunning, J. A. and Wunning, J. G., 1997, 'Flamless Oxidation to Reduce Thermal NO-Formation,' Prog. Energy Combust. Sci., Vol. 23, pp. 81-94 https://doi.org/10.1016/S0360-1285(97)00006-3
  2. Plessing, T., Peters, N. and Wunning, J. G., 1998, 'Laseroptical Investigation of Highly Preheated Combustion with Strong Exhaust Gas Recirculation,' Twenty-Seventh Symposium (Int.) on Combustion, The Combustion Institute, pp. 3197-3204
  3. Katsuki, M. and Hasegawa, T., 1998, 'The Science and Technology of Combustion in Highly Preheated Air,' Twenty-Seventh Symposium (Int.) on Combustion, The Combustion Institute, pp. 3135-3146
  4. Niioka, T., 1999, 'Fundamentals and Applications of High-Temperature Air Combustion,' Proceedings of the 5th ASME/JSME Joint Thermal Engineering Conference, pp. 1-6
  5. Maruta, K., Muso, K., Takeda, K. and Niioka, T., 2000, 'Reaction Zone Structure in Flameless Combustion,' Twenty-Eighth Symposium (Int.) on Combustion, The Combustion Institute, pp. 2117-2123
  6. Ozdemir, I. B. and Peters, N., 2001, 'Characteristics of the Reaction Zone in a Combustor Operating at Mild Combustion,' Experiments in Fluids, Vol 30, pp. 683-695 https://doi.org/10.1007/s003480000248
  7. Ito, Y., Yoshikawa, K. and Shimo, N., 2003, 'Effect of Different Kinds of Dilution Gases on the Combustion with Highly Preheated Oxygen-Deficient Air,' JSME (B), Vol. 69, No. 677, pp. 107-114 https://doi.org/10.1299/kikaib.69.107
  8. Fuse, R., Kobayashi, H., Ju, Y., Maruta, K. and Niioka, T., 2002, '$NO_x$ Emission from High-Temperature Air/Methane Counterflow Diffusion Flame,' Int. J. Therm. Sci., Vol. 41, pp. 693-698 https://doi.org/10.1016/S1290-0729(02)01364-9
  9. Fujimori, T., Riechemann, D. and Sato, J., 1998, 'Effect of Liftoff on $NO_x$ Emission of Turbulent Jet Flame in High-Temperature Coflowing Air,' Twenty-Seventh Symposium (Int.) on Combustion, The Combustion Institute, pp. 1149-1155