title: Characterization of complexities in combustion instability in a lean premixed gas-turbine model combustor.
abstract: We characterize complexities in combustion instability in a lean premixed gas-turbine model combustor by nonlinear time series analysis to evaluate permutation entropy, fractal dimensions, and short-term predictability. The dynamic behavior in combustion instability near lean blowout exhibits a self-affine structure and is ascribed to fractional Brownian motion. It undergoes chaos by the onset of combustion oscillations with slow amplitude modulation. Our results indicate that nonlinear time series analysis is capable of characterizing complexities in combustion instability close to lean blowout.
authors.affiliation: Department of Mechanical Engineering, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu-shi, Shiga 525-8577, Japan. gotoda@se.ritsumei.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Gotoda
authors.forename: Masahito
authors.initials: M
authors.lastname: Amano
authors.forename: Takaya
authors.initials: T
authors.lastname: Miyano
authors.forename: Takuya
authors.initials: T
authors.lastname: Ikawa
authors.forename: Koshiro
authors.initials: K
authors.lastname: Maki
authors.forename: Shigeru
authors.initials: S
authors.lastname: Tachibana