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Importance of Nonreactive Burner Acoustic Admittance on Thermo-Acoustic Instability

Published online by Cambridge University Press:  05 May 2011

Tzeng-Yuan Chen  and
Chien-Pang Chen
Tzeng-Yuan Chen*
Affiliation:
Department of Aerospace Engineering, Tamkang University, Taipei County, Taiwan 251, R.O.C.
Chien-Pang Chen*
Affiliation:
Department of Aerospace Engineering, Tamkang University, Taipei County, Taiwan 251, R.O.C.
*
*Associate Professor, Corresponding Author
**Graduate Research Assistant
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Abstract

The importance of nonreactive acoustic admittance at a burner exit plane on the flame-driving characteristic was discussed using the measured phase difference between the velocity and pressure oscillations, and the acoustic wave structure inside the duct. Also, the flame-driving characteristics were investigated by flame radiation measurements, and results were compared with those obtained previously from admittance studies. Results show that the comparisons are in good agreement. Also, the flame-driving characteristics are closed related to the acoustic wave structure at the burner exit plane, and could be qualitatively predicted by knowing the imaginary part of nonreactive burner acoustic admittance.

Keywords

Acoustic admittanceFlame radiation measurementCombustion instability
Type
Articles
Information
Journal of Mechanics , Volume 16 , Issue 4 , December 2000 , pp. 197 - 201
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2000

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References

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