Bifurcation analysis is performed on experimental data obtained from a simple setup comprising ducted laminar premixed conical flames in order to investigate the features of nonlinear thermoacoustic oscillations. It is observed that as the bifurcation parameter is varied, the system undergoes a series of bifurcations leading to characteristically different nonlinear oscillations. Through the application of nonlinear time series analysis to pressure and flame (CH* chemiluminescence) intensity time traces, these oscillations are characterized as periodic, aperiodic, or chaotic oscillations, and subsequently the nature of the obtained bifurcations is explained based on dynamical systems theory. Nonlinear interaction between the flames and the acoustic modes of the duct is clearly reflected in the high speed flame images acquired simultaneously with pressure time series.
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e-mail: lipikakabiraj@gmail.com
e-mail: sujith@iitm.ac.in
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March 2012
Research Papers
Bifurcations of Self-Excited Ducted Laminar Premixed Flames
Lipika Kabiraj,
Lipika Kabiraj
Department of Aerospace Engineering,
e-mail: lipikakabiraj@gmail.com
Indian Institute of Technology Madras
, Chennai-600036, India
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R. I. Sujith,
R. I. Sujith
Department of Aerospace Engineering,
e-mail: sujith@iitm.ac.in
Indian Institute of Technology Madras
, Chennai-600036, India
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Pankaj Wahi
Pankaj Wahi
Department of Mechanical Engineering,
Indian Institute of Technology Kanpur
, Kanpur-208016, India
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Lipika Kabiraj
Department of Aerospace Engineering,
Indian Institute of Technology Madras
, Chennai-600036, India
e-mail: lipikakabiraj@gmail.com
R. I. Sujith
Department of Aerospace Engineering,
Indian Institute of Technology Madras
, Chennai-600036, India
e-mail: sujith@iitm.ac.in
Pankaj Wahi
Department of Mechanical Engineering,
Indian Institute of Technology Kanpur
, Kanpur-208016, India
J. Eng. Gas Turbines Power. Mar 2012, 134(3): 031502 (7 pages)
Published Online: December 29, 2011
Article history
Received:
April 30, 2011
Revised:
May 1, 2011
Online:
December 29, 2011
Published:
December 29, 2011
Citation
Kabiraj, L., Sujith, R. I., and Wahi, P. (December 29, 2011). "Bifurcations of Self-Excited Ducted Laminar Premixed Flames." ASME. J. Eng. Gas Turbines Power. March 2012; 134(3): 031502. https://doi.org/10.1115/1.4004402
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