Combustion Control and Symptom Detection on Self-excited Combustion Oscillation

자려 연소진동에 관한 연소제어와 징후의 검출

  • 양영준 (오사카대학교 대학원 기계물리공학과)
  • Published : 2004.11.01

Abstract

An idea to suppress the self-excited combustion oscillation was applied to the flames. The characteristics of unsteady combustion were examined and the unsteady combustion was driven by forced pulsating mixture supply that can modulate its amplitude and frequency. The self-excited combustion oscillation having weaker flow velocity fluctuation intensity than that of the forced pulsating supply can be suppressed by this method. The effects of the forced pulsation amplitude and frequency on controlling self-excited combustion oscillations were also investigated comparing with the steady mixture supply. The unsteady combustion used in this experiment plays an important role in controlling self-excited combustion oscillation. Symptoms of self-excited combustion oscillation were also studied in order to predict the onset of combustion oscillation before it proceeded to a catastrophic failure For the purpose, the unique measures to observe the onset of self-excited combustion oscillations based on the careful statistics of fluctuating properties in flames, such as pressure or emission of OH radicals, have been proposed.

Keywords

References

  1. A. A. Putnum, 'Combust ion-Driven Oscillation in Industry,' Elsevier, London. 1971
  2. M. Katsuki and J. H. Whitelaw, 'The Influence of Duct Geometry on Unsteady Premixed Flames,' Combustion and Flame, Vol. 63, pp. 83-94, 1986
  3. K. R. McManus, T. Poinsot and S. M. Candel, 'A Review of Active Control of Combustion Instabilities,' Prog. Energy Combust. Sci., Vol. 19, pp. 1-29, 1993
  4. H. Ichiro and S. Kazuo, 'Development of Small Twin-Valveless Pulse Combustors : Effect of Injection System,' Combust. Sci. and Tech, Vol. 94, pp. 43-55, 1993 https://doi.org/10.1080/00102209308935303
  5. C. Poppe, S. Sivasegaram and J. H. Whitelaw, 'Control of NOx Emissions in Confined Flames by Oscillations,' Combustion and Flame, Vol. 113, pp. 13-26, 1998 https://doi.org/10.1016/S0010-2180(97)00164-8
  6. D. R. Englund and W. B. Richards, 'The Infinite Line Probe,' Proceedings of the 30th International Instrumenta-tion Symposium, Instrument Society of America, pp. 115-124, 1984
  7. G. A. Richards and M. C. Janus, 'Characterization of Oscillations During Premixed Gas Turbine Combustion,' ASME Trans., Vol. 120, pp. 294-302, 1998
  8. J. O. Keller and K. Saito 'Measurement of the Combustion Flow in a Pulse Combustor,' Combust. Sci. and Tech., Vol. 53, pp. 137-163, 1987 https://doi.org/10.1080/00102208708947024
  9. K. R. McManus, U. Vandsburger and C. T. Bowman, 'Combust or Performance Enhancement Through Direct Shear Layer Excitation,' Combustion and Flame, Vol. 82, pp. 75-91, 1990