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Proceedings Papers

On the Pneumatic Hammer of Hybrid Gas Bearings: Measurements and Predictions

Hyunsung Jung, Seki Sin, Kyuman Kim, Junwon Heo, Minsoo Wee, Keun Ryu

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT22A026, June 13–17, 2022

Paper No: GT2022-84146

DOI: https://doi.org/10.1115/GT2022-84146

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Topics: Bearings, Damping, Gas bearings, Hammers

Journal Articles

On the Pneumatic Hammer of Hybrid Gas Bearings: Measurements and Predictions

Hyunsung Jung, Seki Sin, Kyuman Kim, Junwon Heo, Minsoo Wee, Keun Ryu

J. Eng. Gas Turbines Power. December 2022, 144(12): 121011.

Paper No: GTP-22-1366

DOI: https://doi.org/10.1115/1.4055485

Published Online: October 7, 2022

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Topics: Bearings, Damping, Hammers, Pressure, Gas bearings, Stress, Vibration

Journal Articles

Oil-Free Automotive Turbochargers: Drag Friction and On-Engine Performance Comparisons to Oil-Lubricated Commercial Turbochargers

Keun Ryu, Zachary Ashton

J. Eng. Gas Turbines Power. March 2017, 139(3): 032301.

Paper No: GTP-16-1301

DOI: https://doi.org/10.1115/1.4034359

Published Online: September 27, 2016

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Topics: Bearings, Drag (Fluid dynamics), Engines, Friction, Rotors, Turbochargers, Temperature, Compressors

Proceedings Papers

Oil-Free Automotive Turbochargers: Drag Friction and On-Engine Performance Comparisons to Oil-Lubricated Commercial Turbochargers

Keun Ryu, Zachary Ashton

Proc. ASME. GT2016, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T23A034, June 13–17, 2016

Paper No: GT2016-57855

DOI: https://doi.org/10.1115/GT2016-57855

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Topics: Drag (Fluid dynamics), Engines, Friction, Turbochargers, Rotors, Bearings, Reliability, Shorelines, Wear, Compressors

Journal Articles

Bump-Type Foil Bearings and Flexure Pivot Tilting Pad Bearings for Oil-Free Automotive Turbochargers: Highlights in Rotordynamic Performance

Keun Ryu, Zachary Ashton

J. Eng. Gas Turbines Power. April 2016, 138(4): 042501.

Paper No: GTP-15-1275

DOI: https://doi.org/10.1115/1.4031440

Published Online: October 13, 2015

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Topics: Bearings, Rotors, Temperature, Turbines, Foil bearings, Compressors, Gas bearings, Turbochargers

Proceedings Papers

Bump-Type Foil Bearings and Flexure Pivot Tilting Pad Bearings for Oil-Free Automotive Turbochargers: Highlights in Rotordynamic Performance

Keun Ryu, Zachary Ashton

Proc. ASME. GT2015, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T23A026, June 15–19, 2015

Paper No: GT2015-43927

DOI: https://doi.org/10.1115/GT2015-43927

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Topics: Bearings, Bending (Stress), Foil bearings, Turbochargers, Rotors, Gas bearings, Temperature, Clearances (Engineering), Reliability, Stability

Journal Articles

Prediction of Gas Thrust Foil Bearing Performance for Oil-Free Automotive Turbochargers

Luis San Andrés, Keun Ryu, Paul Diemer

J. Eng. Gas Turbines Power. March 2015, 137(3): 032502.

Paper No: GTP-14-1364

DOI: https://doi.org/10.1115/1.4028389

Published Online: September 30, 2014

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Topics: Bearings, Damping, Drag (Fluid dynamics), Film thickness, Foil bearings, Stiffness, Stress, Thrust, Turbochargers, Temperature

Proceedings Papers

Prediction of Gas Thrust Foil Bearing Performance for Oil-Free Automotive Turbochargers

Luis San Andrés, Keun Ryu, Paul Diemer

Proc. ASME. GT2014, Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V01BT24A013, June 16–20, 2014

Paper No: GT2014-25940

DOI: https://doi.org/10.1115/GT2014-25940

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Topics: Foil bearings, Thrust, Turbochargers, Stress, Drag (Fluid dynamics), Bearings, Damping, Stiffness, Temperature, Torque

Proceedings Papers

On the Failure of a Gas Foil Bearing: High Temperature Operation Without Cooling Flow

Keun Ryu, Luis San Andrés

Proc. ASME. GT2013, Volume 7A: Structures and Dynamics, V07AT29A006, June 3–7, 2013

Paper No: GT2013-94244

DOI: https://doi.org/10.1115/GT2013-94244

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Topics: Cooling, Failure, Flow (Dynamics), Foil bearings, High temperature, Rotors, Temperature, Bearings, Reliability, Air flow

Journal Articles

On the Failure of a Gas Foil Bearing: High Temperature Operation Without Cooling Flow

Keun Ryu, Luis San Andrés

J. Eng. Gas Turbines Power. November 2013, 135(11): 112506.

Paper No: GTP-13-1254

DOI: https://doi.org/10.1115/1.4025079

Published Online: September 17, 2013

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Topics: Bearings, Foil bearings, Rotors, Temperature, Cooling, High temperature, Failure

Proceedings Papers

Predictions of Rotordynamic Performance for Electric Turbocompound

Keun Ryu, Augustine Cavagnaro

Proc. ASME. GT2012, Volume 5: Manufacturing Materials and Metallurgy; Marine; Microturbines and Small Turbomachinery; Supercritical CO2 Power Cycles, 743-751, June 11–15, 2012

Paper No: GT2012-69114

DOI: https://doi.org/10.1115/GT2012-69114

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Topics: Bearings, Carbon dioxide, Compressors, Diesel engines, Electricity (Physics), Emissions, Engineering prototypes, Engines, Finite element model, Fluid films

Proceedings Papers

Effect of Cooling Flow on the Operation of a Hot Rotor-Gas Foil Bearing System

Keun Ryu, Luis San Andrés

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 497-509, June 11–15, 2012

Paper No: GT2012-68074

DOI: https://doi.org/10.1115/GT2012-68074

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Topics: Cooling, Flow (Dynamics), Foil bearings, Rotors, Bearings, Temperature, Thermal management, Damping, Dynamics (Mechanics), High temperature

Journal Articles

Effect of Cooling Flow on the Operation of a HotRotor-Gas Foil Bearing System

Keun Ryu, Luis San Andrés

J. Eng. Gas Turbines Power. October 2012, 134(10): 102511.

DOI: https://doi.org/10.1115/1.4007067

Published Online: August 22, 2012

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Topics: Bearings, Cooling, Flow (Dynamics), Foil bearings, Rotors, Temperature

Journal Articles

Prediction of Axial and Circumferential Flow Conditions in a High Temperature Foil Bearing With Axial Cooling Flow

Keun Ryu

J. Eng. Gas Turbines Power. September 2012, 134(9): 094503.

DOI: https://doi.org/10.1115/1.4006841

Published Online: July 25, 2012

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Topics: Bearings, Cooling, Flow (Dynamics), Foil bearings, Rotors, Temperature, High temperature, Thin films

Proceedings Papers

On the Nonlinear Dynamics of Rotor-Foil Bearing Systems: Effects of Shaft Acceleration, Mass Imbalance and Bearing Mechanical Energy Dissipation

Luis San Andre´s, Keun Ryu

Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 343-353, June 6–10, 2011

Paper No: GT2011-45763

DOI: https://doi.org/10.1115/GT2011-45763

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Topics: Bearings, Energy dissipation, Nonlinear dynamics, Rotors, Whirls, Construction, Cycles, Damping, Delays, Design

Journal Articles

Thermal Management and Rotordynamic Performance of a Hot Rotor-Gas Foil Bearings System—Part I: Measurements

Luis San Andrés, Keun Ryu, Tae Ho Kim

J. Eng. Gas Turbines Power. June 2011, 133(6): 062501.

DOI: https://doi.org/10.1115/1.4001826

Published Online: February 17, 2011

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Topics: Bearings, Cooling, Rotors, Temperature, Flow (Dynamics)

Journal Articles

Thermal Management and Rotordynamic Performance of a Hot Rotor-Gas Foil Bearings System—Part II: Predictions Versus Test Data

Luis San Andrés, Keun Ryu, Tae Ho Kim

J. Eng. Gas Turbines Power. June 2011, 133(6): 062502.

DOI: https://doi.org/10.1115/1.4001827

Published Online: February 17, 2011

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Topics: Cooling, Rotors, Temperature, Bearings, Flow (Dynamics), Foil bearings

Proceedings Papers

Thermal Management and Rotordynamic Performance of a Hot Rotor-Gas Foil Bearings System: Part 1—Measurements

Luis San Andre´s, Tae Ho Kim, Keun Ryu

Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 253-262, June 14–18, 2010

Paper No: GT2010-22981

DOI: https://doi.org/10.1115/GT2010-22981

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Topics: Foil bearings, Rotors, Thermal management, Temperature, Bearings, Cooling, Flow (Dynamics), Friction, Geometry, Heat

Proceedings Papers

Dynamic Response of a Rotor-Hybrid Gas Bearing System Due to Base Induced Periodic Motions

Luis San Andre´s, Keun Ryu, Yaying Niu

Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 81-90, June 14–18, 2010

Paper No: GT2010-22277

DOI: https://doi.org/10.1115/GT2010-22277

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Topics: Dynamic response, Gas bearings, Rotors, Bearings, Excitation, Bending (Stress), Combustion, Damage, Engines, Failure

Proceedings Papers

Thermal Management and Rotordynamic Performance of a Hot Rotor-Gas Foil Bearings System: Part 2—Predictions Versus Test Data

Luis San Andre´s, Tae Ho Kim, Keun Ryu

Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 263-271, June 14–18, 2010

Paper No: GT2010-22983

DOI: https://doi.org/10.1115/GT2010-22983

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Topics: Foil bearings, Rotors, Thermal management, Temperature, Bearings, Cooling, Flow (Dynamics), Damping, Dynamic response, Film thickness

Journal citation

NARROW

On the Pneumatic Hammer of Hybrid Gas Bearings: Measurements and Predictions

On the Pneumatic Hammer of Hybrid Gas Bearings: Measurements and Predictions

Oil-Free Automotive Turbochargers: Drag Friction and On-Engine Performance Comparisons to Oil-Lubricated Commercial Turbochargers

Oil-Free Automotive Turbochargers: Drag Friction and On-Engine Performance Comparisons to Oil-Lubricated Commercial Turbochargers

Bump-Type Foil Bearings and Flexure Pivot Tilting Pad Bearings for Oil-Free Automotive Turbochargers: Highlights in Rotordynamic Performance

Bump-Type Foil Bearings and Flexure Pivot Tilting Pad Bearings for Oil-Free Automotive Turbochargers: Highlights in Rotordynamic Performance

Prediction of Gas Thrust Foil Bearing Performance for Oil-Free Automotive Turbochargers

Prediction of Gas Thrust Foil Bearing Performance for Oil-Free Automotive Turbochargers

On the Failure of a Gas Foil Bearing: High Temperature Operation Without Cooling Flow

On the Failure of a Gas Foil Bearing: High Temperature Operation Without Cooling Flow

Predictions of Rotordynamic Performance for Electric Turbocompound

Effect of Cooling Flow on the Operation of a Hot Rotor-Gas Foil Bearing System

Effect of Cooling Flow on the Operation of a HotRotor-Gas Foil Bearing System

Prediction of Axial and Circumferential Flow Conditions in a High Temperature Foil Bearing With Axial Cooling Flow

On the Nonlinear Dynamics of Rotor-Foil Bearing Systems: Effects of Shaft Acceleration, Mass Imbalance and Bearing Mechanical Energy Dissipation

Thermal Management and Rotordynamic Performance of a Hot Rotor-Gas Foil Bearings System—Part I: Measurements

Thermal Management and Rotordynamic Performance of a Hot Rotor-Gas Foil Bearings System—Part II: Predictions Versus Test Data

Thermal Management and Rotordynamic Performance of a Hot Rotor-Gas Foil Bearings System: Part 1—Measurements

Dynamic Response of a Rotor-Hybrid Gas Bearing System Due to Base Induced Periodic Motions

Thermal Management and Rotordynamic Performance of a Hot Rotor-Gas Foil Bearings System: Part 2—Predictions Versus Test Data

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