Chaos in an imperfectly premixed model combustor.
This article reports nonlinear bifurcations observed in a laboratory scale, turbulent combustor operating under imperfectly premixed mode with global equivalence ratio as the control parameter. The results indicate that the dynamics of thermoacoustic instability correspond to quasi-periodic bifurcation to low-dimensional, deterministic chaos, a route that is common to a variety of dissipative nonlinear systems. The results support the recent identification of bifurcation scenarios in a laminar premixed flame combustor (Kabiraj et al., Chaos: Interdiscip. J. Nonlinear Sci. 22, 023129 (2012)) and extend the observation to a practically relevant combustor configuration.
Hermann Föttinger Institut, Technische Universität Berlin, Germany.
Lipika
L
Kabiraj
Hermann Föttinger Institut, Technische Universität Berlin, Germany.
Aditya
A
Saurabh
School of Engineering, University of Glasgow, United Kingdom.
Nader
N
Karimi
University of Wisconsin-Madison, Madison 53706, USA.
Anna
A
Sailor
Department of Engineering, University of Cambridge, United Kingdom.
Epaminondas
E
Mastorakos
Department of Engineering, University of Cambridge, United Kingdom.
Ann P
AP
Dowling
Hermann Föttinger Institut, Technische Universität Berlin, Germany.
Christian O
CO
Paschereit