TECHNICAL PAPERS: Gas Turbines: Controls, Diagnostics, and Instrumentation

Comparison of Linear and Nonlinear Gas Turbine Performance Diagnostics

[+] Author and Article Information
Ph. Kamboukos, K. Mathioudakis

Laboratory of Thermal Turbomachines, National Technical University of Athens, P.O. Box 64069, Athens 15710, Greece

J. Eng. Gas Turbines Power 127(1), 49-56 (Feb 09, 2005) (8 pages) doi:10.1115/1.1788688 History: Received October 01, 2002; Revised March 01, 2003; Online February 09, 2005
Copyright © 2004 by ASME
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Measurement deviation by linear and nonlinear model
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Difference of the predictions of nonlinear and linear models
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Nonlinearity indicator for different health parameters
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NLI for −2% deviation of health parameters
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Methods comparison for various fault situations
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Linear and nonlinear estimates of SW12 in function of fault level
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Euclidian distance of linear estimations from nonlinear for faults with 2% deviations
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Deterioration tracking for parameter SW26 using 400 operating points
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Health parameters at the final point of deterioration scenario
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Linear versus nonlinear model for different ways of derivative calculations
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Linear diagnoses with different ways of discretization for Jacobian matrix elements. Step: 1%.
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Linear diagnoses with different ways of discretization for Jacobian matrix elements. Step: 0.1%.
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Layout of a high bypass ratio partially mixed turbofan engine with station numbering




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