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Zoltán S. Spakovszky
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Journal Articles

Tail-Integrated Boundary Layer Ingesting Propulsion Systems for Turbo-Electric Aircraft

Zhibo Chen, Marshall C. Galbraith, Zoltán S. Spakovszky, Edward M. Greitzer, Jayant S. Sabnis
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. February 2024, 146(2): 021004.
Paper No: TURBO-23-1234
https://doi.org/10.1115/1.4063930
Published Online: November 8, 2023
View Article titled, Tail-Integrated Boundary Layer Ingesting Propulsion Systems for Turbo-Electric Aircraft
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Topics: Aircraft, Boundary layers, Design, Flow (Dynamics), Nozzles, Propulsion systems, Mach number
Proceedings Papers

Tail-Integrated Boundary Layer Ingesting Propulsion Systems for Turbo-Electric Aircraft

Zhibo Chen, Marshall C. Galbraith, Zoltán S. Spakovszky, Edward M. Greitzer, Jayant S. Sabnis
Proc. ASME. GT2023, Volume 13A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V13AT29A021, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101991
https://doi.org/10.1115/GT2023-101991
View Paper titled, Tail-Integrated Boundary Layer Ingesting Propulsion Systems for Turbo-Electric Aircraft
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Topics: Aircraft, Boundary layers, Propulsion systems, Turbochargers
Journal Articles

Instabilities Everywhere! Hard Problems in Aero-Engines

Zoltán S. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. February 2023, 145(2): 021011.
Paper No: TURBO-21-1198
https://doi.org/10.1115/1.4055424
Published Online: October 14, 2022
View Article titled, Instabilities Everywhere! Hard Problems in Aero-Engines
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Topics: Aircraft engines, Damping, Engines, Whirls, Compressors, Bearings, Rotors, Flow (Dynamics), Flutter (Aerodynamics)
Journal Articles

Effects of Surface Waviness on Fan Blade Boundary Layer Transition and Profile Loss—Part I: Methodology and Computational Results

Jinwook Lee, Zoltán S. Spakovszky, Edward M. Greitzer, Mark Drela, Jérôme Talbotec
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. February 2022, 144(2): 021001.
Paper No: TURBO-21-1159
https://doi.org/10.1115/1.4052235
Published Online: September 22, 2021
View Article titled, Effects of Surface Waviness on Fan Blade Boundary Layer Transition and Profile Loss—Part I: Methodology and Computational Results
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Topics: Blades, Boundary layers, Flow (Dynamics), Wavelength, Waves, Acoustics
Journal Articles

Effects of Surface Waviness on Fan Blade Boundary Layer Transition and Profile Loss—Part II: Experimental Assessments and Applications

Jinwook Lee, Vaishnavi Ramaswamy, Zoltán S. Spakovszky, Edward M. Greitzer, Mark Drela, Jérôme Talbotec
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. February 2022, 144(2): 021002.
Paper No: TURBO-21-1160
https://doi.org/10.1115/1.4052236
Published Online: September 22, 2021
View Article titled, Effects of Surface Waviness on Fan Blade Boundary Layer Transition and Profile Loss—Part II: Experimental Assessments and Applications
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Topics: Blades, Boundary layers, Chords (Trusses), Wavelength, Waves, Thermography, Design, Surface waves (Fluid)
Proceedings Papers

Instabilities Everywhere! Hard Problems in Aero-Engines

Zoltán S. Spakovszky
Proc. ASME. GT2021, Volume 1: Aircraft Engine; Fans and Blowers; Marine; Wind Energy; Scholar Lecture, V001T41A001, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-60864
https://doi.org/10.1115/GT2021-60864
View Paper titled, Instabilities Everywhere! Hard Problems in Aero-Engines
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Topics: Aircraft engines, Damping
Proceedings Papers

Effects of Surface Waviness on Fan Blade Boundary Layer Transition and Profile Loss — Part I: Methodology and Computational Results

Jinwook Lee, Zoltán S. Spakovszky, Edward M. Greitzer, Mark Drela, Jérôme Talbotec
Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A010, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58676
https://doi.org/10.1115/GT2021-58676
View Paper titled, Effects of Surface Waviness on Fan Blade Boundary Layer Transition and Profile Loss — Part I: Methodology and Computational Results
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Topics: Blades, Boundary layers, Wavelength, Acoustics, Composite materials, Computation, Energy transformation, Flow (Dynamics), Noise (Sound), Surface waves (Fluid)
Proceedings Papers

Effects of Surface Waviness on Fan Blade Boundary Layer Transition and Profile Loss — Part II: Experimental Assessments and Applications

Jinwook Lee, Vaishnavi Ramaswamy, Zoltán S. Spakovszky, Edward M. Greitzer, Mark Drela, Jérôme Talbotec
Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A011, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58678
https://doi.org/10.1115/GT2021-58678
View Paper titled, Effects of Surface Waviness on Fan Blade Boundary Layer Transition and Profile Loss — Part II: Experimental Assessments and Applications
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Topics: Blades, Boundary layers, Wavelength, Surface waves (Fluid), Aircraft, Composite materials, Delays, Resonance, Reynolds number, Thermography
Journal Articles

The Role of Impeller Outflow Conditions on the Performance of Vaned Diffusers

Jonathan N. Everitt, Zoltán S. Spakovszky, Daniel Rusch, Jürg Schiffmann
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. April 2017, 139(4): 041004.
Paper No: TURBO-16-1224
https://doi.org/10.1115/1.4035048
Published Online: January 4, 2017
View Article titled, The Role of Impeller Outflow Conditions on the Performance of Vaned Diffusers
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Topics: Compressors, Diffusers, Flow (Dynamics), Pressure, Impellers, Mach number, Design, Inflow
Journal Articles

An Investigation of Nonlinear Flow Oscillations in a High-Pressure Centrifugal Pump

Claudio Lettieri, Jeff Defoe, Zoltán S. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. November 2015, 137(11): 111004.
Paper No: TURBO-14-1294
https://doi.org/10.1115/1.4031250
Published Online: September 2, 2015
View Article titled, An Investigation of Nonlinear Flow Oscillations in a High-Pressure Centrifugal Pump
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Topics: Design, Flow (Dynamics), Pumps, Impellers, Pressure, Separation (Technology), Stability, Diffusers, Centrifugal pumps, Feedback
Journal Articles

An Investigation of Real Gas Effects in Supercritical CO 2 Centrifugal Compressors

Nikola D. Baltadjiev, Claudio Lettieri, Zoltán S. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. September 2015, 137(9): 091003.
Paper No: TURBO-14-1319
https://doi.org/10.1115/1.4029616
Published Online: September 1, 2015
View Article titled, An Investigation of Real Gas Effects in Supercritical CO 2 Centrifugal Compressors
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Topics: Carbon dioxide, Compressors, Condensation, Flow (Dynamics), Fluids, Pressure, Supercritical carbon dioxide, Impellers, Computational fluid dynamics
Proceedings Papers

Ultra-Short Nacelles for Low Fan Pressure Ratio Propulsors

Andreas Peters, Zoltán S. Spakovszky, Wesley K. Lord, Becky Rose
Proc. ASME. GT2014, Volume 1A: Aircraft Engine; Fans and Blowers, V01AT01A029, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26369
https://doi.org/10.1115/GT2014-26369
View Paper titled, Ultra-Short Nacelles for Low Fan Pressure Ratio Propulsors
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Topics: Pressure, Design, Drag (Fluid dynamics), Flow (Dynamics), Mach number, Rotors, Fuels, Weight (Mass), Aircraft, Annulus
Journal Articles

Ultrashort Nacelles for Low Fan Pressure Ratio Propulsors

Andreas Peters, Zoltán S. Spakovszky, Wesley K. Lord, Becky Rose
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. February 2015, 137(2): 021001.
Paper No: TURBO-14-1120
https://doi.org/10.1115/1.4028235
Published Online: September 10, 2014
View Article titled, Ultrashort Nacelles for Low Fan Pressure Ratio Propulsors
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Topics: Design, Flow (Dynamics), Rotors, Pressure, Mach number, Simulation, Drag (Fluid dynamics)
Journal Articles

Effects of Boundary-Layer Ingestion on the Aero-Acoustics of Transonic Fan Rotors

Jeffrey J. Defoe, Zoltán S. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. September 2013, 135(5): 051013.
Paper No: TURBO-12-1146
https://doi.org/10.1115/1.4023461
Published Online: June 26, 2013
View Article titled, Effects of Boundary-Layer Ingestion on the Aero-Acoustics of Transonic Fan Rotors
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Topics: Boundary layers, Ducts, Flow (Dynamics), Noise (Sound), Rotors, Vortices, Acoustics, Shock (Mechanics), Geometry, Vorticity
Journal Articles

An Investigation of Stall Inception in Centrifugal Compressor Vaned Diffuser 1

Jonathan N. Everitt, Zoltán S. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. January 2013, 135(1): 011025.
Paper No: TURBO-11-1156
https://doi.org/10.1115/1.4006533
Published Online: November 5, 2012
View Article titled, An Investigation of Stall Inception in Centrifugal Compressor Vaned Diffuser 1
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Topics: Compressors, Design, Diffusers, Flow (Dynamics), Stall inception, Pressure, Simulation, Wavelength, Impellers
Journal Articles

Shock Propagation and MPT Noise From a Transonic Rotor in Nonuniform Flow

Jeffrey J. Defoe, Zoltán S. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. January 2013, 135(1): 011016.
Paper No: TURBO-11-1104
https://doi.org/10.1115/1.4006497
Published Online: October 30, 2012
View Article titled, Shock Propagation and MPT Noise From a Transonic Rotor in Nonuniform Flow
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Topics: Blades, Ducts, Flow (Dynamics), Noise (Sound), Rotors, Shock (Mechanics), Acoustics, Pressure, Wave propagation, Inflow
Journal Articles

Rotor Interaction Noise in Counter-Rotating Propfan Propulsion Systems

Andreas Peters, Zoltán S. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011002.
https://doi.org/10.1115/1.4003223
Published Online: May 24, 2011
View Article titled, Rotor Interaction Noise in Counter-Rotating Propfan Propulsion Systems
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Topics: Carbon reinforced plastics, Design, Noise (Sound), Rotors, Aircraft, Acoustics, Blades