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

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

DOI QR Code

Study on Heat-Loss-Induced Self-Excitation in Laminar Lifted Jet Flames

층류제트 부상화염에서 열손실에 의한 자기진동에 관한 연구

  • Yoon, Sung-Hwan (Dept. of Energy System Engineering, Pukyong Nat'l Univ.) ;
  • Park, Jeong (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.) ;
  • Kwon, Oh-Boong (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.) ;
  • Kim, Jeong-Soo (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.) ;
  • Bae, Dae-Seok (Dept. of Mechanical Engineering, Pukyong Nat'l Univ.) ;
  • Yun, Jin-Han (Environmental & Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Keel, San-In (Environmental & Energy Systems Research Division, Korea Institute of Machinery and Materials)
  • 윤성환 (부경대학교 에너지시스템공학과) ;
  • 박정 (부경대학교 기계공학과) ;
  • 권오붕 (부경대학교 기계공학과) ;
  • 김정수 (부경대학교 기계공학과) ;
  • 배대석 (부경대학교 기계공학과) ;
  • 윤진한 (한국기계연구원 그린환경에너지기계연구본부) ;
  • 길상인 (한국기계연구원 그린환경에너지기계연구본부)
  • Received : 2010.11.30
  • Accepted : 2011.01.03
  • Published : 2011.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

We experimentally investigated lifted propane jet flames diluted with nitrogen to obtain flame-stability maps based on heat-loss-induced self-excitation. We found that heat-loss-induced self-excitations are caused by conductive heat loss from premixed flame branches to trailing diffusion flames as well as soot radiation. The conductive-heat-loss-induced self-excitation at frequencies less than 0.1 Hz is explained well by a suggested mechanism, whereas the oscillation of the soot region induces a self-excitation of lift-off height of the order of 0.1 Hz. The suggested mechanism is also verified from additive experiments in a room at constant temperature and humidity. The heat-loss-induced self-excitation is explained by the Strouhal numbers as a function of the relevant parameters.

질소 희석된 프로판 부상화염에서 열손실에 의한 자기진동을 기초로 화염안정화선도를 도출하기 위하여 노즐직경 0.3 mm, 1.0 mm에서 실험적 연구를 수행하였다. 예혼합화염에서 확산화염으로의 전도 열손실에 의한 자기진동 및 매연 복사에 의한 자기진동을 관찰하였다. 0.1 Hz보다 낮은 주파수 성향을 띄는 열손실에 의한 자기진동은 제안된 메커니즘에 의해 잘 묘사되었고 반면 매연복사에 의한 자기진동은 O(0.1 Hz)의 주파수 범위를 나타내었으며 제안된 메커니즘은 항온항습실 실험을 통해 입증하였다. 질소 희석된 프로판 부상화염에서 관찰된 열손실에 의한 자기진동의 특성화는 관련된 변수 및 스트라훌 수에 의해 잘 묘사되었다.

Keywords

References

  1. Ross, H. D., Sotos, R. G. and T’ien, J. S., 1991, "Observation of Candle Flames Under Various Atmospheres in Microgravity," Combust. Sci. Tech., Vol. 75, pp. 155-160. https://doi.org/10.1080/00102209108924084
  2. Chan, W. Y. and T’ien, J. S., 1978, “An Experiment on Spontaneous Flame Oscillation Prior to Extinction," Combust. Sci. Tech., Vol. 18, PP. 139-143. https://doi.org/10.1080/00102207808946845
  3. Furi, M., Papas, O. and Monkewitz, P. A., 2000, "Non-premixed Jet Flame Pulsations Near Extinction," Proc. Combust. Inst., Vol. 28, pp. 831-838. https://doi.org/10.1016/S0082-0784(00)80287-8
  4. Plessing, T., Terhoeven, P., Peters, N. andMansour, M. S., 1998, "An Experimental and Numerical Study of a Laminar Triple Flame," Combust. Flame, Vol. 115, pp. 335-353. https://doi.org/10.1016/S0010-2180(98)00013-3
  5. Buckmaster, J., Hegab, A. and Jackson, T. L., 2000, "More Results on Oscillating Edge-flames," Phys. Fluids, Vol. 12, pp. 1592-1600. https://doi.org/10.1063/1.870406
  6. Buckmaster, J., 2001, "Large-Lewis-Number Instabilities of Model Edge-Flames," Combust. Flame, Vol. 127, pp. 2223-2233. https://doi.org/10.1016/S0010-2180(01)00324-8
  7. Cheamtham, S. and Matalon, M., 1996, "Heat Loss and Lewis Number Effects on the Onset of Oscillation in Diffusion Flames," Proc. Combust. Inst., Vol. 26, pp. 1063-1070. https://doi.org/10.1016/S0082-0784(96)80320-1
  8. Kirkby, L. L., Schmitz, R. A., 1996, "An Analytical Study of the Stability of a Laminar Diffusion Flame," Combust. Flame, Vol.26, pp. 205-220.
  9. Kurdyumov, V. N. and Matalon, M., 2002, "Radiation Losses as a Driving Mechanism for Flame Oscillations," Proc. Combust. Inst., Vol. 29, pp. 45-52. https://doi.org/10.1016/S1540-7489(02)80010-4
  10. Kurdyumov, V. N. and Matalon, M., 2007, "Stabilization and Onset of Oscillation of an Edgeflame in the Near-wake of a Fuel Injector," Proc. Combust. Inst., Vol. 31, pp. 909-917. https://doi.org/10.1016/j.proci.2006.07.248
  11. Park, J. S., Hwang, D. J., J. Park, Kim, J. S.,Kim, S., Keel, S. I., Kim, T. K. and Noh, S. S.,2006, Edge Flame Instability in Low-strain-rate Couterflow Diffusion Flames," Combust. Flame, Vol. 146, pp. 612-619. https://doi.org/10.1016/j.combustflame.2006.06.009
  12. Park, D. G., Yun, J. H., Park, J. and Keel, S.I., 2009, "A Study on Flame Extinction Characteristics along a C-Curve," Energy&Fuels, Vol. 23, pp. 4236-4244
  13. Won, S. H., Chung, S. H., Cha, M. S. andLee, B. J., 2000, "Lifted Flame Stabilization in Developing and Developed Regions of Coflow Jets for Highly Diluted Propane," Proc. Combust. Inst., Vol. 28, pp. 2093-2099. https://doi.org/10.1016/S0082-0784(00)80618-9
  14. Won, S. H., Kim, J., Shin, M. K., Chung, S.H., Fujita, O., Mori, T., Choi, J. H. and Ito, K.,2002, "Normal and Microgravity Experiment of Oscillating Lifted Flames on Coflow," Proc. Combust. Inst., Vol. 29, pp. 37-44. https://doi.org/10.1016/S1540-7489(02)80009-8
  15. Cetegen, B. M. and Kasper, K. D., 1996, "Experiments on the Oscillatory Behavior of Buoyant Plumes of Helium and Helium-Air Mixture," Phys. Fluids, Vol. 8, pp. 2974-2984. https://doi.org/10.1063/1.869075
  16. Lee, B. J. and Chung, S. H., 1997,"Stabilization of Lifted Tribrachial Flames in a Laminar Nonpremixed Jet". Combust. Flame, Vol. 109, pp 163-172. https://doi.org/10.1016/S0010-2180(96)00145-9
  17. Reutsch, G. R., Vervisch, L. and Linan, A., 1995, "Effects of Heat Release on Triple Flames," Phys. Fluids, Vol. 6(7), pp. 1447-1454.
  18. Chung, S. H., 2007, "Stabilization, Propagation and Instability of Tribrachial Triple Flames," Combust. Flame, Vol. 31, pp. 877-892.
  19. Ko, Y. S., Chung, T. M., Chung, S. H. andMech, J., 2002, "Characteristics of Propagating Tribrachial Flames in Counterflow," Combust. Sci. Tech., Vol. 16, pp. 1710-1718.
  20. Kim, N. I., Seo, J. I., Oh, K. C. and Shin, H.D., 2005, "Lift-off Characteristics of Triple Flame with Concentration Gradient," Proc., Combust. Inst., Vol. 30, pp. 367-374. https://doi.org/10.1016/j.proci.2004.07.001
  21. Chen, Y. C. and Bilger, R. W., 2000, "Stabilization Mechanisms of Lifted Laminar Flames in Axisymmetric Jet Flows," Combust. Flame, Vol. 122, pp. 377-399. https://doi.org/10.1016/S0010-2180(00)00120-6
  22. Yoon, S. H., Park, J., Kwon, O. B. and Bae,D. S., 2010, "Study of Characteristics of Self-Excitation in Lifted Laminar Free-Jet Propane Flames Diluted with Nitrogen," Trans. of the KSME(B)., Vol. 4, pp. 399-408.
  23. Yoon, S. H., Park, J., Kwon, O. B. and Kim,J. S., 2010, "Study on Flame Oscillations in Laminar Lift-off Butane Flames Diluted with Nitrogen," Trans. of the KSME(B)., Vol. 7, pp. 665-738.
  24. Katta, V.R., Roquemore, W.M., Menon, A.,Lee, S.Y., Santora, R.J. and Litzinger, T.A.,2009, "Impact of Soot on Flame Flicker," Proc. Combust. Inst., Vol. 32, pp. 1341-1350.