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2019 Vol.24, Issue 2 Preview Page

Research Article

Subcritical Bifurcation of Two Self-Excited Interacting Swirl Flames

상호작용하는 두 스월 안정 화염에서 발생하는 준임계 분기 현상

Jiho Lee1
,
Junhyeong Park2
,
Dongsik Han2
,
Kyu Tae Kim1*
이 지호1
,
박 준형2
,
한 동식2
,
김 규태1*
1Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology
2Doosan Heavy Industry & Construction
1한국과학기술원 항공우주공학과
2두산중공업 GT연소기개발팀
* Corresponding Author
30 June 2019. pp. 17-24
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Abstract

The nonlinear bifurcation behavior of two self-excited interacting swirl flames was investigated in a model lean-premixed gas turbine combustor. We examined the system’s thermoacoustic state using several time series analysis methods, including spectrograms, phase portraits, and recurrence plots. It was shown that the state of the system in response to the variation of the combustor length is influenced by the presence of multiple attractors, eventually leading to an extremely large amplitude limit cycle via a subcritical bifurcation.

Keywords
Subcritical bifurcation
Combustion instability
Swirling array
Flame-flame interaction
Hysteresis
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Information
  • Publisher :The Korean Society Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of The Korean Society Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 24
  • No :2
  • Pages :17-24
  • Received Date : 2019-01-09
  • Revised Date : 2019-02-18
  • Accepted Date : 2019-04-03
  • DOI :https://doi.org/10.15231/jksc.2019.24.2.017
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