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Journal Articles

A Feasibility Study of Controllable Gas Foil Bearings With Piezoelectric Materials Via Rotordynamic Model Predictions

Jisu Park, Kyuho Sim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2019, 141(2): 021027.
Paper No: GTP-18-1386
https://doi.org/10.1115/1.4041384
Published Online: October 16, 2018
View Article titled, A Feasibility Study of Controllable Gas Foil Bearings With Piezoelectric Materials Via Rotordynamic Model Predictions
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Topics: Bearings, Clearances (Engineering), Fluid films, Rotors, Foil bearings, Pressure, Piezoelectric materials
Proceedings Papers

A Feasibility Study of Controllable Gas Foil Bearings With Piezoelectric Materials via Rotordynamic Model Predictions

Jisu Park, Kyuho Sim
Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A034, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-76273
https://doi.org/10.1115/GT2018-76273
View Paper titled, A Feasibility Study of Controllable Gas Foil Bearings With Piezoelectric Materials via Rotordynamic Model Predictions
Open the PDF for A Feasibility Study of Controllable Gas Foil Bearings With Piezoelectric Materials via Rotordynamic Model Predictions in another window
Topics: Foil bearings, Piezoelectric materials, Bearings, Clearances (Engineering), Lubrication, Shapes, Damping, Film thickness, Fluid films, Gas bearings
Journal Articles

Development and Performance Measurements of a Beta-Type Free-Piston Stirling Engine Along With Dynamic Model Predictions

Kyuho Sim, Dong-Jun Kim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2017, 139(11): 112806.
Paper No: GTP-17-1122
https://doi.org/10.1115/1.4036967
Published Online: August 1, 2017
View Article titled, Development and Performance Measurements of a Beta-Type Free-Piston Stirling Engine Along With Dynamic Model Predictions
Open the PDF for Development and Performance Measurements of a Beta-Type Free-Piston Stirling Engine Along With Dynamic Model Predictions in another window
Topics: Damping, Engines, Pistons, Stirling engines, Stress, Temperature, Pressure, Dynamic models
Journal Articles

Performance Measurements of Gas Bearings With High Damping Structures of Polymer and Bump Foil Via Electric Motor Driving Tests and One Degree-of-Freedom Shaker Dynamic Loading Tests

Kyuho Sim, Jisu Park
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2017, 139(9): 092504.
Paper No: GTP-17-1047
https://doi.org/10.1115/1.4036063
Published Online: April 11, 2017
View Article titled, Performance Measurements of Gas Bearings With High Damping Structures of Polymer and Bump Foil Via Electric Motor Driving Tests and One Degree-of-Freedom Shaker Dynamic Loading Tests
Open the PDF for Performance Measurements of Gas Bearings With High Damping Structures of Polymer and Bump Foil Via Electric Motor Driving Tests and One Degree-of-Freedom Shaker Dynamic Loading Tests in another window
Topics: Bearings, Clearances (Engineering), Damping, Dynamic testing (Materials), Electric motors, Polymers, Rotors, Stress, Stiffness, Friction
Proceedings Papers

Performance Measurements of Gas Bearings With High Damping Structures of Polymer and Bump Foil via Electric Motor Driving Tests and 1-DOF Shaker Dynamic Loading Tests

Kyuho Sim, Jisu Park
Proc. ASME. GT2016, Volume 7B: Structures and Dynamics, V07BT31A023, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-57345
https://doi.org/10.1115/GT2016-57345
View Paper titled, Performance Measurements of Gas Bearings With High Damping Structures of Polymer and Bump Foil via Electric Motor Driving Tests and 1-DOF Shaker Dynamic Loading Tests
Open the PDF for Performance Measurements of Gas Bearings With High Damping Structures of Polymer and Bump Foil via Electric Motor Driving Tests and 1-DOF Shaker Dynamic Loading Tests in another window
Topics: Damping, Dynamic testing (Materials), Electric motors, Gas bearings, Polymers, Bearings, Rotors, Excitation, Clearances (Engineering), Journal bearings
Proceedings Papers

Development and Performance Measurements of a Beta-Type Free-Piston Stirling Engine Along With Dynamic Model Predictions

Kyuho Sim, Dong-Jun Kim
Proc. ASME. GT2016, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, V003T20A011, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-57207
https://doi.org/10.1115/GT2016-57207
View Paper titled, Development and Performance Measurements of a Beta-Type Free-Piston Stirling Engine Along With Dynamic Model Predictions
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Topics: Dynamic models, Pistons, Stirling engines, Stress, Temperature, Pressure, Engines, Springs, Ceramics, Cooling
Proceedings Papers

Effects of Mechanical Preloads on the Rotordynamic Performance of a Rotor Supported on 3 Pad Gas Foil Journal Bearings

Kyuho Sim, Bonjin Koo, Jong Sung Lee, Tae Ho Kim
Proc. ASME. GT2014, Volume 7B: Structures and Dynamics, V07BT32A015, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25849
https://doi.org/10.1115/GT2014-25849
View Paper titled, Effects of Mechanical Preloads on the Rotordynamic Performance of a Rotor Supported on 3 Pad Gas Foil Journal Bearings
Open the PDF for Effects of Mechanical Preloads on the Rotordynamic Performance of a Rotor Supported on 3 Pad Gas Foil Journal Bearings in another window
Topics: Journal bearings, Rotors, Bearings, Stress, Strips, Clearances (Engineering), Displacement, Electric motors, Permanent magnets, Sensors
Journal Articles

Effects of Mechanical Preloads on the Rotordynamic Performance of a Rotor Supported on Three-Pad Gas Foil Journal Bearings

Kyuho Sim, Bonjin Koo, Jong Sung Lee, Tae Ho Kim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2014, 136(12): 122503.
Paper No: GTP-14-1215
https://doi.org/10.1115/1.4027745
Published Online: June 27, 2014
View Article titled, Effects of Mechanical Preloads on the Rotordynamic Performance of a Rotor Supported on Three-Pad Gas Foil Journal Bearings
Open the PDF for Effects of Mechanical Preloads on the Rotordynamic Performance of a Rotor Supported on Three-Pad Gas Foil Journal Bearings in another window
Topics: Clearances (Engineering), Rotors, Bearings, Thrust, Stress
Proceedings Papers

Feasibility Study of an Oil-Free Turbocharger Supported on Gas Foil Bearings via On-Road Tests of a 2-Liter Class Diesel Vehicle

Kyuho Sim, Suk Bum Kwon, Tae Ho Kim, Yong-Bok Lee
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 945-956, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-69586
https://doi.org/10.1115/GT2012-69586
View Paper titled, Feasibility Study of an Oil-Free Turbocharger Supported on Gas Foil Bearings via On-Road Tests of a 2-Liter Class Diesel Vehicle
Open the PDF for Feasibility Study of an Oil-Free Turbocharger Supported on Gas Foil Bearings via On-Road Tests of a 2-Liter Class Diesel Vehicle in another window
Topics: Diesel, Foil bearings, Roads, Turbochargers, Vehicles, Rotors, Bearings, Shock (Mechanics), Compressors, Engines
Journal Articles

Feasibility Study of an Oil-Free Turbocharger Supported on Gas Foil Bearings Via On-Road Tests of a Two-Liter Class Diesel Vehicle

Yong-Bok Lee, Suk Bum Kwon, Tae Ho Kim, Kyuho Sim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2013, 135(5): 052701.
Paper No: GTP-12-1375
https://doi.org/10.1115/1.4007883
Published Online: April 23, 2013
View Article titled, Feasibility Study of an Oil-Free Turbocharger Supported on Gas Foil Bearings Via On-Road Tests of a Two-Liter Class Diesel Vehicle
Open the PDF for Feasibility Study of an Oil-Free Turbocharger Supported on Gas Foil Bearings Via On-Road Tests of a Two-Liter Class Diesel Vehicle in another window
Topics: Bearings, Clearances (Engineering), Compressors, Diesel, Engines, Foil bearings, Roads, Rotors, Thrust, Turbines
Journal Articles

Rotordynamic Performance of Shimmed Gas Foil Bearings for Oil-Free Turbochargers

Kyuho Sim, Lee Yong-Bok, Tae Ho Kim, Jangwon Lee
Journal: Journal of Tribology
Publisher: ASME
Article Type: Applications
J. Tribol. July 2012, 134(3): 031102.
https://doi.org/10.1115/1.4005892
Published Online: June 25, 2012
View Article titled, Rotordynamic Performance of Shimmed Gas Foil Bearings for Oil-Free Turbochargers
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Topics: Bearings, Rotors, Stress, Compressors, Diesel engines, Deflection, Turbochargers, Foil bearings, Engines, Turbines
Proceedings Papers

Thermal Performance of a Bump Type Gas Foil Bearing Floating on a Hollow Shaft for Increasing Rotating Speed and Static Load

Kyuho Sim, Jin Woo Song, Yong-Bok Lee, Tae Ho Kim
Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 651-662, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-46499
https://doi.org/10.1115/GT2011-46499
View Paper titled, Thermal Performance of a Bump Type Gas Foil Bearing Floating on a Hollow Shaft for Increasing Rotating Speed and Static Load
Open the PDF for Thermal Performance of a Bump Type Gas Foil Bearing Floating on a Hollow Shaft for Increasing Rotating Speed and Static Load in another window
Topics: Foil bearings, Stress, Temperature, Ball bearings, Bearings, Temperature gradient, Wire, Electric motors, Heat, Materials properties
Journal Articles

Development and Performance Measurement of Oil-Free Turbocharger Supported on Gas Foil Bearings

Yong-Bok Lee, Dong-Jin Park, Tae Ho Kim, Kyuho Sim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032506.
https://doi.org/10.1115/1.4004719
Published Online: January 4, 2012
View Article titled, Development and Performance Measurement of Oil-Free Turbocharger Supported on Gas Foil Bearings
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Topics: Bearings, Compressors, Flow (Dynamics), Foil bearings, Pressure, Rotors, Temperature, Turbines, Turbochargers, Thrust
Journal Articles

Thermal Performance Measurement of a Bump Type Gas Foil Bearing Floating on a Hollow Shaft for Increasing Rotating Speed and Static Load

Tae Ho Kim, Jin Woo Song, Yong-Bok Lee, Kyuho Sim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. February 2012, 134(2): 024501.
https://doi.org/10.1115/1.4004401
Published Online: December 8, 2011
View Article titled, Thermal Performance Measurement of a Bump Type Gas Foil Bearing Floating on a Hollow Shaft for Increasing Rotating Speed and Static Load
Open the PDF for Thermal Performance Measurement of a Bump Type Gas Foil Bearing Floating on a Hollow Shaft for Increasing Rotating Speed and Static Load in another window
Topics: Bearings, Foil bearings, Stress, Temperature, Turbomachinery, Temperature measurement, Clearances (Engineering), Strain gages, Thermocouples
Proceedings Papers

Experimental Studies on Flexure Pivot Tilting Pad Gas Bearings With Pad Radial Compliance

Kyuho Sim, Aaron Rimpel, Daejong Kim
Proc. ASME. IJTC2007, ASME/STLE 2007 International Joint Tribology Conference, Parts A and B, 297-299, October 22–24, 2007
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2007-44294
https://doi.org/10.1115/IJTC2007-44294
View Paper titled, Experimental Studies on Flexure Pivot Tilting Pad Gas Bearings With Pad Radial Compliance
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Topics: Bending (Stress), Gas bearings, Rotors, Computer software
Proceedings Papers

Design and Hydrodynamic Performance of Hybrid Flexural Pivot Gas Bearings for High Speed Oil-Free Micro Turbomachinery

Kyuho Sim, Daejong Kim
Proc. ASME. WTC2005, World Tribology Congress III, Volume 2, 91-92, September 12–16, 2005
Publisher: American Society of Mechanical Engineers
Paper No: WTC2005-63561
https://doi.org/10.1115/WTC2005-63561
View Paper titled, Design and Hydrodynamic Performance of Hybrid Flexural Pivot Gas Bearings for High Speed Oil-Free Micro Turbomachinery
Open the PDF for Design and Hydrodynamic Performance of Hybrid Flexural Pivot Gas Bearings for High Speed Oil-Free Micro Turbomachinery in another window
Topics: Design, Gas bearings, Turbomachinery, Rotors, Stiffness, Bearings, Engineering simulation, Simulation, Vibration, Clearances (Engineering)
Proceedings Papers

Stability Analyses on Flexure Pivot Tilting Pad Gas Bearings for Microturbomachinery

Kyuho Sim, Daejong Kim
Proc. ASME. IJTC2006, Part B: Magnetic Storage Tribology; Manufacturing/Metalworking Tribology; Nanotribology; Engineered Surfaces; Biotribology; Emerging Technologies; Special Symposia on Contact Mechanics; Special Symposium on Nanotribology, 1281-1289, October 23–25, 2006
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2006-12158
https://doi.org/10.1115/IJTC2006-12158
View Paper titled, Stability Analyses on Flexure Pivot Tilting Pad Gas Bearings for Microturbomachinery
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Topics: Bending (Stress), Gas bearings, Stability, Bearings, Clearances (Engineering), Rotors, Resonance, Damping, Excitation, Film thickness
Journal Articles

Thermohydrodynamic Analysis of Compliant Flexure Pivot Tilting Pad Gas Bearings

Kyuho Sim, Daejong Kim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2008, 130(3): 032502.
https://doi.org/10.1115/1.2836616
Published Online: April 2, 2008
View Article titled, Thermohydrodynamic Analysis of Compliant Flexure Pivot Tilting Pad Gas Bearings
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Topics: Bearings, Rotors, Temperature, Boundary-value problems, Gas bearings, Stress
Journal Articles

Design of Flexure Pivot Tilting Pads Gas Bearings for High-speed Oil-Free Microturbomachinery

Kyuho Sim, Daejong Kim
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. January 2007, 129(1): 112–119.
https://doi.org/10.1115/1.2372763
Published Online: July 27, 2006
View Article titled, Design of Flexure Pivot Tilting Pads Gas Bearings for High-speed Oil-Free Microturbomachinery
Open the PDF for Design of Flexure Pivot Tilting Pads Gas Bearings for High-speed Oil-Free Microturbomachinery in another window
Topics: Bearings, Clearances (Engineering), Design, Gas bearings, Rotors, Stiffness, Simulation, Bending (Stress), Shorelines