Thermoacoustic Modeling of a Gas Turbine Using Transfer Functions Measured Under Full Engine Pressure
Author:
Schuermans Bruno1, Guethe Felix1, Pennell Douglas1, Guyot Daniel2, Paschereit Christian Oliver2
Affiliation:
1. Alstom (Switzerland) Ltd., CH-5405 Baden, Switzerland 2. Hermann-Föttinger-Institute, Technische Universität Berlin, 10623 Berlin, Germany
Abstract
Thermoacoustic transfer functions of a full-scale gas turbine burner operating under full engine pressure have been measured. The excitation of the high-pressure test facility was done using a siren that modulated a part of the combustion airflow. Pulsation probes have been used to record the acoustic response of the system to this excitation. In addition, the flame’s luminescence response was measured by multiple photomultiplier probes and a light spectrometer. Three techniques to obtain the thermoacoustic transfer function are proposed and employed: two acoustic-optical techniques and a purely acoustic technique. The first acoustical-optical technique uses one single optical signal capturing the chemiluminescence intensity of the flame as a measure for the heat release in the flame. This technique only works if heat release fluctuations in the flame have only one generic source, e.g., equivalence ratio or mass flow fluctuations. The second acoustic-optical technique makes use of the different response of the flame’s luminescence at different optical wavelengths bands to acoustic excitation. It also works, if the heat release fluctuations have two contributions, e.g., equivalence ratio and mass flow fluctuation. For the purely acoustic technique, a new method was developed in order to obtain the flame transfer function, burner transfer function, and flame source term from only three pressure transducer signals. The purely acoustic method could be validated by the results obtained from the acoustic-optical techniques. The acoustic and acoustic-optical methods have been compared and a discussion on the benefits and limitations of each is given. The measured transfer functions have been implemented into a nonlinear, three-dimensional, time domain network model of a gas turbine with an annular combustion chamber. The predicted pulsation behavior shows a good agreement with pulsation measurements on a field gas turbine.
Publisher
ASME International
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference14 articles.
1. Schuermans, B.
, 2003, “Modeling and Control of Thermoacoustic Instabilities,” Ph.D. thesis, No. 2800, EPFL Lausanne, Switzerland. http://library.epfl.ch/theses/?nr=2800 2. Schuermans, B., Bellucci, V., and Paschereit, C., 2003, “Thermoacoustic Modeling and Control of Multi Burner Combustion Systems,” ASME Paper No. 2003-GT-38688. 3. Bellucci, V., Schuermans, B., Nowak, D., Flohr, P., and Paschereit, O., 2004, “Thermoacoustic Modeling of a Gas Turbine Combustor Equipped With Acoustic Dampers,” ASME Paper No. GT2004-53977. 4. Bellucci, V., Nowak, D., Geng, W., and Steinbach, C., 2007, “Thermoacoustic Modeling and Control of Multi Burner Combustion Systems,” ASME Paper No. GT2007-27329. 5. Schuermans, B., Guethe, F., and Mohr, W., 2008, “Transfer Function Measurements for Technically Premixed Flames Using a Novel Optical Method,” ASME Paper No. GT2008-51500.
Cited by
71 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|