Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지
DOI QR코드

DOI QR Code

Combustion Instability Characteristics due to the Beating Phenomenon in the Dual Swirl Gas Turbine Model Combustor

이중선회 가스터빈 모델연소기에서 맥놀이 현상으로 인한 연소불안정 특성

  • Jang, Munseok (Department of Aerospace Engineering, Sunchon National University) ;
  • Lee, Keeman (School of Mechanical and Aerospace Engineering, Sunchon National University)
  • Received : 2016.07.29
  • Accepted : 2016.11.10
  • Published : 2016.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

This study is the results related to the combustion instability phenomenon with respect to combustor length and thermal power as variables in dual swirling combustor configuration. Especially, the beating phenomena having the insensitive resonance frequency of relatively constant peaks are observed when the combustor lengths increase in a lower power regime. This beating phenomenon might be occurred due to the interacting behaviors of pilot and main burners with different periods. Therefore, such insensitive response seems to be a result of the beating phenomenon with interaction between the pilot and main flames even though the combustor lengths are increased.

본 연구는 이중 선회 가스터빈 연소기에서 연소실 길이와 열용량을 변수로 연소불안정 현상과 관련된 결과이다. 특히 열용량이 상대적으로 작은 구간에서 연소실 길이가 길어지면 공진 주파수의 값이 일정하게 유지되는 맥놀이 현상이 발생하는 것이 확인되었다. 이러한 맥놀이 현상은 메인 화염과 파일럿 화염이 각각 다른 주기로 거동하기 때문에 발생되었으며, 연소실 길이가 증가하여도 주파수의 값이 변하지 않는 현상은 메인 화염과 파일럿 화염의 서로 다른 상호작용 결과라고 판단된다.

Keywords

References

  1. Huang, V. and Yang, V., "Dynamics and Stability of Lean-premixed Swirl Stabilized Combustion," Progress in Energy and Combustion Science, Vol. 35, No 4 pp. 293-364, 2009. https://doi.org/10.1016/j.pecs.2009.01.002
  2. Choi, I.C., Lee, K.M., Juddoo, M. and Masri, A.R., "A Study of Combustion Instability Mode in Dual Swirl Gas Turbine Combustor by PLIF and Chemiluminescence Measurement," J. Korean Soc. Combust, Vol. 19, No 1, pp. 29-38, 2014. https://doi.org/10.15231/jksc.2014.19.1.029
  3. Steinberg, A.M., Boxx, I., Stohr, M., Carter, C.D and Meier, W., "Low-flame Interactions causing Acoustically Coupled Heat Release Fluctuations in a Thermoacoustically Unstable Gas Turbine Model Combustor," Combustion and Flame, Vol. 157, No.12, pp. 2250-2256, 2010. https://doi.org/10.1016/j.combustflame.2010.07.011
  4. Rayleigh, J.W.S., "The Explanation of Certain Acoustical Phenomena," Nature, Vol. 18, No. 455, pp. 319-321, 1878. https://doi.org/10.1038/018319a0
  5. Cha, D.J., Song, J.K. and Lee, J.G., "A Case Study on Combustion Instability of a Model Lean Premixed Gas Turbine Combustor with Open Source Code OSCILOS," J. Korean Soc. Combust, Vol. 20, No. 4, pp. 10-18, 2015. https://doi.org/10.15231/jksc.2015.20.4.010
  6. Yoon, M.G., Kim, J.A and Kim, D.S., "A Flame Transfer Function with Nonlinear Phase," Journal of the Korea Society of Propulsion Engineers, Vol. 20, No. 3, pp. 78-86, 2016. https://doi.org/10.6108/KSPE.2016.20.3.078
  7. Jang, M.S. and Lee, K.M., "A Study of Combustion Instability Mode according to the Variation of Combustor Length in Dual Swirl Gas Turbine Model Combustor," J. Korean Soc. Combust, Vol. 21, No. 2, pp. 29-37, 2016. https://doi.org/10.15231/jksc.2016.21.2.029
  8. Syred, N., Abdulsada, M., Griffiths, A., O'oherty, T. and Bowen, P., "The Effect of Hydrogen Containing Fuel Blends upon Flashback in Swirl Burners," Applied Energy, Vol. 89, No. 1, pp. 106-110, 2012. https://doi.org/10.1016/j.apenergy.2011.01.057