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Z. Spakovszky
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Proceedings Papers

Forced Response System Identification of Full Aero-Engine Rotordynamic Systems for Prognostics and Diagnostics

I. Hur, Z. Spakovszky
Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT26A016, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-84058
https://doi.org/10.1115/GT2022-84058
View Paper titled, Forced Response System Identification of Full Aero-Engine Rotordynamic Systems for Prognostics and Diagnostics
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Topics: Aircraft engines, Damping, Modeling, System identification
Journal Articles

Dynamic Model-Based Identification of Cavitation Compliance and Mass Flow Gain Factor in Rocket Engine Turbopump Inducers

Y. Wan, M. Manfredi, A. Pasini, Z. Spakovszky
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2021, 143(2): 021011.
Paper No: GTP-20-1594
https://doi.org/10.1115/1.4049015
Published Online: January 18, 2021
View Article titled, Dynamic Model-Based Identification of Cavitation Compliance and Mass Flow Gain Factor in Rocket Engine Turbopump Inducers
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Topics: Cavitation, Flow (Dynamics), Surges
Proceedings Papers

Dynamic Model Based Identification of Cavitation Compliance and Mass Flow Gain Factor in Rocket Engine Turbopump Inducers

Y. Wan, M. Manfredi, A. Pasini, Z. Spakovszky
Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A031, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15655
https://doi.org/10.1115/GT2020-15655
View Paper titled, Dynamic Model Based Identification of Cavitation Compliance and Mass Flow Gain Factor in Rocket Engine Turbopump Inducers
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Topics: Cavitation, Dynamic models, Flow (Dynamics), Rocket engines
Journal Articles

Effects of Transient Heat Transfer on Compressor Stability

A. Kiss, Z. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. December 2018, 140(12): 121003.
Paper No: TURBO-18-1182
https://doi.org/10.1115/1.4041290
Published Online: October 15, 2018
View Article titled, Effects of Transient Heat Transfer on Compressor Stability
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Topics: Compressors, Heat transfer, Transients (Dynamics), Blades, Transient heat transfer, Flow (Dynamics), Heat, Stability
Proceedings Papers

Effects of Transient Heat Transfer on Compressor Stability

A. Kiss, Z. Spakovszky
Proc. ASME. GT2018, Volume 1: Aircraft Engine; Fans and Blowers; Marine, V001T01A006, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75413
https://doi.org/10.1115/GT2018-75413
View Paper titled, Effects of Transient Heat Transfer on Compressor Stability
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Topics: Compressors, Stability, Transient heat transfer, Heat transfer, Transients (Dynamics), Blades, Flow (Dynamics), Computation, Engines, Capacitance
Proceedings Papers

Modeling Near Critical and Supercritical Fuel Injection and Mixing in Gas Turbine Applications

C. Lettieri, G. Subashki, Z. Spakovszky
Proc. ASME. GT2018, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A009, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75195
https://doi.org/10.1115/GT2018-75195
View Paper titled, Modeling Near Critical and Supercritical Fuel Injection and Mixing in Gas Turbine Applications
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Topics: Fuels, Gas turbines, Modeling, Evaporation, Drops, Fluids, Combustion chambers, Sprays, Transients (Dynamics), Vapors
Journal Articles

An Investigation of Condensation Effects in Supercritical Carbon Dioxide Compressors

C. Lettieri, D. Yang, Z. Spakovszky
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2015, 137(8): 082602.
Paper No: GTP-14-1592
https://doi.org/10.1115/1.4029577
Published Online: August 1, 2015
View Article titled, An Investigation of Condensation Effects in Supercritical Carbon Dioxide Compressors
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Topics: Compressors, Condensation, Nozzles, Supercritical carbon dioxide
Proceedings Papers

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

N. Baltadjiev, C. Lettieri, Z. Spakovszky
Proc. ASME. GT2014, Volume 3B: Oil and Gas Applications; Organic Rankine Cycle Power Systems; Supercritical CO2 Power Cycles; Wind Energy, V03BT36A011, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26180
https://doi.org/10.1115/GT2014-26180
View Paper titled, An Investigation of Real Gas Effects in Supercritical CO 2 Centrifugal Compressors
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Topics: Compressors, Supercritical carbon dioxide, Flow (Dynamics), Fluids, Vapor pressure, Carbon capture and storage, Carbon dioxide, Channel flow, Computational fluid dynamics, Computer simulation
Journal Articles

Low-Flow-Coefficient Centrifugal Compressor Design for Supercritical CO 2

C. Lettieri, N. Baltadjiev, M. Casey, Z. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. August 2014, 136(8): 081008.
Paper No: TURBO-13-1235
https://doi.org/10.1115/1.4026322
Published Online: January 31, 2014
View Article titled, Low-Flow-Coefficient Centrifugal Compressor Design for Supercritical CO 2
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Topics: Compressors, Design, Diffusers, Flow (Dynamics), Impellers, Supercritical carbon dioxide, Pressure, Stability
Proceedings Papers

Low-Flow-Coefficient Centrifugal Compressor Design for Supercritical CO 2

C. Lettieri, N. Baltadjiev, M. Casey, Z. Spakovszky
Proc. ASME. GT2013, Volume 6C: Turbomachinery, V06CT40A008, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95012
https://doi.org/10.1115/GT2013-95012
View Paper titled, Low-Flow-Coefficient Centrifugal Compressor Design for Supercritical CO 2
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Topics: Compressors, Design, Flow (Dynamics), Supercritical carbon dioxide, Impellers, Diffusers, Carbon capture and storage, Tertiary petroleum recovery, Vaneless diffusers, Vortex shedding
Journal Articles

Drag Management in High Bypass Turbofan Nozzles for Quiet Approach Applications

P. Shah, A. Robinson, A. Price, Z. Spakovszky
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. February 2014, 136(2): 021009.
Paper No: TURBO-12-1250
https://doi.org/10.1115/1.4023908
Published Online: September 26, 2013
View Article titled, Drag Management in High Bypass Turbofan Nozzles for Quiet Approach Applications
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Topics: Drag (Fluid dynamics), Flow (Dynamics), Noise (Sound), Nozzles, Swirling flow, Simulation, Engines, Computational fluid dynamics, Aircraft
Proceedings Papers

Drag Management in High Bypass Turbofan Nozzles for Quiet Approach Applications

P. Shah, A. Robinson, A. Price, Z. Spakovszky
Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 995-1009, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45577
https://doi.org/10.1115/GT2011-45577
View Paper titled, Drag Management in High Bypass Turbofan Nozzles for Quiet Approach Applications
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Topics: Drag (Fluid dynamics), Nozzles, Turbofans, Noise (Sound), Engines, Computational fluid dynamics, Acoustics, Aircraft, Engineering simulation, Outflow
Journal Articles

Demonstration of a Palm-Sized 30 W Air-to-Power Turbine Generator

S. Sato, S. Jovanovic, J. Lang, Z. Spakovszky
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2011, 133(10): 102301.
https://doi.org/10.1115/1.4002826
Published Online: May 2, 2011
View Article titled, Demonstration of a Palm-Sized 30 W Air-to-Power Turbine Generator
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Topics: Design, Flow (Dynamics), Generators, Rotors, Turbines, Turbogenerators, Blades, Stress
Proceedings Papers

Demonstration of a Palm-Sized 30 Watt Air-to-Power Turbine Generator

S. Sato, S. Jovanovic, J. Lang, Z. Spakovszky
Proc. ASME. GT2010, Volume 5: Industrial and Cogeneration; Microturbines and Small Turbomachinery; Oil and Gas Applications; Wind Turbine Technology, 459-470, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22925
https://doi.org/10.1115/GT2010-22925
View Paper titled, Demonstration of a Palm-Sized 30 Watt Air-to-Power Turbine Generator
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Topics: Turbogenerators, Turbines, Design, Stress, Electricity (Physics), Ball bearings, Computational fluid dynamics, Generators, Microelectromechanical systems, Aluminum
Proceedings Papers

A Thermal Mixing Scheme for Portable Gas Turbines

S. Tanaka, Z. Spakovszky
Proc. ASME. GT2010, Volume 5: Industrial and Cogeneration; Microturbines and Small Turbomachinery; Oil and Gas Applications; Wind Turbine Technology, 379-389, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22530
https://doi.org/10.1115/GT2010-22530
View Paper titled, A Thermal Mixing Scheme for Portable Gas Turbines
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Topics: Gas turbines, Cooling, Flow (Dynamics), Exhaust systems, Ejectors, Computational fluid dynamics, Design, Ducts, Temperature, Vortices