Journal of Mechanical Science and Technology

  • 제16권6호
  • /
  • Pages.851-860
  • /
  • 2002
  • /
  • 1738-494X(pISSN)
  • /
  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

A Study on the Characteristics of Soot Formation and Oxidation in Free Fuel Droplet Array

  • Lee, Myung-Jun (Department of Automotive Engineering, Yangsan College) ;
  • Kim, Jong-Youl (Department of Automotive Engineering, Yangsan College) ;
  • Yeom, Jeong-Kuk (School of Mechanical & Aerospace Engineering, Seoul National University) ;
  • Ha, Jong-Yul (Department of Mechanical Engineering, Donga University) ;
  • Chung, Sung-Sik (Department of Mechanical Engineering, Donga University)
  • 발행 : 2002.05.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, it was attempted to obtain the fundamental data for the formation and oxidation of soot from a diesel engine. Combustion of spray injected into a cylinder is complex phenomenon having physical and chemical processes, and these processes affect each other. There are many factors in the mechanism of the formation and oxidization of soot and it is necessary to observe spray combustion microscopically. In order to observe with that view, free fuel droplet array was used as an experimental object and the droplet array was injected into an atmospheric combustion chamber with high temperature. Ambient temperature of the combustion chamber, interdroplet spacing, and droplet diameter were selected as parameters, which affect the formation and oxidation of soot. In this study, it was found that the parameters also affect ignition delay of droplet. The ambient temperature especially affected the ignition delay of droplet as well as the flame temperature after self-ignition. As the interdroplet spacing that means the local equivalence ratio in a combustion chamber was narrow, formation of soot was increased. As diameter of droplet was large, surface area of the droplet was also broad, and hence evaporation of the droplet was more active than that of a droplet with relative small diameter.

키워드

참고문헌

  1. Chang, Y. J., 1985, 'A Photographic Study of Soot Formation and Combustion in a Diesel Flame with a Rapid Compression Machine,' Proceedings of COMODIA, p. 149
  2. Chung, S. S. and Kawaguchi, O., 1990, 'An Experimental Study on the Evaporation of Freely Falling Droplet Under High Temperature and High Gas Stream,' KSME int. Journal, Vol. 4, No. 2, pp. 172-177 https://doi.org/10.1007/BF02954040
  3. Chung S. S. and Kawaguchi, O., 995, 'Evaporation Rate of Free Paraffine Hydrocarbon Droplets in a High-Temperature and High-Pressure Gas Stream,' JSME int. Journal, Series B, Vol. 38, No. 1, pp. 121-128 https://doi.org/10.1299/jsmeb.38.121
  4. Honoki, H., Yagi M., Tokuoka, N. and Sato, G. T., 1985, JSME (B), Vol. 51, No. 471, p. 3615
  5. Hottel H. G. and Brougton F. P., 1932, 'Determination of True Temperature and Total Radiation from Luminous Gas Flame,' Ind. and Engng. Chem., 4-2, p. 166 https://doi.org/10.1021/ac50078a004
  6. Iida N., 1993, 'Surrounding Gas Effects on Soot Formation and Extinction-Observation of Diesel Spray Combustion Using a Rapid Compression Machine,' SAE Paper No. 930603
  7. Kamimoto T., Aoyagi Y., Mattavi Y. and Matsuoka S., 1980, 'A Gas Sampling Study on the Formation Processes of Soot and NO in a D.I. Diesel Engine,' SAE Paper No. 800254
  8. Lee S.B, Lee, T. W. and Ha J. Y., 1997, 'A Study on the Local Instantaneous Flame Temperature and Soot Formation and Oxidation in a Diesel Engine,' KSAE, Vol. 5, No. 2, pp. 173-182
  9. Lee T. W., Lee S. B. and Ha J. Y., 1996, 'A Study on a Technique of the Measurement of Flame Temperature and Soot Using the Two-Color Method in Diesel Engines,' KSME (B), Vol. 20, No. 9, pp. 3007-3014, (in Korea)
  10. Matsui Y., Kamimoto T., and Matsuoka S., 1979, 'A Study on the Time and Space Resolved Measurement of Flame Temperature and Soot Concentration in a D.I. Disel Engine by the Two-Color Method,' SAE Paper No. 790491
  11. Sawyer R. F., Cemansky N. P. and Oppenheim A. K., 1977, 'Factors Controling Pollutant Emission from Gas Turbine Engines, Atmospheric Pollution by Aircraft Engines, AGARDCP-125, Paper No. 22
  12. Sangiovanni, J. J. and Liscinsky, D. S., 1984, 'Soot Formation Characteristics of Well-Defined Spray Flames,' Twentieth Symposium (International) on Combustion, pp. 1063-1073