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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuels

Online Combustor Stability Margin Assessment Using Dynamic Pressure Data

[+] Author and Article Information
Tim Lieuwen

School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0150e-mail: tim.lieuwen@aerospace.gatech.edu

J. Eng. Gas Turbines Power 127(3), 478-482 (Jun 24, 2005) (5 pages) doi:10.1115/1.1850493 History: Received October 01, 2003; Revised March 01, 2004; Online June 24, 2005
Copyright © 2005 by ASME
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References

Lee,  J., and Santavicca,  D., 2003, “Experimental Diagnostics for the Study of Combustion Instabilities in Lean, Premixed Combustors,” J. Propul. Power, 19, pp. 735–750.
Richards,  G., Straub,  D., and Robey,  E., 2003, “Passive Control of Combustion Dynamics in Stationary Gas Turbines,” J. Propul. Power, 19, pp. 795–810.
Mongia,  H., Held,  T., Hsiao,  G., and Pandalai,  R., 2003, “Challenges and Progress in Controlling Dynamics in Gas Turbine Combustors,” J. Propul. Power, 19, pp. 822–829.
Lieuwen, T., 2004, “Method for Monitoring Combustion Dynamics Stability Margin,” Provisional Patent, filed Feb. 6.
Johnson, C. E., Neumeier, Y., Lieuwen, T., and Zinn, B. T., 2000, “Experimental Determination of the Stability Margin of a Combustor Using Exhaust Flow and Fuel Injection Rate Modulations,” Proceedings of the Combustion Institute, Vol. 28, pp. 757–764.
Zinn, B. T., and Powell, E. A., 1970, “Nonlinear Combustion Instabilities in Liquid Propellant Rocket Engines,” Proceedings of the Combustion Institute, Vol. 13, The Combustion Institute, Pittsburgh, PA.
Culick,  F. E. C., 1971, “Nonlinear Growth and Limiting Amplitude of Acoustic Oscillations in Combustion Chambers,” Combust. Sci. Technol., 3, pp. 1–16.
Gardiner, C. W., 1997, Handbook of Stochastic Methods, Springer-Verlag, New York.
Morse, P. M., and Feshbach, H., 1953, Methods of Theoretical Physics, Vol. 1, McGraw-Hill, New York.
Lieuwen, T., Neumeier, Y., Rajaram, R., and Nair, S., 2003, “Measurements of Incoherent Acoustic Wave Scattering From Turbulent Premixed Flames,” Proceedings of the Combustion Institute, Vol. 29, The Combustion Institute, Pittsburgh, PA., pp. 1809–1815.
Lieuwen, T., and Banaszuk, A., 2002, “Background Noise Effects on Combustor Stability,” ASME Paper No. GT-2002-30062.
Burnley, V. S., 1996, “Nonlinear Combustion Instabilities and Stochastic Sources,” Ph.D. thesis, California Institute of Technology.
Clavin,  P., Kim,  J. S., and Williams,  F. A., 1994, “Turbulence Induced Noise Effects on High-Frequency Combustion Instabilities,” Combust. Sci. Technol., 96, pp. 61–85.
Lieuwen,  T., Torres,  H., Johnson,  C., and Zinn,  B. T., 2001, “A Mechanism for Combustion Instabilities in Premixed Gas Turbine Combustors,” J. Eng. Gas Turbines Power, 123, pp. 182–190.
Lieuwen,  T., 2002, “Experimental Investigation of Limit Cycle Oscillations in an Unstable Gas Turbine Combustor,” J. Propul. Power, 18, pp. 61–67.

Figures

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Variation of dynamic pressure amplitude in combustor with premixer velocity
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Dependence of autocorrelation of raw acoustic pressure data measured under stable (top, u=27 m/s) and unstable (bottom, u=21 m/s) conditions
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Time dependence of the autocorrelation, Ci(t), (○) and Hilbert transform of the autocorrelation (−). Raw data bandpass filtered about the 630 Hz mode with a fourth-orderButterworth filter, with a bandwidth set to 10% of the center frequency (u=33.9 m/s).
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Dependence of damping estimate, ζ, upon bandpass filter width (fcenter=630 Hz,u=21.9 m/s; four cycles of data were used for an estimate)
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Fourier transform of combustor pressure (u=25.9 m/s)
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Dependence of 430 (□) and 630 (*) Hz mode amplitude upon premixer velocity
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Dependence of 430 Hz mode pressure amplitude (▪) and damping coefficient (○) upon premixer velocity
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Dependence of 630 Hz mode pressure amplitude (▪) and damping coefficient (○) upon premixer velocity
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Dependence of 285 Hz mode pressure amplitude (▪) and damping coefficient (○) upon premixer velocity
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Dependence of 730 Hz mode pressure amplitude (▪) and damping coefficient (○) upon premixer velocity
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Dependence of 570 Hz mode pressure amplitude (▪) and damping coefficient (○) upon premixer velocity
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Dependence of 132 Hz mode pressure amplitude (▪) and damping coefficient (○) upon premixer velocity

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