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Journal Articles

Regression-Based Modeling of a Fleet of Gas Turbine Engines for Performance Trending

S. Borguet, O. Léonard, P. Dewallef

J. Eng. Gas Turbines Power. February 2016, 138(2): 021201.

Paper No: GTP-15-1273

DOI: https://doi.org/10.1115/1.4031253

Published Online: September 1, 2015

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Topics: Engines, Modeling, Sensors, Flight, Gas turbines

Proceedings Papers

Regression-Based Modelling of a Fleet of Gas Turbine Engines for Performance Trending

S. Borguet, O. Léonard, P. Dewallef

Proc. ASME. GT2015, Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy; Honors and Awards, V006T05A004, June 15–19, 2015

Paper No: GT2015-42330

DOI: https://doi.org/10.1115/GT2015-42330

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Topics: Gas turbines, Modeling, Engines

Proceedings Papers

Design Method for Subsonic and Transonic Cascade With Prescribed Mach Number Distribution

O. Léonard, R. A. Van Den Braembussche

Proc. ASME. GT1991, Volume 1: Turbomachinery, V001T01A005, June 3–6, 1991

Paper No: 91-GT-018

DOI: https://doi.org/10.1115/91-GT-018

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Topics: Cascades (Fluid dynamics), Design methodology, Mach number, Blades, Flow (Dynamics), Geometry, Pressure, Design, Boundary-value problems, Shapes

Proceedings Papers

Inverse Design of Compressor and Turbine Blades at Transonic Flow Conditions

O. Léonard, R. A. Van den Braembussche

Proc. ASME. GT1992, Volume 1: Turbomachinery, V001T01A135, June 1–4, 1992

Paper No: 92-GT-430

DOI: https://doi.org/10.1115/92-GT-430

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Topics: Compressors, Design, Transonic flow, Turbine blades, Blades, Shapes, Boundary layers, Cascades (Fluid dynamics), Computational methods, Degrees of freedom

Proceedings Papers

Analysis Versus Synthesis for Trending of Gas-Path Measurement Time Series

S. Borguet, O. Léonard, P. Dewallef

Proc. ASME. GT2014, Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy, V006T06A012, June 16–20, 2014

Paper No: GT2014-26029

DOI: https://doi.org/10.1115/GT2014-26029

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Topics: Time series, Signals, Filters, Noise (Sound), Engines, Delays, Filtration, Flaw detection, Low-pass filters, Shapes

Journal Articles

Analysis Versus Synthesis for Trending of Gas-Path Measurement Time Series

S. Borguet, O. Léonard, P. Dewallef

J. Eng. Gas Turbines Power. February 2015, 137(2): 022603.

Paper No: GTP-14-1389

DOI: https://doi.org/10.1115/1.4028385

Published Online: September 16, 2014

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Topics: Filters, Signals

Journal Articles

Constrained Sparse Estimation for Improved Fault Isolation

S. Borguet, O. Léonard

J. Eng. Gas Turbines Power. December 2011, 133(12): 121602.

DOI: https://doi.org/10.1115/1.4004013

Published Online: September 1, 2011

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Topics: Algorithms, Engines, Flow (Dynamics), Quadratic programming, Compressors, Stators

Journal Articles

Toward a High Order Throughflow––Investigation of the Nonlinear Harmonic Method Coupled With an Immersed Boundary Method for the Modeling of the Circumferential Stresses

J. P. Thomas, O. Léonard

J. Turbomach. January 2012, 134(1): 011017.

DOI: https://doi.org/10.1115/1.4003256

Published Online: May 31, 2011

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Topics: Blades, Cylinders, Flow (Dynamics), Fourier series, Hoop stress, Modeling, Turbomachinery, Computation

Journal Articles

A Study on Engine Health Monitoring in the Frequency Domain

S. Borguet, M. Henriksson, T. McKelvey, O. Léonard

J. Eng. Gas Turbines Power. August 2011, 133(8): 081604.

DOI: https://doi.org/10.1115/1.4002832

Published Online: April 8, 2011

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Topics: Engines, Signals, Flow (Dynamics), Transients (Dynamics)

Journal Articles

A Sparse Estimation Approach to Fault Isolation

S. Borguet, O. Léonard

J. Eng. Gas Turbines Power. February 2010, 132(2): 021601.

DOI: https://doi.org/10.1115/1.3156815

Published Online: November 4, 2009

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Topics: Algorithms, Engines, Flow (Dynamics), Quadratic programming, Jet engines, Turbofans

Journal Articles

On the Role of the Deterministic and Circumferential Stresses in Throughflow Calculations

J.-F. Simon, J. P. Thomas, O. Léonard

J. Turbomach. July 2009, 131(3): 031019.

DOI: https://doi.org/10.1115/1.2992514

Published Online: April 20, 2009

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Topics: Blades, Computation, Entropy, Flow (Dynamics), Hoop stress, Stress, Simulation, Compressors, Navier-Stokes equations, Wakes

Journal Articles

A Generalized Likelihood Ratio Test for Adaptive Gas Turbine Performance Monitoring

S. Borguet, O. Léonard

J. Eng. Gas Turbines Power. January 2009, 131(1): 011601.

DOI: https://doi.org/10.1115/1.2967493

Published Online: October 13, 2008

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Topics: Algorithms, Engines, Gas turbines, Kalman filters, Wear

Journal Articles

Ten Years of Experience With a Small Jet Engine as a Support for Education

O. Léonard, J. P. Thomas, S. Borguet

J. Eng. Gas Turbines Power. January 2009, 131(1): 012303.

DOI: https://doi.org/10.1115/1.2967487

Published Online: October 10, 2008

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Topics: Compressors, Engines, Flow (Dynamics), Fuels, Jet engines, Nozzles, Pressure, Turbines, Thrust, Students

Journal Articles

A Way to Deal With Model-Plant Mismatch for a Reliable Diagnosis in Transient Operation

S. Borguet, P. Dewallef, O. Léonard

J. Eng. Gas Turbines Power. May 2008, 130(3): 031601.

DOI: https://doi.org/10.1115/1.2833491

Published Online: March 26, 2008

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Topics: Engines, Transients (Dynamics), Kalman filters, Errors, Algorithms

Journal Articles

A Sensor-Fault-Tolerant Diagnosis Tool Based on a Quadratic Programming Approach

S. Borguet, O. Léonard

J. Eng. Gas Turbines Power. March 2008, 130(2): 021605.

DOI: https://doi.org/10.1115/1.2772637

Published Online: March 5, 2008

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Topics: Sensors, Engines, Kalman filters, Algorithms

Journal Articles

Combining Classification Techniques With Kalman Filters for Aircraft Engine Diagnostics

P. Dewallef, C. Romessis, O. Léonard, K. Mathioudakis

J. Eng. Gas Turbines Power. April 2006, 128(2): 281–287.

DOI: https://doi.org/10.1115/1.2056507

Published Online: March 1, 2004

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Topics: Kalman filters, Algorithms