The influence of faults in the variable geometry (variable stator vanes) system of a multistage axial compressor on the performance of an industrial gas turbine is investigated. An experimental investigation has been conducted, by implanting such faults into an operating gas turbine. The faults examined are individual stator vane mistunings of different magnitudes and located at different stages. Fault identification is based on the aerothermodynamic measurement data and is achieved by employing two different techniques, namely adaptive performance modeling and monitoring the circumferential distribution of the turbine exit temperature. It is observed that the deviations of the health indices produced by an adaptive performance model form patterns that can be used to identify the faults. The patterns characterize both the kind and the magnitude of the fault. On the other hand, the turbine exit temperature profile is also influenced and its change can be used as additional information, to increase the confidence level of the diagnosis (contrary to customary practice, which expects temperatures profiles to reflect only burner or turbine malfunctions).
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January 2001
Technical Papers
Identifying Faults in the Variable Geometry System of a Gas Turbine Compressor
A. Tsalavoutas, Research Assistant,
A. Tsalavoutas, Research Assistant
Laboratory of Thermal Turbomachines, National Technical University of Athens, P.O. Box 64069, Athens 15710, Greece
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K. Mathioudakis, Associate Professor,
K. Mathioudakis, Associate Professor
Laboratory of Thermal Turbomachines, National Technical University of Athens, P.O. Box 64069, Athens 15710, Greece
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A. Stamatis, Research Associate,
A. Stamatis, Research Associate
Laboratory of Thermal Turbomachines, National Technical University of Athens, P.O. Box 64069, Athens 15710, Greece
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M. Smith, Principal Engineer,
M. Smith, Principal Engineer,
ABB Alstom Power UK Ltd., United Kingdom
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A. Tsalavoutas, Research Assistant
Laboratory of Thermal Turbomachines, National Technical University of Athens, P.O. Box 64069, Athens 15710, Greece
K. Mathioudakis, Associate Professor
Laboratory of Thermal Turbomachines, National Technical University of Athens, P.O. Box 64069, Athens 15710, Greece
A. Stamatis, Research Associate
Laboratory of Thermal Turbomachines, National Technical University of Athens, P.O. Box 64069, Athens 15710, Greece
M. Smith, Principal Engineer,
ABB Alstom Power UK Ltd., United Kingdom
Contributed by the International Gas Turbine Institute and presented at the 45th International Gas Turbine and Aeroengine Congress and Exhibition, Munich, Germany, May 8–11, 2000. Manuscript received by the International Gas Turbine Institute February 2000. Paper No. 2000-GT-33. Review Chair: D. Ballal.
J. Turbomach. Jan 2001, 123(1): 33-39 (7 pages)
Published Online: February 1, 2000
Article history
Received:
February 1, 2000
Citation
Tsalavoutas, A., Mathioudakis, K., Stamatis, A., and Smith, M. (February 1, 2000). "Identifying Faults in the Variable Geometry System of a Gas Turbine Compressor ." ASME. J. Turbomach. January 2001; 123(1): 33–39. https://doi.org/10.1115/1.1330267
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