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Proceedings Papers

Effect of Geometric Uncertainty on a One Stage Transonic Compressor of an Industrial Gas Turbine

S. Venkatesh, K. Suzuki, M. Vahdati, L. Salles, Q. Rendu
Proc. ASME. GT2020, Volume 2A: Turbomachinery, V02AT32A078, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-16315
https://doi.org/10.1115/GT2020-16315
View Paper titled, Effect of Geometric Uncertainty on a One Stage Transonic Compressor of an Industrial Gas Turbine
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Topics: Compressors, Industrial gases, Turbines, Uncertainty, Blades, Damage, Stability, Rotors, Annulus, Chords (Trusses)
Journal Articles

Radial Decomposition of Blade Vibration to Identify a Stall Flutter Source in a Transonic Fan

Q. Rendu, M. Vahdati, L. Salles
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2019, 141(10): 101011.
Paper No: TURBO-18-1314
https://doi.org/10.1115/1.4044484
Published Online: October 1, 2019
View Article titled, Radial Decomposition of Blade Vibration to Identify a Stall Flutter Source in a Transonic Fan
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Topics: Blades, Flutter (Aerodynamics), Pressure, Shock waves, Vibration, Fluctuations (Physics), Flow (Dynamics), Damping, Computation, Oscillations
Proceedings Papers

Comparison of Two Numerical Algorithms for Computing the Effects of Mistuning of Fan Flutter

L. Salles, M. Vahdati
Proc. ASME. GT2016, Volume 7B: Structures and Dynamics, V07BT34A018, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-57324
https://doi.org/10.1115/GT2016-57324
View Paper titled, Comparison of Two Numerical Algorithms for Computing the Effects of Mistuning of Fan Flutter
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Topics: Algorithms, Flutter (Aerodynamics), Computation, Blades, Mode shapes, Computational fluid dynamics, Damping, Manufacturing, Annulus, Chords (Trusses)
Journal Articles

Rotating Stall Observations in a High Speed Compressor—Part I: Experimental Study

J. Dodds, M. Vahdati
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. May 2015, 137(5): 051002.
Paper No: TURBO-14-1123
https://doi.org/10.1115/1.4028557
Published Online: May 1, 2015
View Article titled, Rotating Stall Observations in a High Speed Compressor—Part I: Experimental Study
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Topics: Compressors, Rotors, Stators, Blades, Signals
Journal Articles

Rotating Stall Observations in a High Speed Compressor—Part II: Numerical Study

J. Dodds, M. Vahdati
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. May 2015, 137(5): 051003.
Paper No: TURBO-14-1124
https://doi.org/10.1115/1.4028558
Published Online: May 1, 2015
View Article titled, Rotating Stall Observations in a High Speed Compressor—Part II: Numerical Study
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Topics: Compressors, Rotors, Stators, Blades, Flow (Dynamics)
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

Rotating Stall Observations in a High Speed Compressor: Part 1 — Experimental Study

J. Dodds, M. Vahdati
Proc. ASME. GT2014, Volume 2D: Turbomachinery, V02DT44A011, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25634
https://doi.org/10.1115/GT2014-25634
View Paper titled, Rotating Stall Observations in a High Speed Compressor: Part 1 — Experimental Study
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Topics: Compressors, Rotors, Acoustics, Axial flow, Doppler effect, Engineering simulation, Flow (Dynamics), Instrumentation, Physics, Pressure transducers
Proceedings Papers

Rotating Stall Observations in a High Speed Compressor: Part 2 — Numerical Study

J. Dodds, M. Vahdati
Proc. ASME. GT2014, Volume 2D: Turbomachinery, V02DT44A012, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25635
https://doi.org/10.1115/GT2014-25635
View Paper titled, Rotating Stall Observations in a High Speed Compressor: Part 2 — Numerical Study
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Topics: Compressors, Stators, Reynolds-averaged Navier–Stokes equations, Rotors, Simulation, Axial flow, Blades, Clearances (Engineering), Corners (Structural elements), Flow (Dynamics)
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)
Journal Articles

Classification and Fault Detection Methods for Fuel Cell Monitoring and Quality Control

Natalie L. H. Lowery, Maria M. Vahdati, Roland W. E. Potthast, William Holderbaum
Journal: Journal of Electrochemical Energy Conversion and Storage
Publisher: ASME
Article Type: Research-Article
J. Electrochem. En. Conv. Stor. April 2013, 10(2): 021002.
Paper No: FC-12-1061
https://doi.org/10.1115/1.4023565
Published Online: March 21, 2013
View Article titled, Classification and Fault Detection Methods for Fuel Cell Monitoring and Quality Control
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Topics: Flaw detection, Fuel cells, Magnetic fields, Quality control, Currents
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

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

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
Journal Articles

Aeroelasticity Analysis of Air-Riding Seals for Aero-Engine Applications

A. I. Sayma, C. Bre´ard, M. Vahdati, M. Imregun
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. July 2002, 124(3): 607–616.
https://doi.org/10.1115/1.1467086
Published Online: May 31, 2002
View Article titled, Aeroelasticity Analysis of Air-Riding Seals for Aero-Engine Applications
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Topics: Aeroelasticity, Flow (Dynamics), Modeling, Pressure, Aircraft engines, Unsteady flow, Stability
Journal Articles

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

C. Bre´ard, M. Vahdati, A. I. Sayma, M. Imregun
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2002, 124(1): 196–208.
https://doi.org/10.1115/1.1416151
Published Online: February 1, 2000
View Article 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, Flow (Dynamics), Pressure, Vibration, Computation, Resonance, Boundary-value problems