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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuels

Acoustic Resonances of an Industrial Gas Turbine Combustion System

[+] Author and Article Information
S. Hubbard, A. P. Dowling

Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK

J. Eng. Gas Turbines Power 123(4), 766-773 (Oct 01, 2000) (8 pages) doi:10.1115/1.1370975 History: Received October 01, 1999; Revised October 01, 2000
Copyright © 2001 by ASME
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References

Figures

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Schematic of wave amplitudes, and the sections of the gas turbine
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Frequencies of oscillation, fixed flame model; –stable, [[dashed_line]]unstable
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Frequencies of oscillation, fixed flame model with entropy diffusion; –stable, [[dashed_line]]unstable
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Frequencies of oscillation, derived flame model with entropy diffusion; –stable, [[dashed_line]]unstable
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Pressure mode shape, derived flame model with entropy diffusion
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Frequencies of oscillation and their growth rates, with a Helmholtz resonator, for flame model derived in Section 5, with entropy diffusion before combustor exit. Combustor temperature of 2000 K. Neck SPL=169 db,o:r0=0 mm,x:r0=5,10,20, 50 mm, +:r0=100 mm.
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Frequencies of oscillation with a Helmholtz resonator connected to the plenum, derived flame model with entropy diffusion –stable, [[dashed_line]]unstable
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Frequencies of oscillation, fluctuating fuel supply. Derived flame model with diffused entropy, at a combustor temperature of 1900 K.

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