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Juan Manuel Gallardo
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Journal Articles

Numerical Study of Low Engine Order Excitations Due to Manufacturing Variability Part II: An Efficient Approach for Stochastic Studies

Juan Manuel Gallardo, Óscar Pérez Escobar
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2025, 147(6): 061004.
Paper No: GTP-24-1508
https://doi.org/10.1115/1.4066538
Published Online: November 14, 2024
View Article titled, Numerical Study of Low Engine Order Excitations Due to Manufacturing Variability Part II: An Efficient Approach for Stochastic Studies
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Topics: Airfoils, Blades, Computational fluid dynamics, Electromagnetic scattering, Engines, Excitation, Flow (Dynamics), Geometry, Manufacturing, Simulation
Journal Articles

Numerical Study of Low Engine Order Excitations Due to Manufacturing Variability Part I: Characterization of the Geometric Scatter and Its Effect on Forced Response

Óscar Pérez Escobar, Vicente Timón, Juan Manuel Gallardo
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2025, 147(6): 061003.
Paper No: GTP-24-1524
https://doi.org/10.1115/1.4066585
Published Online: November 14, 2024
View Article titled, Numerical Study of Low Engine Order Excitations Due to Manufacturing Variability Part I: Characterization of the Geometric Scatter and Its Effect on Forced Response
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Topics: Airfoils, Electromagnetic scattering, Engines, Geometry, Manufacturing, Vibration, Rotors, Excitation, Design, Blades
Proceedings Papers

Numerical Study of Low Engine Order Excitations due to Manufacturing Variability Part 2: An Efficient Approach for Stochastic Studies

Juan Manuel Gallardo, Óscar Pérez Escobar
Proc. ASME. GT2024, Volume 10A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing, V10AT21A010, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-126570
https://doi.org/10.1115/GT2024-126570
View Paper titled, Numerical Study of Low Engine Order Excitations due to Manufacturing Variability Part 2: An Efficient Approach for Stochastic Studies
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Topics: Engines, Excitation, Geometry, Manufacturing, Electromagnetic scattering, Flow (Dynamics), Engineering simulation, Simulation, Airfoils, Blades
Proceedings Papers

Numerical Study of Low Engine Order Excitations due to Manufacturing Variability Part 1: Characterization of the Geometric Scatter and its Effect on Forced Response

Óscar Pérez Escobar, Vicente Timón, Juan Manuel Gallardo
Proc. ASME. GT2024, Volume 10A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing, V10AT21A011, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-126586
https://doi.org/10.1115/GT2024-126586
View Paper titled, Numerical Study of Low Engine Order Excitations due to Manufacturing Variability Part 1: Characterization of the Geometric Scatter and its Effect on Forced Response
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Topics: Electromagnetic scattering, Engines, Excitation, Geometry, Manufacturing, Airfoils, Aerodynamics, Blades, Aeroelasticity, Computational fluid dynamics
Journal Articles

Experimental Research Into Aeroelastic Phenomena in Turbine Rotor Blades Inside ARIAS EU Project

Juan Manuel Gallardo, Oscar Bermejo, Julen Hernández, Gadea García, Jon Gallego, Daniel Knappett, Vsevolod Kharyton, Mike Wurl, Roque Corral
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2024, 146(7): 071009.
Paper No: TURBO-23-1308
https://doi.org/10.1115/1.4065621
Published Online: June 10, 2024
View Article titled, Experimental Research Into Aeroelastic Phenomena in Turbine Rotor Blades Inside ARIAS EU Project
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Topics: Blades, Dampers, Design, Flutter (Aerodynamics), Rotors, Turbines, Vibration, Signals, Pressure, Excitation
Journal Articles

A Conceptual Model for the Flutter Mechanism in Interlocked Turbine Blades

Juan Manuel Gallardo, Óscar Pérez Escobar
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2023, 145(11): 111015.
Paper No: GTP-23-1314
https://doi.org/10.1115/1.4063313
Published Online: September 29, 2023
View Article titled, A Conceptual Model for the Flutter Mechanism in Interlocked Turbine Blades
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Topics: Blades, Flutter (Aerodynamics), Torsion, Finite element methods, Damping, Stability, Mode shapes, Turbines
Proceedings Papers

Analytical, Numerical and Experimental Study of Flutter in a Realistic Labyrinth Seal

Oscar Bermejo, Juan Manuel Gallardo, Adrian Sotillo, Arnau Altuna, Roberto Alonso, Andoni Puente
Proc. ASME. GT2023, Volume 13C: Turbomachinery — Deposition, Erosion, Fouling, and Icing; Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V13CT32A016, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101907
https://doi.org/10.1115/GT2023-101907
View Paper titled, Analytical, Numerical and Experimental Study of Flutter in a Realistic Labyrinth Seal
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Topics: Flutter (Aerodynamics)
Proceedings Papers

A Conceptual Model for the Flutter Mechanism in Interlocked Turbine Blades

Juan Manuel Gallardo, Óscar Pérez Escobar
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT21A004, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101677
https://doi.org/10.1115/GT2023-101677
View Paper titled, A Conceptual Model for the Flutter Mechanism in Interlocked Turbine Blades
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Topics: Flutter (Aerodynamics), Turbine blades
Journal Articles

Study of the Effect of the Scatter of Acoustic Modes on Turbine Flutter

Juan Manuel Gallardo, Adrián Sotillo, Óscar Bermejo
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2019, 141(10): 101010.
Paper No: TURBO-18-1306
https://doi.org/10.1115/1.4043909
Published Online: September 30, 2019
View Article titled, Study of the Effect of the Scatter of Acoustic Modes on Turbine Flutter
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Topics: Acoustics, Flutter (Aerodynamics), Waves, Simulation, Reflection, Electromagnetic scattering, Turbines
Proceedings Papers

Study of the Impact of Multi-Row Interaction on Flutter Analysis for a Representative LPT Geometry

Adrian Sotillo, Juan Manuel Gallardo
Proc. ASME. GT2018, Volume 7C: Structures and Dynamics, V07CT36A011, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75762
https://doi.org/10.1115/GT2018-75762
View Paper titled, Study of the Impact of Multi-Row Interaction on Flutter Analysis for a Representative LPT Geometry
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Topics: Flutter (Aerodynamics), Geometry, Blades, Acoustics, Spin (Aerodynamics), Spinning (Textile), Computation, Computational fluid dynamics, Damping, Engineering simulation
Proceedings Papers

Conceptual Analysis of the Non-Linear Forced Response of Aerodynamically Unstable Bladed-Discs

Roque Corral, Juan Manuel Gallardo, Rahul Ivaturi
Proc. ASME. GT2013, Volume 7A: Structures and Dynamics, V07AT32A001, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94851
https://doi.org/10.1115/GT2013-94851
View Paper titled, Conceptual Analysis of the Non-Linear Forced Response of Aerodynamically Unstable Bladed-Discs
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Topics: Disks, Excitation, Friction, Vibration, Flutter (Aerodynamics), Blades, Energy dissipation, Engines, Limit cycles, Springs
Proceedings Papers

Non-Linear Dynamics of Multi-Mode Unstable Bladed-Disks: Part I—Description of a Canonical Model and Phenomenological Results

Roque Corral, Juan Manuel Gallardo
Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 1331-1341, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45983
https://doi.org/10.1115/GT2011-45983
View Paper titled, Non-Linear Dynamics of Multi-Mode Unstable Bladed-Disks: Part I—Description of a Canonical Model and Phenomenological Results
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Topics: Disks, Nonlinear dynamics, Dynamics (Mechanics), Blades, Rotors, Airfoils, Dry friction, Pressure, Steady state, Traveling waves
Proceedings Papers

Verification of the Vibration Amplitude Prediction of Self-Excited LPT Rotor Blades Using a Fully Coupled Time-Domain Non-Linear Method and Experimental Data

Roque Corral, Juan Manuel Gallardo
Proc. ASME. GT2008, Volume 5: Structures and Dynamics, Parts A and B, 835-847, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-51416
https://doi.org/10.1115/GT2008-51416
View Paper titled, Verification of the Vibration Amplitude Prediction of Self-Excited LPT Rotor Blades Using a Fully Coupled Time-Domain Non-Linear Method and Experimental Data
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Topics: Blades, Rotors, Vibration, Airfoils, Disks, Dry friction, Pressure, Turbines, Aerodynamics, Energy budget (Physics)
Proceedings Papers

A Conceptual Flutter Analysis of a Packet of Vanes Using a Mass-Spring Model

Roque Corral, Juan Manuel Gallardo, Carlos Martel
Proc. ASME. GT2007, Volume 5: Turbo Expo 2007, 599-607, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27090
https://doi.org/10.1115/GT2007-27090
View Paper titled, A Conceptual Flutter Analysis of a Packet of Vanes Using a Mass-Spring Model
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Topics: Flutter (Aerodynamics), Springs, Mode shapes, Aerodynamics, Airfoils, Damping, Fluid-dynamic forces, Stiffness, Approximation, Dynamics (Mechanics)
Journal Articles

A Conceptual Flutter Analysis of a Packet of Vanes Using a Mass-Spring Model

Roque Corral, Juan Manuel Gallardo, Carlos Martel
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2009, 131(2): 021016.
https://doi.org/10.1115/1.2952364
Published Online: January 29, 2009
View Article titled, A Conceptual Flutter Analysis of a Packet of Vanes Using a Mass-Spring Model
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Topics: Aerodynamics, Damping, Flutter (Aerodynamics), Springs, Stators
Proceedings Papers

Linear Stability Analysis of LPT Rotor Packets: Part II — Three-Dimensional Results and Mistuning Effects

Roque Corral, Juan Manuel Gallardo, Carlos Vasco
Proc. ASME. GT2004, Volume 6: Turbo Expo 2004, 563-572, June 14–17, 2004
Publisher: American Society of Mechanical Engineers
Paper No: GT2004-54120
https://doi.org/10.1115/GT2004-54120
View Paper titled, Linear Stability Analysis of LPT Rotor Packets: Part II — Three-Dimensional Results and Mistuning Effects
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Topics: Rotors, Stability, Disks, Damping, Airfoils, Accounting, Blades, Cantilevers, Design, Flutter (Aerodynamics)
Proceedings Papers

A Methodology for the Vibration Amplitude Prediction of Self-Excited Rotors Based on Dimensional Analysis

Roque Corral, Juan Manuel Gallardo
Proc. ASME. GT2006, Volume 5: Marine; Microturbines and Small Turbomachinery; Oil and Gas Applications; Structures and Dynamics, Parts A and B, 1101-1113, May 8–11, 2006
Publisher: American Society of Mechanical Engineers
Paper No: GT2006-90668
https://doi.org/10.1115/GT2006-90668
View Paper titled, A Methodology for the Vibration Amplitude Prediction of Self-Excited Rotors Based on Dimensional Analysis
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Topics: Dimensional analysis, Rotors, Vibration, Blades, Airfoils, Aerodynamics, Disks, Dry friction, Excitation, Friction
Journal Articles

Aeroelastic Stability of Welded-in-Pair Low Pressure Turbine Rotor Blades: A Comparative Study Using Linear Methods

Roque Corral, Juan Manuel Gallardo, Carlos Vasco
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2007, 129(1): 72–83.
https://doi.org/10.1115/1.2366512
Published Online: March 1, 2004
View Article titled, Aeroelastic Stability of Welded-in-Pair Low Pressure Turbine Rotor Blades: A Comparative Study Using Linear Methods
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Topics: Airfoils, Blades, Damping, Disks, Pressure, Rotors, Stability, Flutter (Aerodynamics), Turbines, Torsion