In this work, the application of Helmholtz resonators for damping low-frequency pulsations in gas turbine combustion chambers is discussed. We present a nonlinear model for predicting the acoustic response of resonators including the effect of purging air. Atmospheric experiments are used to validate the model, which is employed to design a resonator arrangement for damping low-frequency pulsations in an ALSTOM GT11N2 gas turbine. The predicted damper impedances are used as the boundary condition in the three-dimensional analysis of the combustion chamber. The suggested arrangement leads to a significant extension of the low-pulsation operating regime of the engine.
On the Use of Helmholtz Resonators for Damping Acoustic Pulsations in Industrial Gas Turbines
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, New Orleans, LA, June 4–7, 2001; Paper 01-GT-039. Manuscript received by IGTI, December 2000, final revision, March 2001. Associate Editor: R. Natole.
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Bellucci, V., Flohr, P., Paschereit, C. O., and Magni, F. (June 7, 2004). "On the Use of Helmholtz Resonators for Damping Acoustic Pulsations in Industrial Gas Turbines ." ASME. J. Eng. Gas Turbines Power. April 2004; 126(2): 271–275. https://doi.org/10.1115/1.1473152
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