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Thomas Hagemann
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Proceedings Papers

The Impact of Pad Elasticity on Frequency-Dependent Linear Dynamic Coefficients of Tilting-Pad Journal Bearings

Daniel Vetter, Philipp Zemella, Thomas Hagemann, Hubert Schwarze
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, V10AT22A013, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-126246
https://doi.org/10.1115/GT2024-126246
View Paper titled, The Impact of Pad Elasticity on Frequency-Dependent Linear Dynamic Coefficients of Tilting-Pad Journal Bearings
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Topics: Elasticity, Journal bearings, Stiffness, Bearings, Boundary-value problems, Deformation, Film thickness, Finite element model, Hydrodynamics, Lubricants
Proceedings Papers

The Impact of Friction in Lube Oil Feed Grooves on Power Loss in High-Speed Journal Bearings

Daniel Vetter, Thomas Hagemann, Hubert Schwarze
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, V10AT22A019, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-127952
https://doi.org/10.1115/GT2024-127952
View Paper titled, The Impact of Friction in Lube Oil Feed Grooves on Power Loss in High-Speed Journal Bearings
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Topics: Friction, Journal bearings, Lubrication
Journal Articles

An Algorithm for Starved Lubricated Journal Bearings With Optionally Locked Lube Oil Feed Grooves

Thomas Hagemann, Daniel Vetter, Hubert Schwarze
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2024, 146(2): 021019.
Paper No: GTP-23-1457
https://doi.org/10.1115/1.4063528
Published Online: November 28, 2023
View Article titled, An Algorithm for Starved Lubricated Journal Bearings With Optionally Locked Lube Oil Feed Grooves
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Topics: Algorithms, Bearings, Flow (Dynamics), Journal bearings, Lubricants, Pressure, Cavitation
Journal Articles

The Impact of Thermal Load and Turbulent Flow on Minimum Film Thickness of a Large Tilting-Pad Journal Bearing

Daniel Vetter, Thomas Hagemann, Hubert Schwarze
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2024, 146(1): 011007.
Paper No: GTP-23-1370
https://doi.org/10.1115/1.4063383
Published Online: October 17, 2023
View Article titled, The Impact of Thermal Load and Turbulent Flow on Minimum Film Thickness of a Large Tilting-Pad Journal Bearing
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Topics: Approximation, Bearings, Clearances (Engineering), Deformation, Film thickness, Stress, Temperature, Thermomechanics, Turbulence, Journal bearings
Proceedings Papers

The Impact of Thermal Load and Turbulent Flow on Minimum Film Thickness of a Large Tilting-Pad Journal Bearing

Daniel Vetter, Thomas Hagemann, Hubert Schwarze
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT22A011, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102244
https://doi.org/10.1115/GT2023-102244
View Paper titled, The Impact of Thermal Load and Turbulent Flow on Minimum Film Thickness of a Large Tilting-Pad Journal Bearing
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Topics: Film thickness, Journal bearings, Thermal loads, Turbulence
Proceedings Papers

An Algorithm for Starved Lubricated Journal Bearings With Optionally Locked Lube Oil Feed Grooves

Thomas Hagemann, Daniel Vetter, Hubert Schwarze
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT22A030, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103732
https://doi.org/10.1115/GT2023-103732
View Paper titled, An Algorithm for Starved Lubricated Journal Bearings With Optionally Locked Lube Oil Feed Grooves
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Topics: Algorithms, Cavitation, Journal bearings
Journal Articles

Identification of Dynamic Coefficients of a Five-Pad Tilting Pad Journal Bearing Up to Highest Surface Speeds

Philipp Zemella, Thomas Hagemann, Bastian Pfau, Hubert Schwarze
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2021, 143(8): 081013.
Paper No: GTP-20-1572
https://doi.org/10.1115/1.4049664
Published Online: March 31, 2021
View Article titled, Identification of Dynamic Coefficients of a Five-Pad Tilting Pad Journal Bearing Up to Highest Surface Speeds
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Topics: Bearings, Damping, Flow (Dynamics), Stiffness, Stress, Journal bearings, Excitation, Fluid films
Journal Articles

Evaluation of the Rotor Temperature Distribution of an Automotive Turbocharger Under Hot Gas Conditions Including Indirect Experimental Validation

Christopher Zeh, Ole Willers, Thomas Hagemann, Hubert Schwarze, Jörg Seume
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2021, 143(3): 031022.
Paper No: GTP-20-1701
https://doi.org/10.1115/1.4049825
Published Online: February 24, 2021
View Article titled, Evaluation of the Rotor Temperature Distribution of an Automotive Turbocharger Under Hot Gas Conditions Including Indirect Experimental Validation
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Topics: Bearings, Heat, Rotors, Temperature, Turbines, Turbochargers, Heat transfer, Flow (Dynamics), Compressors, Thermohydrodynamics
Proceedings Papers

Evaluation of the Rotor Temperature Distribution of an Automotive Turbocharger Under Hot Gas Conditions Including Indirect Experimental Validation

Christopher Zeh, Ole Willers, Thomas Hagemann, Hubert Schwarze, Joerg R. Seume
Proc. ASME. GT2020, Volume 2C: Turbomachinery, V02CT35A051, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-16077
https://doi.org/10.1115/GT2020-16077
View Paper titled, Evaluation of the Rotor Temperature Distribution of an Automotive Turbocharger Under Hot Gas Conditions Including Indirect Experimental Validation
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Topics: Computational fluid dynamics, Heat transfer, Rotors, Temperature, Temperature distribution, Turbochargers, Bearings, Flow (Dynamics), Fluid films, Heat
Proceedings Papers

Identification of Dynamic Coefficients of a Five-Pad Tilting Pad Journal Bearing up to Highest Surface Speeds

Philipp Zemella, Thomas Hagemann, Bastian Pfau, Hubert Schwarze
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A019, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14991
https://doi.org/10.1115/GT2020-14991
View Paper titled, Identification of Dynamic Coefficients of a Five-Pad Tilting Pad Journal Bearing up to Highest Surface Speeds
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Topics: Journal bearings, Bearings, Stress, Damping, Excitation, Flow (Dynamics), Stiffness, Rotors, Algorithms, Deflection
Journal Articles

Theoretical and Experimental Analyses of Directly Lubricated Tilting-Pad Journal Bearings With Leading Edge Groove

Thomas Hagemann, Hubert Schwarze
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2019, 141(5): 051010.
Paper No: GTP-18-1354
https://doi.org/10.1115/1.4041026
Published Online: December 12, 2018
View Article titled, Theoretical and Experimental Analyses of Directly Lubricated Tilting-Pad Journal Bearings With Leading Edge Groove
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Topics: Bearings, Boundary-value problems, Design, Flow (Dynamics), Journal bearings, Lubricants, Lubrication, Pressure, Temperature, Stress
Journal Articles

Optimization of a 900 mm Tilting-Pad Journal Bearing in Large Steam Turbines by Advanced Modeling and Validation

Ümit Mermertas, Thomas Hagemann, Clément Brichart
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2019, 141(2): 021033.
Paper No: GTP-18-1430
https://doi.org/10.1115/1.4041116
Published Online: October 29, 2018
View Article titled, Optimization of a 900 mm Tilting-Pad Journal Bearing in Large Steam Turbines by Advanced Modeling and Validation
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Topics: Bearings, Modeling, Temperature, Design, Optimization, Deformation
Journal Articles

A Model for Oil Flow and Fluid Temperature Inlet Mixing in Hydrodynamic Journal Bearings

Thomas Hagemann, Hubert Schwarze
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. February 2019, 141(2): 021701.
Paper No: TRIB-18-1190
https://doi.org/10.1115/1.4041211
Published Online: October 11, 2018
View Article titled, A Model for Oil Flow and Fluid Temperature Inlet Mixing in Hydrodynamic Journal Bearings
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Topics: Flow (Dynamics), Temperature, Bearings, Lubricants, Fluids, Pressure
Proceedings Papers

Optimization of a 900 mm Tilting-Pad Journal Bearing in Large Steam Turbines by Advanced Modeling and Validation

Ümit Mermertas, Thomas Hagemann, Clément Brichart
Proc. ASME. GT2018, Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines, V008T29A035, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-76766
https://doi.org/10.1115/GT2018-76766
View Paper titled, Optimization of a 900 mm Tilting-Pad Journal Bearing in Large Steam Turbines by Advanced Modeling and Validation
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Topics: Journal bearings, Modeling, Optimization, Steam turbines, Bearings, Rotors, Temperature, Clearances (Engineering), Computation, Computer software
Proceedings Papers

Theoretical and Experimental Analyses of Directly Lubricated Tilting-Pad Journal Bearings With Leading Edge Groove

Thomas Hagemann, Hubert Schwarze
Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A021, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75659
https://doi.org/10.1115/GT2018-75659
View Paper titled, Theoretical and Experimental Analyses of Directly Lubricated Tilting-Pad Journal Bearings With Leading Edge Groove
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Topics: Experimental analysis, Journal bearings, Bearings, Design, Flow (Dynamics), Stress, Lubrication, Bearing design, Boundary-value problems, Clearances (Engineering)
Proceedings Papers

Potentials and Limitations of an Extended Approximation Method for Nonlinear Dynamic Journal and Thrust Bearing Forces

Daniel Vetter, Thomas Hagemann, Hubert Schwarze
Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A022, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75662
https://doi.org/10.1115/GT2018-75662
View Paper titled, Potentials and Limitations of an Extended Approximation Method for Nonlinear Dynamic Journal and Thrust Bearing Forces
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Topics: Approximation, Thrust bearings, Bearings, Simulation, Algorithms, Cavitation, Journal bearings, Differential equations, Errors, Modeling
Proceedings Papers

A Study on Energetic and Hydraulic Interaction of Combined Journal and Thrust Bearings

Thomas Hagemann, Hardwig Blumenthal, Christian Kraft, Hubert Schwarze
Proc. ASME. GT2015, Volume 7A: Structures and Dynamics, V07AT31A019, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-43460
https://doi.org/10.1115/GT2015-43460
View Paper titled, A Study on Energetic and Hydraulic Interaction of Combined Journal and Thrust Bearings
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Topics: Thrust bearings, Bearings, Thrust, Journal bearings, Stress, Boundary-value problems, Design, Flow (Dynamics), Lubrication, Pressure
Proceedings Papers

Measurement and Prediction of the Dynamic Characteristics of a Large Turbine Tilting-Pad Bearing Under High Circumferential Speeds

Sebastian Kukla, Thomas Hagemann, Hubert Schwarze
Proc. ASME. GT2013, Volume 7B: Structures and Dynamics, V07BT30A020, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95074
https://doi.org/10.1115/GT2013-95074
View Paper titled, Measurement and Prediction of the Dynamic Characteristics of a Large Turbine Tilting-Pad Bearing Under High Circumferential Speeds
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Topics: Bearings, Turbines, Stress, Theoretical analysis, Clearances (Engineering), Elasticity, Fluid films, Fourier analysis, Generators, Pressure
Proceedings Papers

Measurement and Prediction of the Static Operating Conditions of a Large Turbine Tilting-Pad Bearing Under High Circumferential Speeds and Heavy Loads

Thomas Hagemann, Sebastian Kukla, Hubert Schwarze
Proc. ASME. GT2013, Volume 7B: Structures and Dynamics, V07BT30A019, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95004
https://doi.org/10.1115/GT2013-95004
View Paper titled, Measurement and Prediction of the Static Operating Conditions of a Large Turbine Tilting-Pad Bearing Under High Circumferential Speeds and Heavy Loads
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Topics: Bearings, Stress, Turbines, Temperature, Pressure, Clearances (Engineering), Computer software, Deformation, Film thickness, Flow (Dynamics)