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TECHNICAL PAPERS: Internal Combustion Engines: Flow, heat transfer, and combustion

A Mechanism of Combustion Instability in Lean Premixed Gas Turbine Combustors

[+] Author and Article Information
T. Lieuwen, H. Torres, C. Johnson, B. T. Zinn

Schools of Aerospace and Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150

J. Eng. Gas Turbines Power 123(1), 182-189 (Apr 02, 2000) (8 pages) doi:10.1115/1.1339002 History: Received March 09, 1999; Revised April 02, 2000
Copyright © 2001 by ASME
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References

Figures

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Dependence of α on the flame Strouhal number, St=fLflame/u for three different assumed flame shapes
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Dependence of unsteady pressure amplitudes measured in a DOE combustor 3 and its predicted linear stability limits upon τconvect/T
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Dependence of unsteady pressure amplitudes measured in a Penn State combustor 2 and its predicted linear stability limits upon τconvect/T
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Dependence of unsteady pressure amplitudes measured in a Georgia Tech combustor and its predicted linear stability limits upon τconvect/T
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Dependence of the pressure amplitudes of the 430 and 630 Hz modes, measured at Georgia Tech, upon the mean inlet velocity
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Schematic of a typical LP combustor
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Schematic of the feedback loop possibly responsible for LP combustion instabilities
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Dependence of the response of the WSR reaction rate to ϕ perturbations in its inlet flow upon the mean value of ϕ
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Schematic showing the time evolution of disturbances responsible for a combustion instability
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Dependence of instability regions (hatched regions) upon τconv,eff/T for several different combustor configurations

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