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Proceedings Papers

Technoeconomic Comparison of sCO2 and ORC Systems for Waste Heat Recovery

Timothy C. Allison, Jason C. Wilkes, Karl Wygant, Robert Pelton

Proc. ASME. GT2022, Volume 9: Supercritical CO2, V009T28A029, June 13–17, 2022

Paper No: GT2022-83434

DOI: https://doi.org/10.1115/GT2022-83434

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Topics: Heat recovery, Organic Rankine cycle, Supercritical carbon dioxide, Thermodynamic power cycles

Proceedings Papers

Measurements of End Cap Temperatures in a Multistage Barrel-Style Centrifugal Compressor

Natalie R. Smith, Jason C. Wilkes, Jonathan Wade, Timothy C. Allison, Meera Day Towler, J. Jeffrey Moore, Ian Weinberg, Michael McCune

Proc. ASME. GT2019, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T27A026, June 17–21, 2019

Paper No: GT2019-91798

DOI: https://doi.org/10.1115/GT2019-91798

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Topics: Compressors, Temperature, Gas compressors, Fluids, Leakage, Risk, Seals, Temperature distribution

Journal Articles

Experimental Validation of a Wide-Range Centrifugal Compressor Stage for Supercritical CO 2 Power Cycles

Timothy C. Allison, Natalie R. Smith, Robert Pelton, Jason C. Wilkes, Sewoong Jung

J. Eng. Gas Turbines Power. June 2019, 141(6): 061011.

Paper No: GTP-18-1621

DOI: https://doi.org/10.1115/1.4041920

Published Online: February 18, 2019

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Topics: Compressors, Computational fluid dynamics, Design, Flow (Dynamics), Impellers, Thermodynamic power cycles, Diffusers, Temperature, Supercritical carbon dioxide

Journal Articles

The Comparison of Aerodynamic Performance Data Acquired From Thermal Measurements and a Torquemeter on a Compressor Impeller

Natalie R. Smith, Timothy C. Allison, Jason C. Wilkes, Christopher Clarke, Michael Cave

J. Eng. Gas Turbines Power. April 2019, 141(4): 041011.

Paper No: GTP-18-1623

DOI: https://doi.org/10.1115/1.4041740

Published Online: November 16, 2018

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Topics: Flow (Dynamics), Heat, Heat losses, Impellers, Temperature, Torque, Torquemeters, Enthalpy, Steady state, Measurement uncertainty

Proceedings Papers

The Comparison of Aerodynamic Performance Data Acquired From Thermal Measurements and a Torquemeter on a Compressor Impeller

Natalie R. Smith, Christopher Clarke, Timothy C. Allison, Michael Cave, Jason C. Wilkes

Proc. ASME. GT2018, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T27A029, June 11–15, 2018

Paper No: GT2018-77016

DOI: https://doi.org/10.1115/GT2018-77016

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Topics: Compressor impellers, Torquemeters, Heat, Heat losses, Steady state, Torque, Enthalpy, Impellers, Machinery, Measurement uncertainty

Proceedings Papers

Experimental Validation of a Wide-Range Centrifugal Compressor Stage for Supercritical CO 2 Power Cycles

Timothy C. Allison, Natalie R. Smith, Robert Pelton, Sewoong Jung, Jason C. Wilkes

Proc. ASME. GT2018, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T38A023, June 11–15, 2018

Paper No: GT2018-77026

DOI: https://doi.org/10.1115/GT2018-77026

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Topics: Compressors, Supercritical carbon dioxide, Thermodynamic power cycles, Design, Flow (Dynamics), Carbon dioxide, Cycles, Impellers, Transients (Dynamics), Computational fluid dynamics

Proceedings Papers

Application of Dry-Friction Whip and Whirl Solution Methods to Systems With Support Asymmetry

Jason C. Wilkes

Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A041, June 11–15, 2018

Paper No: GT2018-76991

DOI: https://doi.org/10.1115/GT2018-76991

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Topics: Dry-friction whip and whirl, Rotors, Stators, Annulus, Clearances (Engineering)

Journal Articles

Impact of Bearing Clearance on Measured Stiffness and Damping Coefficients and Thermal Performance of a High-Stiffness Generation 3 Foil Journal Bearing

Jason C. Wilkes, Jonathan Wade, Aaron Rimpel, Jeff Moore, Erik Swanson, Joseph Grieco, Jerry Brady

J. Eng. Gas Turbines Power. July 2018, 140(7): 072503.

Paper No: GTP-17-1107

DOI: https://doi.org/10.1115/1.4038603

Published Online: April 10, 2018

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Topics: Bearings, Clearances (Engineering), Damping, Stiffness, Stress

Proceedings Papers

Impact of Bearing Clearance on Measured Stiffness and Damping Coefficients and Thermal Performance of a High-Stiffness Generation 3 Foil Journal Bearing

Jason C. Wilkes, Jonathan Wade, Aaron Rimpel, Jeff Moore, Erik Swanson, Joseph Grieco, Jerry Brady

Proc. ASME. GT2016, Volume 7B: Structures and Dynamics, V07BT31A011, June 13–17, 2016

Paper No: GT2016-56478

DOI: https://doi.org/10.1115/GT2016-56478

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Topics: Bearings, Clearances (Engineering), Damping, Journal bearings, Stiffness, Foil bearings, Springs, Compressors, Natural gas, Stability

Proceedings Papers

Modeling a Spiral Groove Thrust Bearing Using 3-D, Two-Way Fluid Structure Interaction With Conjugate Heat Transfer

Kevin Hoopes, Jason C. Wilkes, Jeff Moore, Joseph Grieco, Kevin Passmore, Jerry Brady

Proc. ASME. GT2016, Volume 7B: Structures and Dynamics, V07BT31A035, June 13–17, 2016

Paper No: GT2016-57933

DOI: https://doi.org/10.1115/GT2016-57933

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Topics: Fluid structure interaction, Heat transfer, Modeling, Thrust bearings, Fluids, Simulation, Stress, Thrust, Film thickness, Bearings

Proceedings Papers

A General Model for Two-Point Contact Dry-Friction Whip and Whirl: Further Advancements and Experimental Test Results

Jason C. Wilkes, Tim Allison

Proc. ASME. GT2015, Volume 7A: Structures and Dynamics, V07AT31A024, June 15–19, 2015

Paper No: GT2015-43815

DOI: https://doi.org/10.1115/GT2015-43815

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Topics: Dry-friction whip and whirl, Rotors, Air bearings, Bushings, Failure, Magnetic bearings, Stators, Whirls

Proceedings Papers

Tilting Pad Journal Bearings: A Discussion on Stability Calculation, Frequency Dependence, and Pad and Pivot Flexibility

Jason C. Wilkes, Dara W. Childs

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 991-1006, June 11–15, 2012

Paper No: GT2012-69809

DOI: https://doi.org/10.1115/GT2012-69809

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Topics: Journal bearings, Stability, Bearings, Damping, Stiffness, Clearances (Engineering), Stress, Degrees of freedom, Excitation, Operating temperature

Proceedings Papers

A General Model for Two-Point Contact Dry-Friction Whip and Whirl

Jason C. Wilkes

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 957-964, June 11–15, 2012

Paper No: GT2012-69800

DOI: https://doi.org/10.1115/GT2012-69800

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Topics: Dry-friction whip and whirl, Rotors, Stators, Air bearings, Bushings, Computer simulation, Failure, Magnetic bearings

Proceedings Papers

Improving Tilting-Pad Journal Bearing Predictions: Part I—Model Development and Impact of Rotor-Excited Versus Bearing-Excited Impedance Coefficients

Jason C. Wilkes, Dara W. Childs

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 965-978, June 11–15, 2012

Paper No: GT2012-69804

DOI: https://doi.org/10.1115/GT2012-69804

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Topics: Bearings, Journal bearings, Model development, Rotors, Clearances (Engineering)

Proceedings Papers

Improving Tilting-Pad Journal Bearing Predictions: Part II—Comparison of Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing

Jason C. Wilkes, Dara W. Childs

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 979-990, June 11–15, 2012

Paper No: GT2012-69808

DOI: https://doi.org/10.1115/GT2012-69808

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Topics: Journal bearings, Rotors, Transfer functions, Clearances (Engineering), Excitation, Probes, Strain gages, Stress, Yaw

Journal Articles

Improving Tilting-Pad Journal Bearing Predictions—Part II: Comparison of Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing

Jason C. Wilkes, Dara W. Childs

J. Eng. Gas Turbines Power. January 2013, 135(1): 012503.

Paper No: GTP-12-1250

DOI: https://doi.org/10.1115/1.4007368

Published Online: December 4, 2012

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Topics: Bearings, Rotors, Transfer functions, Stress, Stiffness

Journal Articles

Improving Tilting Pad Journal Bearing Predictions—Part I: Model Development and Impact of Rotor Excited Versus Bearing Excited Impedance Coefficients

Jason C. Wilkes, Dara W. Childs

J. Eng. Gas Turbines Power. January 2013, 135(1): 012502.

Paper No: GTP-12-1249

DOI: https://doi.org/10.1115/1.4007367

Published Online: December 4, 2012

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Topics: Bearings, Fluid films, Rotors, Stiffness

Journal Articles

Tilting Pad Journal Bearings—A Discussion on Stability Calculation, Frequency Dependence, and Pad and Pivot

Jason C. Wilkes, Dara W. Childs

J. Eng. Gas Turbines Power. December 2012, 134(12): 122508.

DOI: https://doi.org/10.1115/1.4007369

Published Online: October 22, 2012

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Topics: Bearings, Stiffness, Damping, Stress, Stability, Clearances (Engineering)

Proceedings Papers

Measured and Predicted Transfer Functions Between Rotor Motion and Pad Motion for a Rocker-Back Tilting-Pad Bearing in LOP Configuration

Jason C. Wilkes

Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 663-674, June 6–10, 2011

Paper No: GT2011-46510

DOI: https://doi.org/10.1115/GT2011-46510

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Topics: Bearings, Rotors, Transfer functions, Damping, Stress, Excitation, Stiffness, Accounting, Deformation, Degrees of freedom

Journal Articles

The Numerical and Experimental Characteristics of Multimode Dry-Friction Whip and Whirl

Jason C. Wilkes, Dara W. Childs, Benjamin J. Dyck, Stephen G. Phillips

J. Eng. Gas Turbines Power. May 2010, 132(5): 052503.

DOI: https://doi.org/10.1115/1.3204658

Published Online: March 4, 2010

View Article

Topics: Dry-friction whip and whirl, Rotors, Stators, Whirls, Simulation, Simulation models, Bearings, Friction

Journal citation

NARROW

Technoeconomic Comparison of sCO2 and ORC Systems for Waste Heat Recovery

Measurements of End Cap Temperatures in a Multistage Barrel-Style Centrifugal Compressor

Experimental Validation of a Wide-Range Centrifugal Compressor Stage for Supercritical CO 2 Power Cycles

The Comparison of Aerodynamic Performance Data Acquired From Thermal Measurements and a Torquemeter on a Compressor Impeller

The Comparison of Aerodynamic Performance Data Acquired From Thermal Measurements and a Torquemeter on a Compressor Impeller

Experimental Validation of a Wide-Range Centrifugal Compressor Stage for Supercritical CO 2 Power Cycles

Application of Dry-Friction Whip and Whirl Solution Methods to Systems With Support Asymmetry

Impact of Bearing Clearance on Measured Stiffness and Damping Coefficients and Thermal Performance of a High-Stiffness Generation 3 Foil Journal Bearing

Impact of Bearing Clearance on Measured Stiffness and Damping Coefficients and Thermal Performance of a High-Stiffness Generation 3 Foil Journal Bearing

Modeling a Spiral Groove Thrust Bearing Using 3-D, Two-Way Fluid Structure Interaction With Conjugate Heat Transfer

A General Model for Two-Point Contact Dry-Friction Whip and Whirl: Further Advancements and Experimental Test Results

Tilting Pad Journal Bearings: A Discussion on Stability Calculation, Frequency Dependence, and Pad and Pivot Flexibility

A General Model for Two-Point Contact Dry-Friction Whip and Whirl

Improving Tilting-Pad Journal Bearing Predictions: Part I—Model Development and Impact of Rotor-Excited Versus Bearing-Excited Impedance Coefficients

Improving Tilting-Pad Journal Bearing Predictions: Part II—Comparison of Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing

Improving Tilting-Pad Journal Bearing Predictions—Part II: Comparison of Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing

Improving Tilting Pad Journal Bearing Predictions—Part I: Model Development and Impact of Rotor Excited Versus Bearing Excited Impedance Coefficients

Tilting Pad Journal Bearings—A Discussion on Stability Calculation, Frequency Dependence, and Pad and Pivot

Measured and Predicted Transfer Functions Between Rotor Motion and Pad Motion for a Rocker-Back Tilting-Pad Bearing in LOP Configuration

The Numerical and Experimental Characteristics of Multimode Dry-Friction Whip and Whirl

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