Citation

Kabiraj L, Saurabh A, Wahi P, Sujith RI. Chaos Solitons Fractals 2012; 22(2): 023129.

Affiliation

Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai 600036, India.

Copyright

(Copyright © 2012, Elsevier Publishing)

DOI

10.1063/1.4718725

PMID

22757536

Abstract

Complex thermoacoustic oscillations are observed experimentally in a simple laboratory combustor that burns lean premixed fuel-air mixture, as a result of nonlinear interaction between the acoustic field and the combustion processes. The application of nonlinear time series analysis, particularly techniques based on phase space reconstruction from acquired pressure data, reveals rich dynamical behavior and the existence of several complex states. A route to chaos for thermoacoustic instability is established experimentally for the first time. We show that, as the location of the heat source is gradually varied, self-excited periodic thermoacoustic oscillations undergo transition to chaos via the Ruelle-Takens scenario.

Language: en