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Daejong Kim
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Proceedings Papers

Experimental Characterization of Darcy Friction Factors of Bump Channel Flows and Application to Cooling Flow Path Design

Daejong Kim
Proc. ASME. GT2024, Volume 10A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing, V10AT22A022, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128199
https://doi.org/10.1115/GT2024-128199
View Paper titled, Experimental Characterization of Darcy Friction Factors of Bump Channel Flows and Application to Cooling Flow Path Design
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Topics: Channel flow, Cooling, Design, Experimental characterization, Flow (Dynamics), Foil bearings, Friction, Gas flow, Turbulence
Proceedings Papers

Design Strategy of Thrust Gas Bearings for Refrigerant Compressors Considering Effects of Centrifugal Force and Convective Inertia

Arvind Prabhakar, Daejong Kim
Proc. ASME. GT2024, Volume 10A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing, V10AT22A011, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-126107
https://doi.org/10.1115/GT2024-126107
View Paper titled, Design Strategy of Thrust Gas Bearings for Refrigerant Compressors Considering Effects of Centrifugal Force and Convective Inertia
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Topics: Centrifugal force, Compressors, Computational fluid dynamics, Design, Gas bearings, Inertia (Mechanics), Refrigerants, Thrust, Turbulence
Journal Articles

Effect of Centrifugal Force of Gas Film on the Load Capacity of Thrust Gas Bearing

Daejong Kim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2024, 146(1): 011006.
Paper No: GTP-23-1362
https://doi.org/10.1115/1.4063319
Published Online: October 17, 2023
View Article titled, Effect of Centrifugal Force of Gas Film on the Load Capacity of Thrust Gas Bearing
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Topics: Bearings, Centrifugal force, Pressure, Stress, Thrust bearings, Temperature
Proceedings Papers

Effect of Leading-Edge Inlet Models on the Performance of Gas Bearings Operating in Highly Compressible Flow Regimes

Arvind Prabhakar, Daejong Kim
Proc. ASME. GT2023, Volume 9: Microturbines, Turbochargers, and Small Turbomachines; Oil and Gas Applications, V009T18A008, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102298
https://doi.org/10.1115/GT2023-102298
View Paper titled, Effect of Leading-Edge Inlet Models on the Performance of Gas Bearings Operating in Highly Compressible Flow Regimes
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Topics: Compressible flow, Gas bearings, Navier-Stokes equations, Pressure
Proceedings Papers

Rotordynamics of a Rotor Supported by Foil Bearings Under Various Housing Excitation

Woongeon Lee, Daejong Kim
Proc. ASME. GT2023, Volume 9: Microturbines, Turbochargers, and Small Turbomachines; Oil and Gas Applications, V009T18A012, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103344
https://doi.org/10.1115/GT2023-103344
View Paper titled, Rotordynamics of a Rotor Supported by Foil Bearings Under Various Housing Excitation
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Topics: Air compressors, Excitation, Foil bearings, Fuel cells, Rotordynamics, Rotors, Simulation
Proceedings Papers

Effect of Centrifugal Force of Gas Film on the Load Capacity of Thrust Gas Bearing

Daejong Kim
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT22A034, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103950
https://doi.org/10.1115/GT2023-103950
View Paper titled, Effect of Centrifugal Force of Gas Film on the Load Capacity of Thrust Gas Bearing
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Topics: Bearings, Centrifugal force, Gas bearings, Stress, Thrust, Thrust bearings
Proceedings Papers

Analytical Study on Hybrid Thrust Foil Bearing, Structural Characterization and Measurement of Static Performance

Ehiremen Ebewele, Daejong Kim, Jeongpill Ki
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT22A039, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-104282
https://doi.org/10.1115/GT2023-104282
View Paper titled, Analytical Study on Hybrid Thrust Foil Bearing, Structural Characterization and Measurement of Static Performance
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Topics: Foil bearings, Hydrostatic pressure, Stiffness, Stress, Thrust
Journal Articles

Static Performance of a Hydrostatic Thrust Foil Bearing for Large Scale Oil-Free Turbomachines

Nguyen LaTray, Daejong Kim, Myongsok Song
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2021, 143(4): 041017.
Paper No: GTP-20-1721
https://doi.org/10.1115/1.4049884
Published Online: February 26, 2021
View Article titled, Static Performance of a Hydrostatic Thrust Foil Bearing for Large Scale Oil-Free Turbomachines
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Topics: Bearings, Deflection, Film thickness, Foil bearings, Hydrostatics, Pressure, Stress, Thrust, Turbomachinery, Disks
Journal Articles

Novel Thrust Foil Bearing With Pocket Grooves for Enhanced Static Performance

Nguyen LaTray, Daejong Kim
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. November 2021, 143(11): 111803.
Paper No: TRIB-20-1472
https://doi.org/10.1115/1.4049941
Published Online: February 23, 2021
View Article titled, Novel Thrust Foil Bearing With Pocket Grooves for Enhanced Static Performance
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Topics: Bearings, Design, Film thickness, Foil bearings, Pressure, Stress, Thrust, Thrust bearings
Proceedings Papers

Experimental Evaluation of 200mm Hybrid Air Foil Bearing Aimed for MW Scale Turbomachinery

Daejong Kim, Nguyen LaTray, Srikanth Honavara-Prasad
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A021, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15042
https://doi.org/10.1115/GT2020-15042
View Paper titled, Experimental Evaluation of 200mm Hybrid Air Foil Bearing Aimed for MW Scale Turbomachinery
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Topics: Foil bearings, Scaling laws (Mathematical physics), Stress, Turbomachinery
Proceedings Papers

Static Performance of a Hydrostatic Thrust Foil Bearing for Large Scale Oil-Free Turbomachines

Nguyen LaTray, Daejong Kim, Myongsok Song
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A022, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15056
https://doi.org/10.1115/GT2020-15056
View Paper titled, Static Performance of a Hydrostatic Thrust Foil Bearing for Large Scale Oil-Free Turbomachines
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Topics: Foil bearings, Hydrostatics, Stress, Thrust, Turbomachinery
Proceedings Papers

Influence of Coating Technologies on Frictional Properties of Foil Bearings During Start/Stop Conditions

Azzedine Dadouche, Qi Yang, Daejong Kim
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A028, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15662
https://doi.org/10.1115/GT2020-15662
View Paper titled, Influence of Coating Technologies on Frictional Properties of Foil Bearings During Start/Stop Conditions
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Topics: Coatings, Foil bearings, Bearings, Friction, Molybdenum, Thermocouples, Titanium, Torque, Accelerometers, Aluminum
Journal Articles

Design of Novel Gas Foil Thrust Bearings and Test Validation in a High-Speed Test Rig

Nguyen LaTray, Daejong Kim
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 2020, 142(7): 071803.
Paper No: TRIB-19-1429
https://doi.org/10.1115/1.4046412
Published Online: March 11, 2020
View Article titled, Design of Novel Gas Foil Thrust Bearings and Test Validation in a High-Speed Test Rig
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Topics: Bearings, Design, Stress, Thrust, Thrust bearings
Journal Articles

Effect of Circumferential Location of Radial Injection on Rotordynamic Performance of Hybrid Air Foil Bearings

Behzad Zamanian Yazdi, Daejong Kim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2018, 140(12): 122504.
Paper No: GTP-18-1538
https://doi.org/10.1115/1.4041646
Published Online: October 23, 2018
View Article titled, Effect of Circumferential Location of Radial Injection on Rotordynamic Performance of Hybrid Air Foil Bearings
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Topics: Bearings, Foil bearings, Rotors, Damping, Simulation, Stiffness, Orifices, Stability, Vibration
Proceedings Papers

Effect of Circumferential Location of Radial Injection on Rotordynamic Performance of Hybrid Air Foil Bearings

Behzad Zamanian Yazdi, Daejong Kim
Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A029, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75983
https://doi.org/10.1115/GT2018-75983
View Paper titled, Effect of Circumferential Location of Radial Injection on Rotordynamic Performance of Hybrid Air Foil Bearings
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Topics: Foil bearings, Rotors, Orifices, Stability, Bearings, Damping, Film thickness, High temperature, Modal analysis, Simulation
Proceedings Papers

Effect of Axial Force on Rotordynamics of a Rigid Rotor Supported by Foil Bearings

Wanhui Liu, Daejong Kim, Kai Feng
Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A033, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-76261
https://doi.org/10.1115/GT2018-76261
View Paper titled, Effect of Axial Force on Rotordynamics of a Rigid Rotor Supported by Foil Bearings
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Topics: Foil bearings, Rotordynamics, Rotors, Bearings, Stability, Modal analysis, Simulation, Stiffness, Damping, Degrees of freedom
Proceedings Papers

A High Speed Test Rig Capable of Running at 190,000rpm to Characterize Gas Foil Thrust Bearings

Nguyen T. LaTray, Daejong Kim
Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A043, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-77111
https://doi.org/10.1115/GT2018-77111
View Paper titled, A High Speed Test Rig Capable of Running at 190,000rpm to Characterize Gas Foil Thrust Bearings
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Topics: Thrust bearings, Stress, Bearings, Testing, Design, Energy consumption, Film thickness, Instrumentation, Temperature, Test facilities
Journal Articles

Rotordynamic Performance of Hybrid Air Foil Bearings With Regulated Hydrostatic Injection

Behzad Zamanian Yazdi, Daejong Kim
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2018, 140(1): 012506.
Paper No: GTP-17-1278
https://doi.org/10.1115/1.4037667
Published Online: September 19, 2017
View Article titled, Rotordynamic Performance of Hybrid Air Foil Bearings With Regulated Hydrostatic Injection
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Topics: Bearings, Foil bearings, Hydrostatics, Rotors, Vibration, Engineering simulation, Simulation, Stability, Clearances (Engineering), Pressure
Journal Articles

Rotordynamics Performance of Hybrid Foil Bearing Under Forced Vibration Input

Daejong Kim, Brian Nicholson, Lewis Rosado, Garry Givan
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2018, 140(1): 012507.
Paper No: GTP-17-1286
https://doi.org/10.1115/1.4037624
Published Online: September 19, 2017
View Article titled, Rotordynamics Performance of Hybrid Foil Bearing Under Forced Vibration Input
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Topics: Bearings, Excitation, Foil bearings, Impulse (Physics), Rotors, Simulation, Stiffness, Stress, Vibration, Weight (Mass)
Proceedings Papers

Rotordynamic Performance of Hybrid Air Foil Bearings With Regulated Hydrostatic Injection

Behzad Zamanian Yazdi, Daejong Kim
Proc. ASME. GT2017, Volume 7A: Structures and Dynamics, V07AT34A012, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63495
https://doi.org/10.1115/GT2017-63495
View Paper titled, Rotordynamic Performance of Hybrid Air Foil Bearings With Regulated Hydrostatic Injection
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Topics: Foil bearings, Hydrostatics, Engineering simulation, Simulation, Bearings, Friction, Rotors, Vibration, Clearances (Engineering), Drag (Fluid dynamics)