Premixed gas turbine combustors operated at very lean conditions are prone to thermoacoustic instabilities. Thermoacoustic instabilities have negative effects on the operability of the combustion chamber. The prevention of thermoacoustic instabilities is a major design goal of the gas turbine combustor system as well as its control system. An appropriate real-time model helps the design of effective control algorithms for the prevention of thermoacoustic instabilities. This paper presents a black-box real-time modelling approach for thermoacoustic instabilities simulation using a Gaussian-Process. A Gaussian Process is a stochastic process that can approximate arbitrary functions, similar to Neural Networks, but with the advantage that it can be implemented and tuned in a more straightforward manner since a theoretical framework exists for the optimization of the hyperparameters influencing the process. The Gaussian Process can be trained in a fast and straight-forward manner. The trained Gaussian Process has been proven to be very efficient numerically, which enables it to be used in a real-time simulation environment. The real-time gas turbine model is to be used in the development of control algorithms that allow for low-NOx and robust operation of the gas turbine in conjunction with low acoustic pulsation levels. Verification on a gas turbine demonstrated the high accuracy of this modeling approach for a wide range of operating conditions. Moreover, it was shown that a Gaussian Process trained with data of one engine correctly reproduced acoustic pulsation behaviour of another engine.
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ASME Turbo Expo 2007: Power for Land, Sea, and Air
May 14–17, 2007
Montreal, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4791-8
PROCEEDINGS PAPER
Real-Time Modelling of the Thermoacoustic Dynamics of a Gas Turbine Using a Gaussian Process
Ernst Schneider,
Ernst Schneider
University of Stuttgart, Stuttgart, Germany
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Stephan Staudacher,
Stephan Staudacher
University of Stuttgart, Stuttgart, Germany
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Bruno Schuermans,
Bruno Schuermans
ALSTOM, Baden, Switzerland
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Thiemo Meeuwissen
Thiemo Meeuwissen
ALSTOM, Baden, Switzerland
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Ernst Schneider
University of Stuttgart, Stuttgart, Germany
Stephan Staudacher
University of Stuttgart, Stuttgart, Germany
Bruno Schuermans
ALSTOM, Baden, Switzerland
Haiwen Ye
ALSTOM, Baden, Switzerland
Thiemo Meeuwissen
ALSTOM, Baden, Switzerland
Paper No:
GT2007-27468, pp. 323-332; 10 pages
Published Online:
March 10, 2009
Citation
Schneider, E, Staudacher, S, Schuermans, B, Ye, H, & Meeuwissen, T. "Real-Time Modelling of the Thermoacoustic Dynamics of a Gas Turbine Using a Gaussian Process." Proceedings of the ASME Turbo Expo 2007: Power for Land, Sea, and Air. Volume 2: Turbo Expo 2007. Montreal, Canada. May 14–17, 2007. pp. 323-332. ASME. https://doi.org/10.1115/GT2007-27468
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