The Nonlinearity during Start-Oscillation of Thermo-Acoustic Instability in Rijke-Type Combustor

Abstract:

Article Preview

In order to study the nonlinearity during the start-oscillation of thermo-acoustic instability, an experimental setup was built. The growing process of nonlinearity during the start-oscillation of thermo-acoustic instability was captured and analyzed. Experimental results revealed that after a suitable resonance mode corresponding to the structural of the combustor was selected, the pressure perturbations inside the combustor grow in amplitude into a very large amplitude and self-excited oscillation in a very short period of time. Then, slowly, the nonlinear effects adjust the shapes of pressure waveforms and amplify the oscillations. Ultimately, a limit-cycle oscillation with smooth and uniform pressure waveforms was obtained, and the acoustic waves exhibit only the main resonance mode, damping other modes of instability.

Info:

Periodical:

Advanced Materials Research (Volumes 204-210)

Edited by:

Helen Zhang, Gang Shen and David Jin

Pages:

1158-1161

DOI:

10.4028/www.scientific.net/AMR.204-210.1158

Citation:

G. N. Li et al., "The Nonlinearity during Start-Oscillation of Thermo-Acoustic Instability in Rijke-Type Combustor", Advanced Materials Research, Vols. 204-210, pp. 1158-1161, 2011

Online since:

February 2011

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.