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TECHNICAL PAPERS

Thermoacoustic Modeling of a Gas Turbine Combustor Equipped With Acoustic Dampers

[+] Author and Article Information
Valter Bellucci, Bruno Schuermans, Dariusz Nowak, Peter Flohr

ALSTOM (Switzerland) Ltd, CH-5405 Baden-Dättwil, Switzerland

Christian Oliver Paschereit

Technical University of Berlin, D-10623 Berlin, Germany

J. Turbomach 127(2), 372-379 (May 05, 2005) (8 pages) doi:10.1115/1.1791284 History: Received October 01, 2003; Revised March 01, 2004; Online May 05, 2005
Copyright © 2005 by ASME
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References

Figures

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GT11N2 ALSTOM gas turbine
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Thermoacoustic network elements
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Example of combustor mode (left) and hood mode (right)
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Impedance tube test rig
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Magnitude of burner transfer function terms. Dashed line: impedance tube measurements; solid line: FEM simulation
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FEM model (left) and example of the acoustic mode (right) of the combustion system
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A comparison of combustion system eigenfrequencies: FEM vs network results
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Combustion test facility for flame transfer function measurements
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Flame transfer function magnitude. Solid line: measurements; dashed line: analytical model.
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Flame transfer function phase. Solid line: measurements; dashed line: analytical model.
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GT11N2 cooled Helmholtz damper
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Reflection coefficient of GT11N2 cooled resonator. Solid line: analytical model; triangles: impedance lab measurements.
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GT11N2 spectrum without resonators at peak frequency: engine vs TA3 network.
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GT11N2 spectrum with resonators at peak frequency: engine vs TA3 network.

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