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Proceedings Papers

An Analysis of the Aeroelastic Behaviour of a Typical Fan-Blade With Emphasis on the Flutter Mechanism

J. G. Marshall, M. Imregun
Proc. ASME. GT1996, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, V005T14A009, June 10–13, 1996
Publisher: American Society of Mechanical Engineers
Paper No: 96-GT-078
https://doi.org/10.1115/96-GT-078
View Paper titled, An Analysis of the Aeroelastic Behaviour of a Typical Fan-Blade With Emphasis on the Flutter Mechanism
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Topics: Blades, Flutter (Aerodynamics), Aeroelasticity, Flow (Dynamics), Boundary-value problems, Fluid structure interaction, Fluids, Geometry, NASA, Rotors
Proceedings Papers

A Review of Analysis Techniques for Blade Tip-Timing Measurements

S. Heath, M. Imregun
Proc. ASME. GT1997, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T15A016, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-213
https://doi.org/10.1115/97-GT-213
View Paper titled, A Review of Analysis Techniques for Blade Tip-Timing Measurements
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Topics: Blades, Rotors, Vibration, Manufacturing, Probes, Disks, Engineering standards, Lasers, Steam turbines, Strain gages
Proceedings Papers

Predicted Influence of Intake Acoustics Upon Part-Speed Fan Flutter

J. W. Chew, M. Vahdati, M. Imregun
Proc. ASME. GT1998, Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery, V002T02A018, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-558
https://doi.org/10.1115/98-GT-558
View Paper titled, Predicted Influence of Intake Acoustics Upon Part-Speed Fan Flutter
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Topics: Acoustics, Flutter (Aerodynamics), Computational fluid dynamics, Acoustical properties, Aerodynamics, Approximation, Blades, Damping, Ducts, Engines
Proceedings Papers

A Resonance Tracking Algorithm for the Prediction of Turbine Forced Response With Friction Dampers

C. Bréard, J. S. Green, M. Vahdati, M. Imregun
Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A015, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0372
https://doi.org/10.1115/2000-GT-0372
View Paper titled, A Resonance Tracking Algorithm for the Prediction of Turbine Forced Response With Friction Dampers
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Topics: Algorithms, Dampers, Friction, Resonance, Turbines, Blades, Rotors, Computation, Excitation, Flow (Dynamics)
Proceedings Papers

An Integrated Time-Domain Aeroelasticity Model for the Prediction of Fan Forced Response Due to Inlet Distortion

C. Bréard, M. Vahdati, A. I. Sayma, M. Imregun
Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A016, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0373
https://doi.org/10.1115/2000-GT-0373
View Paper titled, An Integrated Time-Domain Aeroelasticity Model for the Prediction of Fan Forced Response Due to Inlet Distortion
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Topics: Aeroelasticity, Blades, Damping, Pressure, Boundary-value problems, Computation, Ducts, Fans, Finite element analysis, Fluctuations (Physics)
Proceedings Papers

Aerodynamics and Aeroelasticity of Impeller Vane Interactions in a High Pressure Ratio Centrifugal Compressor

S. K. Krishnababu, M. Imregun, J. S. Green, D. Hoyniak
Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 1201-1208, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22595
https://doi.org/10.1115/GT2010-22595
View Paper titled, Aerodynamics and Aeroelasticity of Impeller Vane Interactions in a High Pressure Ratio Centrifugal Compressor
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Topics: Aerodynamics, Aeroelasticity, Compressors, High pressure (Physics), Impellers, Diffusers, Annulus, Blades, Computation, Modeling
Journal Articles

Thermoelastic Modeling of Rotor Response With Shaft Rub

S. Ziaei-Rad, E. Kouchaki, M. Imregun
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. November 2010, 77(6): 061010.
https://doi.org/10.1115/1.4000904
Published Online: August 20, 2010
View Article titled, Thermoelastic Modeling of Rotor Response With Shaft Rub
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Topics: Heat transfer, Rotors, Vibration, Friction, Modeling, Heat
Journal Articles

A Numerical Study of Labyrinth Seal Flutter

L. di Mare, M. Imregun, J. S. Green, A. I. Sayma
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 2010, 132(2): 022201.
https://doi.org/10.1115/1.3204774
Published Online: April 6, 2010
View Article titled, A Numerical Study of Labyrinth Seal Flutter
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Topics: Cavities, Flow (Dynamics), Flutter (Aerodynamics), Pressure, Stability, Steady state, Damping, Aerodynamics, Finite element analysis
Proceedings Papers

Numerical Investigation of Labyrinth Seal Aeroelastic Stability

R. Phibel, L. di Mare, J. S. Green, M. Imregun
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 573-583, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-60017
https://doi.org/10.1115/GT2009-60017
View Paper titled, Numerical Investigation of Labyrinth Seal Aeroelastic Stability
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Topics: Stability, Cavities, Fluids, Acoustics, Aircraft engines, Boundary-value problems, Damping, Design, Engineering simulation, Flow (Dynamics)
Journal Articles

Parameters Identification for Nonlinear Dynamic Systems Via Genetic Algorithm Optimization

A. C. Gondhalekar, E. P. Petrov, M. Imregun
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research Papers
J. Comput. Nonlinear Dynam. October 2009, 4(4): 041002.
https://doi.org/10.1115/1.3187213
Published Online: August 24, 2009
View Article titled, Parameters Identification for Nonlinear Dynamic Systems Via Genetic Algorithm Optimization
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Topics: Algorithms, Clearances (Engineering), Genetic algorithms, Optimization, Stiffness, Noise (Sound), Nonlinear dynamical systems
Proceedings Papers

Forced Response Assessment Using Modal Force Based Indicator Functions

M. Vahdati, C. Breard, G. Simpson, M. Imregun
Proc. ASME. GT2008, Volume 5: Structures and Dynamics, Parts A and B, 665-672, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50306
https://doi.org/10.1115/GT2008-50306
View Paper titled, Forced Response Assessment Using Modal Force Based Indicator Functions
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Topics: Blades, Compressors, Design, Finite element analysis, Finite element model, Flow (Dynamics), Navier-Stokes equations, Pressure, Rotors, Stators
Proceedings Papers

Influence of Stagger Angle Variation on Aerodynamic Damping and Frequency Shifts

I. Sladojevic´, A. I. Sayma, M. Imregun
Proc. ASME. GT2007, Volume 5: Turbo Expo 2007, 683-700, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-28166
https://doi.org/10.1115/GT2007-28166
View Paper titled, Influence of Stagger Angle Variation on Aerodynamic Damping and Frequency Shifts
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Topics: Damping, Blades, Aircraft engines, Mechanical properties, Rotors
Proceedings Papers

Analysis of Low-Pressure Turbine Flutter for Different Shroud Interfaces

X. Wu, M. Vahdati, C. Schipani, M. Imregun
Proc. ASME. GT2007, Volume 5: Turbo Expo 2007, 629-636, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27377
https://doi.org/10.1115/GT2007-27377
View Paper titled, Analysis of Low-Pressure Turbine Flutter for Different Shroud Interfaces
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Topics: Flutter (Aerodynamics), Pressure, Turbines, Wear, Design, Rotors, Annulus, Blades, Damping, Finite element analysis
Proceedings Papers

A Numerical Investigation of Aeroacoustic Fan Blade Flutter

X. Wu, M. Vahdati, A. I. Sayma, M. Imregun
Proc. ASME. GT2003, Volume 4: Turbo Expo 2003, 357-364, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38454
https://doi.org/10.1115/GT2003-38454
View Paper titled, A Numerical Investigation of Aeroacoustic Fan Blade Flutter
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Topics: Blades, Flutter (Aerodynamics), Ducts, Manufacturing, Pressure, Acoustical properties, Aeroelasticity, Flow (Dynamics), Flow separation, Nozzles
Proceedings Papers

Investigation of the Influence of Aerodynamic Coupling on Response Levels of Mistuned Bladed Discs With Weak Structural Coupling

I. Sladojevic´, E. P. Petrov, A. I. Sayma, M. Imregun, J. S. Green
Proc. ASME. GT2005, Volume 4: Turbo Expo 2005, 543-551, June 6–9, 2005
Publisher: American Society of Mechanical Engineers
Paper No: GT2005-69050
https://doi.org/10.1115/GT2005-69050
View Paper titled, Investigation of the Influence of Aerodynamic Coupling on Response Levels of Mistuned Bladed Discs With Weak Structural Coupling
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Topics: Disks, Blades, Aerodynamics, Annulus, Computational fluid dynamics, Finite element analysis, Fluid-dynamic forces, Gaussian distribution, Vibration
Proceedings Papers

Forced Response Variation of Aerodynamically and Structurally Mistuned Turbo-Machinery Rotors

I. Sladojevic´, E. P. Petrov, M. Imregun, A. I. Sayma
Proc. ASME. GT2006, Volume 5: Marine; Microturbines and Small Turbomachinery; Oil and Gas Applications; Structures and Dynamics, Parts A and B, 961-971, May 8–11, 2006
Publisher: American Society of Mechanical Engineers
Paper No: GT2006-90948
https://doi.org/10.1115/GT2006-90948
View Paper titled, Forced Response Variation of Aerodynamically and Structurally Mistuned Turbo-Machinery Rotors
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Topics: Aircraft engines, Annulus, Blades, Damping, Disks, Elasticity, Finite element model, Flutter (Aerodynamics), Rotors, Turbomachinery
Proceedings Papers

Unsteady Flow and Aeroelasticity Behaviour of Aero-Engine Core Compressors During Rotating Stall and Surge

M. Vahdati, G. Simpson, M. Imregun
Proc. ASME. GT2006, Volume 6: Turbomachinery, Parts A and B, 153-163, May 8–11, 2006
Publisher: American Society of Mechanical Engineers
Paper No: GT2006-90308
https://doi.org/10.1115/GT2006-90308
View Paper titled, Unsteady Flow and Aeroelasticity Behaviour of Aero-Engine Core Compressors During Rotating Stall and Surge
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Topics: Aeroelasticity, Aircraft engines, Compressors, Surges, Unsteady flow, Flow (Dynamics), Engines, Pressure, Annulus, Blades
Journal Articles

Unsteady Flow and Aeroelasticity Behavior of Aeroengine Core Compressors During Rotating Stall and Surge

M. Vahdati, G. Simpson, M. Imregun
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2008, 130(3): 031017.
https://doi.org/10.1115/1.2777188
Published Online: May 6, 2008
View Article titled, Unsteady Flow and Aeroelasticity Behavior of Aeroengine Core Compressors During Rotating Stall and Surge
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Topics: Blades, Compressors, Flow (Dynamics), Pressure, Rotors, Surges, Unsteady flow, Engines, Annulus, Steady state
Journal Articles

Multibladerow Forced Response Modeling in Axial-Flow Core Compressors

M. Vahdati, A. I. Sayma, M. Imregun, G. Simpson
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. April 2007, 129(2): 412–420.
https://doi.org/10.1115/1.2436892
Published Online: June 3, 2005
View Article titled, Multibladerow Forced Response Modeling in Axial-Flow Core Compressors
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Topics: Blades, Compressors, Computation, Excitation, Flow (Dynamics), Vibration, Damping, Engines, Stators, Modeling
Journal Articles

On the Use of Atmospheric Boundary Conditions for Axial-Flow Compressor Stall Simulations

M. Vahdati, A. I. Sayma, C. Freeman, M. Imregun
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Article
J. Turbomach. April 2005, 127(2): 349–351.
https://doi.org/10.1115/1.1861912
Published Online: August 27, 2004
View Article titled, On the Use of Atmospheric Boundary Conditions for Axial-Flow Compressor Stall Simulations
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Topics: Axial flow, Blades, Boundary-value problems, Compressors, Nozzles, Simulation, Computational fluid dynamics, Flow (Dynamics), Pressure