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TECHNICAL PAPERS

Thermoacoustically-Based Combustion Oscillation in a Gas Turbine—A Brief Note

[+] Author and Article Information
Frantisek L. Eisinger, Robert E. Sullivan

Foster Wheeler Power Group, Inc., Clinton, NJ 08809-4000

J. Pressure Vessel Technol 125(4), 454-459 (Nov 04, 2003) (6 pages) doi:10.1115/1.1613303 History: Received July 03, 2002; Revised May 19, 2003; Online November 04, 2003
Copyright © 2003 by ASME
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References

Figures

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Line diagram of Sondhauss tube with acoustic oscillating pressure superimposed
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Line diagram of Rijke tube with acoustic oscillating pressure superimposed
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Stability diagram defining onset of large thermoacoustic oscillations; shape of curve after Rott (1980)
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Schematic arrangement of burner and combustion chamber within gas turbine
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Typical frequency spectrum of pressure pulsation inside combustion chamber
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Normalized acoustic pressure mode shapes for original geometry (a), (b) Rijke modes representing combined cold and hot regions, (c), (d) combustion chamber modes
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Stability diagram of thermoacoustic vibration for combustion chamber/burner system in original turbine configuration. Shown are results for Mode 1 and Mode 2 instability.
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Normalized acoustic pressure mode shapes for modified geometry of burner air tube. Shown are Rijke modes (Mode 1 and Mode 2) of combined system.
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Stability diagram of thermoacoustic vibration for combustion chamber/burner system in modified turbine configuration. Shown are results for Mode 1 and Mode 2 stable modes.

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