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

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Characteristics of Interacting Lifted Flames

상호작용하는 부상화염의 특성에 관한 연구

  • 이승 (영남대학교 대학원 기계공학과) ;
  • 이병준 (영남대학교 기계공학부)
  • Published : 2001.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

The characteristics of nonpremixed interacting flames are investigated in the parameter of nozzle configuration and nozzle separation distane, s. Three nozzle arrangements - diamond 4 nozzle, linear 5 nozzle and cross 5 nozzle- are used. When s is about 10 nozzle diameter, flames lift from the nozzle at the highest fuel flowrate compared with the other s cases. Normally flames are extinguished at the lifted states. Flowrates when blowout occurs are affected by the nozzle configuration, nozzle seperation distance. Blowout flowrates for the diamond- or cross-shaped nozzle cases are parabolic function of s. For 5 cross nozzle case, flames extinguished at 3.3 times higher flowrate than that of single equivalent area nozzle. Turbulent liftoff heights are not function of flowrates for these cases.

Keywords

References

  1. 이종철, 1986, '2개의 원형 노즐에서 분출되는 층류 확산화염의 상호작용에 한 연구,' 공학석사학위논문, 고려대학교
  2. 김호영, 전철균, 1991, '기체확산 화염간의 상호작용,' 대한기계학회논문집 제15권 제1호, pp. 355-365
  3. 전철균, 1993, '상호작용하의 층류 확산 화염에서 NO 의 생성,' 대한기계학회논문집 제17권 제1호, pp. 190-199
  4. Menon, R. and Gollahalli, S. R., 1985, 'Multiple Jet Gas Flames in Still Air,' In Heat Transfer in Fire and Combustion Systems, ASME poblication HTD Vol. 45, pp. 127-136
  5. Menon, R. and Gollahalli, S. R., 1988, 'Combustion Characteristics of Interaction Multiple Jets in Cross Flow,' Combustion. Science and Technology, Vol. 60, pp 375-389 https://doi.org/10.1080/00102208808923994
  6. Burke, S. P. and Schumann, T. E. W., 1928, 'Diffusion Flames,' Industrial and Engineering Chemistru, Vol. 20, No. 10, pp. 998-1004 https://doi.org/10.1021/ie50226a005
  7. Roper, F. G., 1977, 'The Prediction of Laminar Jet Diffusion flame Size: Part I. Theoretical Model,' Combust. Flame, Vol. 29, pp. 219-226 https://doi.org/10.1016/0010-2180(77)90112-2
  8. Peters, N. and Gottgens, J., 1991, 'scaling of Buoyant Turbulent Jet Diffusion Flames,' Combust. Flames, Vol.85, pp. 206-214 https://doi.org/10.1016/0010-2180(91)90188-H
  9. Kalghatgi, G. T., 1984, 'Lift-off Heights and Visible Lengths of Vertical Turbulent Jet Diffusion Flames in Still Air,' Combust. Sci. T, 41, pp. 17-29 https://doi.org/10.1080/00102208408923819