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Proceedings Papers

Pulsations and Vibrations in the Discharge Piping of a Throttled Supercritical CO 2 Turbine

Jason Wilkes, Abhay Patil, Jon Bygrave
Proc. ASME. GT2024, Volume 11: Supercritical CO2, V011T28A036, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128951
https://doi.org/10.1115/GT2024-128951
View Paper titled, Pulsations and Vibrations in the Discharge Piping of a Throttled Supercritical CO 2 Turbine
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Topics: Pipes, Supercritical carbon dioxide, Turbines, Vibration, Computational fluid dynamics, Design, Flow (Dynamics), Testing, Whirls, Boundary-value problems
Proceedings Papers

Development of a 250,000 Lb Thrust Bearing Test Rig With Experimental Results

Jason Wilkes, Farhan Ahmed Omer, Thomas Kerr
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT22A035, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103960
https://doi.org/10.1115/GT2023-103960
View Paper titled, Development of a 250,000 Lb Thrust Bearing Test Rig With Experimental Results
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Topics: Thrust bearings, Bearings, Stress, Rollers, Cooling, Design, Displacement, Drag (Fluid dynamics), Engines, Failure
Proceedings Papers

Pump-Turbine Development for Geomechanical Pumped Storage Facility

Abhay Patil, Jason Wilkes, Jordan Nielson, Bunker Hill
Proc. ASME. GT2023, Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, V006T09A008, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103471
https://doi.org/10.1115/GT2023-103471
View Paper titled, Pump-Turbine Development for Geomechanical Pumped Storage Facility
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Topics: Pump turbines, Storage, Design, Flow (Dynamics), Pumps, Turbines, Energy storage, Manufacturing, Reservoirs, Cavitation
Proceedings Papers

Analysis and Prediction of the Machine Capacity Required to Meet Net Zero by 2050

Jason Wilkes, Dan Reitz, David Ransom, Doug Hofer, Rainer Kurz, Thomas Kerr, Matthew Holland
Proc. ASME. GT2023, Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, V006T08A012, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103983
https://doi.org/10.1115/GT2023-103983
View Paper titled, Analysis and Prediction of the Machine Capacity Required to Meet Net Zero by 2050
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Topics: Machinery, Collaboration, Gas turbines, Governments, Heat pumps, Steam turbines, Testing
Proceedings Papers

Stability of a Lateral Contact Between a Rotor and Stator When Rubbing

Jason Wilkes
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT26A019, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103969
https://doi.org/10.1115/GT2023-103969
View Paper titled, Stability of a Lateral Contact Between a Rotor and Stator When Rubbing
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Topics: Rotors, Stability, Stators, Eigenvalues, Bearings, Compressors, Damping, Friction, Machinery, Stiffness
Journal Articles

Experimentally Measured Effectiveness of Different Shroud Swirl Brake Profiles in a Centrifugal Compressor

Jason Wilkes, Natalie Smith, Balaji Venkataraman, Marco Vagani, Sara Goucher
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2023, 145(5): 051012.
Paper No: GTP-21-1576
https://doi.org/10.1115/1.4056109
Published Online: January 10, 2023
View Article titled, Experimentally Measured Effectiveness of Different Shroud Swirl Brake Profiles in a Centrifugal Compressor
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Topics: Brakes, Cavities, Compressors, Design, Flow (Dynamics), Impellers, Pressure, Probes, Rotors
Proceedings Papers

The Pump-Turbine Selection Approach for Geomechanical Storage Facility

Abhay Patil, Bunker Hill, Jason Wilkes
Proc. ASME. GT2022, Volume 4: Cycle Innovations; Cycle Innovations: Energy Storage, V004T07A009, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83146
https://doi.org/10.1115/GT2022-83146
View Paper titled, The Pump-Turbine Selection Approach for Geomechanical Storage Facility
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Topics: Pump turbines, Pumps, Storage, Turbines
Proceedings Papers

Near Critical Point Testing and Performance Results of a sCO2 Compressor for a 10MWe Brayton Cycle

Robert Pelton, Jon Bygrave, Karl Wygant, Jason Wilkes, Thomas Revak, Kilyoung Kim
Proc. ASME. GT2022, Volume 9: Supercritical CO2, V009T28A032, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83503
https://doi.org/10.1115/GT2022-83503
View Paper titled, Near Critical Point Testing and Performance Results of a sCO2 Compressor for a 10MWe Brayton Cycle
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Topics: Brayton cycle, Compressors, Cycles, Testing
Proceedings Papers

Leakage Characteristics of a Stepped Balance Piston Labyrinth Seal in Supercritical CO2

Jason Wilkes, Natalie R. Smith, Karl Wygant, Abhay Patil, Chris Kulhanek
Proc. ASME. GT2022, Volume 9: Supercritical CO2, V009T28A023, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83262
https://doi.org/10.1115/GT2022-83262
View Paper titled, Leakage Characteristics of a Stepped Balance Piston Labyrinth Seal in Supercritical CO2
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Topics: Leakage, Pistons, Supercritical carbon dioxide, Thrust, Aerodynamics, Clearances (Engineering), Compressors, Computational fluid dynamics, Fluid-dynamic forces, Pressure
Proceedings Papers

Design and Testing of a 275 Bar 700 Degree Celsius Expander for an Integrally Geared Supercritical CO2 Compander

Jason Wilkes, Kyle Robinson, Karl Wygant, Rob Pelton, Jonathan Bygrave
Proc. ASME. GT2022, Volume 9: Supercritical CO2, V009T28A025, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83284
https://doi.org/10.1115/GT2022-83284
View Paper titled, Design and Testing of a 275 Bar 700 Degree Celsius Expander for an Integrally Geared Supercritical CO2 Compander
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Topics: Design, Supercritical carbon dioxide, Testing, Compressors, Concentrating solar power, Creep, Fatigue, Gears, High pressure (Physics), High temperature
Proceedings Papers

Numerical Predictions of Mean Performance and Dynamic Behavior of a 10 MWe sCO2 Compressor with Test Data Validation

Ashvin Hosangadi, Tim Weathers, Zisen Liu, Robert Pelton, Karl Wygant, Jason Wilkes
Proc. ASME. GT2022, Volume 9: Supercritical CO2, V009T28A009, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82017
https://doi.org/10.1115/GT2022-82017
View Paper titled, Numerical Predictions of Mean Performance and Dynamic Behavior of a 10 MWe sCO2 Compressor with Test Data Validation
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Topics: Carbon dioxide, Compressors, Condensation, Fluids, Surges
Journal Articles

Numerical Predictions of Mean Performance and Dynamic Behavior of a 10 MWe SCO 2 Compressor With Test Data Validation

Ashvin Hosangadi, Timothy Weathers, Jason Liu, Rob Pelton, Karl Wygant, Jason Wilkes
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2022, 144(12): 121019.
Paper No: GTP-22-1347
https://doi.org/10.1115/1.4055532
Published Online: October 14, 2022
View Article titled, Numerical Predictions of Mean Performance and Dynamic Behavior of a 10 MWe SCO 2 Compressor With Test Data Validation
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Topics: Compressors, Design, Flow (Dynamics), Fluids, Simulation, Temperature, Engineering simulation, Pressure, Impellers, Condensation
Journal Articles

Influence of Ambient Pressure on Measured Stiffness and Damping of Radial Gas Foil Bearings

Jason Wilkes, Steve White
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2022, 144(7): 071008.
Paper No: GTP-22-1015
https://doi.org/10.1115/1.4054059
Published Online: May 20, 2022
View Article titled, Influence of Ambient Pressure on Measured Stiffness and Damping of Radial Gas Foil Bearings
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Topics: Bearings, Damping, Foil bearings, Pressure, Stiffness, Gas bearings
Journal Articles

The Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig

Jason Wilkes, Ryan Cater, Erik Swanson, Kevin Passmore, Jerry Brady
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2022, 144(6): 061003.
Paper No: GTP-21-1574
https://doi.org/10.1115/1.4053715
Published Online: March 11, 2022
View Article titled, The Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig
Open the PDF for The Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig in another window
Topics: Bearings, Pressure, Stress, Thrust, Thrust bearings, Gas bearings, High pressure (Physics)
Proceedings Papers

Influence of Ambient Pressure on Measured Stiffness and Damping of Radial Gas Foil Bearings

Jason Wilkes, Steve White
Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A001, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-02669
https://doi.org/10.1115/GT2021-02669
View Paper titled, Influence of Ambient Pressure on Measured Stiffness and Damping of Radial Gas Foil Bearings
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Topics: Damping, Foil bearings, Pressure, Stiffness, Bearings, Gas bearings, Gases
Proceedings Papers

An Update on the Status of a Reduced Flow Test of a 10mw 700°C sCO2 Integrally Geared Compander

Kelsi M. Katcher, Jason Wilkes, Tim C. Allison
Proc. ASME. GT2021, Volume 10: Supercritical CO2, V010T30A001, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-02604
https://doi.org/10.1115/GT2021-02604
View Paper titled, An Update on the Status of a Reduced Flow Test of a 10mw 700°C sCO2 Integrally Geared Compander
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Topics: Flow (Dynamics), Cycles, Design, Turbines, Compressors, Machinery, Supercritical carbon dioxide, Temperature, Testing, Thermodynamic power cycles
Proceedings Papers

The Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig

Jason Wilkes, Ryan Cater, Erik Swanson, Kevin Passmore, Jerry Brady
Proc. ASME. GT2019, Volume 7B: Structures and Dynamics, V07BT34A037, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91735
https://doi.org/10.1115/GT2019-91735
View Paper titled, The Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig
Open the PDF for The Influence of Ambient Pressure on the Measured Load Capacity of Bump-Foil and Spiral-Groove Gas Thrust Bearings at Ambient Pressures up to 69 Bar on a Novel High-Pressure Gas Bearing Test Rig in another window
Topics: Gas bearings, High pressure (Physics), Pressure, Stress, Thrust bearings, Thrust, Bearings, Failure, Air bearings, Cavities
Proceedings Papers

Experimentally Measured Effectiveness of Different Shroud Swirl Brake Profiles in a Centrifugal Compressor

Jason Wilkes, Natalie Smith, Balaji Venkataraman, Marco Vagani, Sara Goucher
Proc. ASME. GT2019, Volume 7B: Structures and Dynamics, V07BT34A035, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91676
https://doi.org/10.1115/GT2019-91676
View Paper titled, Experimentally Measured Effectiveness of Different Shroud Swirl Brake Profiles in a Centrifugal Compressor
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Topics: Brakes, Compressors, Cavities, Dampers, Design, Probes, Bearings, Flow (Dynamics), Innovation, Rotors
Proceedings Papers

Cycle Modeling and Optimization of an Integrally Geared sCO 2 Compander

Jeffrey Bennett, Jason Wilkes, Timothy Allison, Robert Pelton, Karl Wygant
Proc. ASME. GT2017, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T38A014, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63707
https://doi.org/10.1115/GT2017-63707
View Paper titled, Cycle Modeling and Optimization of an Integrally Geared sCO 2 Compander
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Topics: Cycles, Modeling, Optimization, Design, Temperature, Compressors, Turbines, Concentrating solar power, Cooling, Flow (Dynamics)
Proceedings Papers

Lowering the Levelized Cost of Electricity of a Concentrating Solar Power Tower With a Supercritical Carbon Dioxide Power Cycle

Joshua Schmitt, Jason Wilkes, Timothy Allison, Jeffrey Bennett, Karl Wygant, Robert Pelton
Proc. ASME. GT2017, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T38A028, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64958
https://doi.org/10.1115/GT2017-64958
View Paper titled, Lowering the Levelized Cost of Electricity of a Concentrating Solar Power Tower With a Supercritical Carbon Dioxide Power Cycle
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Topics: Concentrating solar power, Supercritical carbon dioxide, Thermodynamic power cycles, Cycles, Carbon dioxide, Compressors, Emissions, Fluids, Renewable energy, Solar energy