Chaotic thermoacoustic oscillations in an aero-engine combustor with a liquid-fuelled turbulent diffusion flame

Yu Guan, Larry K.B. Li, Byeonguk Ahn, Kyu Tae Kim

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

Abstract

We experimentally investigate the nonlinear dynamics of a thermoacoustically self-excited aero-engine combustion system featuring a turbulent swirling liquid-fuelled diffusion flame in a variable-length combustor. We characterize the steady-state dynamics of the system via time-resolved measurements of the acoustic pressure in the combustor. When the combustor length is increased after the onset of thermoacoustic instability, we find that the pressure signal transitions from a period-1 limit cycle to chaos via the Ruelle?Takens?Newhouse route. This shows that a liquid-fuelled diffusion-flame combustor can exhibit dynamics as complex as those of its gaseous-fuelled counterparts.

Original languageEnglish
Publication statusPublished - 2019
Externally publishedYes
Event12th Asia-Pacific Conference on Combustion, ASPACC 2019 - Fukuoka, Japan
Duration: 1 Jul 20195 Jul 2019

Conference

Conference12th Asia-Pacific Conference on Combustion, ASPACC 2019
Country/TerritoryJapan
CityFukuoka
Period1/07/195/07/19

ASJC Scopus subject areas

  • General Chemical Engineering
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Condensed Matter Physics

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