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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuel

Measurement of Transfer Matrices and Source Terms of Premixed Flames

[+] Author and Article Information
C. O. Paschereit, B. Schuermans, W. Polifke, O. Mattson

ALSTOM (Switzerland) Ltd., 5405 Baden, Switzerland

J. Eng. Gas Turbines Power 124(2), 239-247 (Mar 26, 2002) (9 pages) doi:10.1115/1.1383255 History: Received October 01, 1998; Revised March 01, 1999; Online March 26, 2002
Copyright © 2002 by ASME
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References

Figures

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Noise generation in combustors
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Example of modeling the combustor as a network of acoustic elements
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Acoustic elements relating Riemann-invariants or pressure and velocity fluctuatins of both sides of the element
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A burner modeled as an acoustic one-port
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A burner modeled as an acoustic two-port
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Representation of the flame as a sound source
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Experimental arrangement of the combustor
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Different contributions to the measured signal
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Coherence function Γxy between excitation signal and a microphone downstream of the burner for three different test states
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The transfer matrix of the burner/flame including the source term. Solid line: absolute value; dashed line: phase.
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The source term of the flame. Solid line: absolute value; dashed line: phase.
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Incident wave components fu (upstream of the burner) and gd (downstream of the burner). Forcing was from the upstream and downstream of the burner simultaneously.
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The transfer matrix of the flame without source term. Solid line: absolute value; dashed line: phase.

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