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

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

DOI QR Code

Effect of the Degree of Fuel-Air Mixing and Equivalence Ratio on the NOx Emission and Heat Release in a Dump Combustor

모형연소기에서 연료-공기의 혼합정도 및 당량비가 NOx 배출과 열 방출량에 미치는 영향에 대한 연구

  • 조봉국 (부산대학교 대학원 기계공학부) ;
  • 최도욱 (부산대학교 대학원 기계공학부) ;
  • 김규보 (부산대학교 화력발전에너지분석기술센터(PC3)) ;
  • 장영준 (부산대학교 기계기술연구원(RIMT) 기계공학부) ;
  • 송주헌 (부산대학교 기계기술연구원(RIMT) 기계공학부) ;
  • 전충환 (부산대학교 기계공학부)
  • Published : 2009.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

Lean premixed combustors are used for significant NOx reduction which one of issues in current gas turbine combustor. This study was investigated to estimate the effects of the unmixedness of fuel-air, equivalence ratio on the instability mechanism, NOx emission and combustion oscillation in a lean premixed combustor. The experiments were conducted in a dump combustor at atmospheric pressure conditions using methane as fuel. The swirler angle was $45^{\circ}$, the degrees of fuel-air mixing were 0, 50 and 100 and inlet temperature was 650K. The equivalence ratio was ranging from 0.5 to 0.8. This paper shows that NOx emission was increased when the degree of fuel-air mixing is increased in same equivalence ratio and when equivalence ratio is increased. And the range of the combustion instability was enlarged as a function of increasing of the degree of fuel-air mixing.

Keywords

References

  1. Wulff, A. and Hourmouziadis, J., 1997, 'Technology Review of Aeroengine Pollutant Emissions,' Aerospace Science and Technology, Vol. 8, pp. 557-572. https://doi.org/10.1016/S1270-9638(97)90004-3
  2. Lefebvre, 1999, 'Gas Turbine Combustion,' 2nd Ed, Taylor & Francis
  3. Leonard, G. and Stegmaier, J., 1993, 'Development of an Aeroderivative Gas Turbine Dry Low Emission Combustion System,' Journal of Engineering for Gas Turbines and Power, Vol. 116, pp. 542-546 https://doi.org/10.1115/1.2906853
  4. Jones, C. M., Lee, J. G. and Santvicca, D. A., 1999, 'Closed-loop Active Control of Combustion Instabilities Using Subharmonic Secondary Fuel Injection,' J. of Propulsion and Power, Vol. 15, No. 4, pp. 584-590 https://doi.org/10.2514/2.5467
  5. Seo, S., 1999, 'Parametric Study of Lean Premixed Combustion Instability in a Pressurized Model Gas Turbine Combustor,' Ph.D Thesis, The Pennsylvania State University
  6. Gupta, A.K., Lilley, D. G. and Syred, N., 1984, 'Swirl Flows,' Abacus Press, Tuhbridge Wells, England
  7. Paschereit, C. O., Gutmark, E. and Weisenstein, W., 1998, 'Control of Thermoacustic Instabilities and Emissions in an Industrial-Type Gas-Turbine Combustor,' Proc. Combust. Instit, Vol. 27, pp. 1817~1824 https://doi.org/10.1016/S0082-0784(98)80023-4
  8. Samaniego, J. M., Egolfopoulos, F. N. and Bowman, C. T., 1995, '$CO_2$* Chemiluminescence in Premixed Flames,' Combust. Sci. and Tech., Vol. 109, pp. 312-332
  9. Dandy, D. S. and Vosen, S. R., 1992, 'Numerical and Experimental Studies of Hydroxyl Radical Chemiluminescence in Methane-Air Flames,' Combust. Sci. and Tech., Vol. 82, pp. 131-150 https://doi.org/10.1080/00102209208951816
  10. Sivasegaram, S. and Whitelaw, J. H., 1987, 'Oscillations in Axisymmetric Dump Combustors,' Combust. Sci. and Tech, Vol. 42, pp. 413-420 https://doi.org/10.1080/00102208708952586
  11. Jong Ho Lee, Dae Hyun Kim, Chung Hwan Jeon and Young June Chang, 2004, 'Experimental Investigation on Flame Structure and Emission Characteristics in a Lean Premixed Model Gas Turbine Combustor,' Journal of KAME(B), Vol. 28, No. 4, pp. 425-432 https://doi.org/10.3795/KSME-B.2004.28.4.425
  12. Yong ki Jung, Jeong seog Oh, Chung Hwan Jeon and Young June Chang, 2005, 'Detailed Local Chemiluminescence Measurement (OH*, CH*, $C_2$*) and Nitrogen Oxides Emissions in Laminar Partially Premixed $CH_4$/Air Flames,' Journal of KAME(B), Vol. 29, No. 2, pp. 263-270 https://doi.org/10.3795/KSME-B.2005.29.2.263
  13. Lee, J. G. and Santavicca, D. A., 2003, 'Experimental Diagnostics for the Study of Combustion Instabilities in Lean Premixed Combustors,' J. Prop. Power, Vol. 19, No. 5, pp. 735-750 https://doi.org/10.2514/2.6191
  14. Higgins, B., McQuay, M. Q., Lacas, F., Rolon, J-C., Darabiha, N. and Candel, S., 2001, 'OH Chemiluminescence as an Active Control Parameter for Fuel-Lean, High-Pressure, Premixed, Laminar Flames,' Fuel, Vol. 80, pp. 67-74 https://doi.org/10.1016/S0016-2361(00)00069-7
  15. Haber, L., Vandsberger, U., Saunders, W. and Khanna, V., 2000, 'An Examination of the Relationship Between Chemiluminescence Light Emissions and Heat Release Rate Under Non-Adiabatic Conditions,' ASME paper 2000-GT-0121