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Proceedings Papers

Dated: Guidelines for Creating Synthetic Datasets for Engineering Design Applications

Cyril Picard, Jürg Schiffmann, Faez Ahmed
Proc. ASME. IDETC-CIE2023, Volume 3A: 49th Design Automation Conference (DAC), V03AT03A015, August 20–23, 2023
Publisher: American Society of Mechanical Engineers
Paper No: DETC2023-111609
https://doi.org/10.1115/DETC2023-111609
View Paper titled, Dated: Guidelines for Creating Synthetic Datasets for Engineering Design Applications
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Topics: Engineering design, Artificial intelligence, Compressors, Design, Sampling methods, Tradeoffs, Turbochargers
Proceedings Papers

An Integrated Approach to Designing Robust Turbocompressors on Gas Bearings Through Surrogate Modeling and Constrained Multi-Objective Optimization

Soheyl Massoudi, Cyril Picard, Jürg Schiffmann
Proc. ASME. IDETC-CIE2023, Volume 3B: 49th Design Automation Conference (DAC), V03BT03A069, August 20–23, 2023
Publisher: American Society of Mechanical Engineers
Paper No: DETC2023-115201
https://doi.org/10.1115/DETC2023-115201
View Paper titled, An Integrated Approach to Designing Robust Turbocompressors on Gas Bearings Through Surrogate Modeling and Constrained Multi-Objective Optimization
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Topics: Artificial neural networks, Design, Gas bearings, Metamodeling, Pareto optimization
Journal Articles

Robust Design of Herringbone Grooved Journal Bearings Using Multi-Objective Optimization With Artificial Neural Networks

Soheyl Massoudi, Jürg Schiffmann
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. November 2023, 145(11): 111010.
Paper No: TURBO-23-1158
https://doi.org/10.1115/1.4063392
Published Online: October 4, 2023
View Article titled, Robust Design of Herringbone Grooved Journal Bearings Using Multi-Objective Optimization With Artificial Neural Networks
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Topics: Artificial neural networks, Bearings, Design, Journal bearings, Manufacturing, Optimization, Pareto optimization, Robustness, Rotors, Clearances (Engineering)
Proceedings Papers

Parametric Reduced Order Model of a Gas Bearings Supported Rotor

Dimitri Goutaudier, Jürg Schiffmann, Fabio Nobile
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT26A009, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102519
https://doi.org/10.1115/GT2023-102519
View Paper titled, Parametric Reduced Order Model of a Gas Bearings Supported Rotor
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Topics: Gas bearings, Rotors
Proceedings Papers

Robust Design of Herringbone Grooved Journal Bearings Using Multi-Objective Optimization With Artificial Neural Networks

Soheyl Massoudi, Jürg Schiffmann
Proc. ASME. GT2023, Volume 13D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V13DT34A013, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102428
https://doi.org/10.1115/GT2023-102428
View Paper titled, Robust Design of Herringbone Grooved Journal Bearings Using Multi-Objective Optimization With Artificial Neural Networks
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Topics: Artificial neural networks, Design, Journal bearings, Manufacturing, Pareto optimization, Turbomachinery
Journal Articles

Stability and Unbalance Analysis of Rigid Rotors Supported by Spiral Groove Bearings: Comparison of Different Approaches

Elia Iseli, Jürg Schiffmann
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2021, 143(12): 121008.
Paper No: GTP-21-1350
https://doi.org/10.1115/1.4052025
Published Online: October 4, 2021
View Article titled, Stability and Unbalance Analysis of Rigid Rotors Supported by Spiral Groove Bearings: Comparison of Different Approaches
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Topics: Bearings, Compressibility, Rotors, Stability, Transients (Dynamics), Inertia (Mechanics), Transient analysis
Proceedings Papers

Stability and Unbalance Analysis of Rigid Rotors Supported by Spiral Groove Bearings: Comparison of Different Approaches

Elia Iseli, Jürg Schiffmann
Proc. ASME. GT2021, Volume 6: Ceramics and Ceramic Composites; Coal, Biomass, Hydrogen, and Alternative Fuels; Microturbines, Turbochargers, and Small Turbomachines, V006T19A013, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59513
https://doi.org/10.1115/GT2021-59513
View Paper titled, Stability and Unbalance Analysis of Rigid Rotors Supported by Spiral Groove Bearings: Comparison of Different Approaches
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Topics: Bearings, Rotors, Stability, Compressibility, Gas bearings, Transients (Dynamics), Center of mass, Equations of motion, Excitation, Fluids
Journal Articles

Theoretical and Experimental Investigation of a 34 Watt Radial-Inflow Steam Turbine With Partial Admission

Patrick H. Wagner, Jan Van herle, Jürg Schiffmann
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2021, 143(8): 081002.
Paper No: GTP-20-1474
https://doi.org/10.1115/1.4049483
Published Online: March 31, 2021
View Article titled, Theoretical and Experimental Investigation of a 34 Watt Radial-Inflow Steam Turbine With Partial Admission
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Topics: Turbines, Rotors, Blades, Flow (Dynamics)
Journal Articles

Experimental Investigation of a Small-Scale Organic Rankine Cycle Turbo-Generator Supported on Gas-Lubricated Bearings

Kévin Rosset, Olivier Pajot, Jürg Schiffmann
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2021, 143(5): 051015.
Paper No: GTP-20-1562
https://doi.org/10.1115/1.4049988
Published Online: March 11, 2021
View Article titled, Experimental Investigation of a Small-Scale Organic Rankine Cycle Turbo-Generator Supported on Gas-Lubricated Bearings
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Topics: Bearings, Fluids, Organic Rankine cycle, Pressure, Pumps, Rotors, Turbines, Turbogenerators, Engineering prototypes, Stress
Proceedings Papers

Theoretical and Experimental Investigation of a 34 Watt Radial-Inflow Steam Turbine With Partial-Admission

Patrick H. Wagner, Jan Van herle, Jürg Schiffmann
Proc. ASME. GT2020, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V008T20A023, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15804
https://doi.org/10.1115/GT2020-15804
View Paper titled, Theoretical and Experimental Investigation of a 34 Watt Radial-Inflow Steam Turbine With Partial-Admission
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Topics: Inflow, Steam turbines, Blades, Design, Rotors, Steam, Flow (Dynamics), Turbines, Bearings, Chords (Trusses)
Proceedings Papers

Influence of Large Relative Tip Clearances for a Micro Radial Fan and Design Guidelines for Increased Efficiency

Patrick H. Wagner, Jan Van herle, Lili Gu, Jürg Schiffmann
Proc. ASME. GT2020, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V008T20A025, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15994
https://doi.org/10.1115/GT2020-15994
View Paper titled, Influence of Large Relative Tip Clearances for a Micro Radial Fan and Design Guidelines for Increased Efficiency
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Topics: Design, Blades, Clearances (Engineering), Computational fluid dynamics, Computer simulation, Engineering simulation, Fans, Gas bearings, Pressure, Reynolds number
Proceedings Papers

Automated Design Tool for Automotive Control Actuators

Cyril Picard, Jürg Schiffmann
Proc. ASME. IDETC-CIE2020, Volume 11B: 46th Design Automation Conference (DAC), V11BT11A027, August 17–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: DETC2020-22390
https://doi.org/10.1115/DETC2020-22390
View Paper titled, Automated Design Tool for Automotive Control Actuators
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Topics: Actuators, Design, Automotive industry, Decision making, Electromechanical actuators, Engineers, Laptop computers, Modeling, Optimization, Packaging
Journal Articles

Experimental Assessment of a 3D-Printed Stainless Steel Gas Foil Bearing

Karim Shalash, Jürg Schiffmann
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. August 2020, 142(8): 081802.
Paper No: TRIB-19-1435
https://doi.org/10.1115/1.4047193
Published Online: June 5, 2020
View Article titled, Experimental Assessment of a 3D-Printed Stainless Steel Gas Foil Bearing
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Topics: Additive manufacturing, Bearings, Foil bearings, Manufacturing, Rotors, Stainless steel, Design, Melting, Lasers
Journal Articles

Extended Windage Loss Models for Gas Bearing Supported Spindles Operated in Dense Gases

Kévin Rosset, Jürg Schiffmann
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2020, 142(6): 061010.
Paper No: GTP-19-1651
https://doi.org/10.1115/1.4047124
Published Online: May 29, 2020
View Article titled, Extended Windage Loss Models for Gas Bearing Supported Spindles Operated in Dense Gases
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Topics: Bearings, Cylinders, Flow (Dynamics), Friction, Gas bearings, Journal bearings, Laminar flow, Rotating disks, Skin friction (Fluid dynamics), Thrust bearings
Journal Articles

The Role of Reynolds Number Effect and Tip Leakage in Compressor Geometry Scaling at Low Turbulent Reynolds Numbers

Markus Diehl, Christoph Schreiber, Jürg Schiffmann
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2020, 142(3): 031003.
Paper No: TURBO-19-1047
https://doi.org/10.1115/1.4045465
Published Online: February 20, 2020
View Article titled, The Role of Reynolds Number Effect and Tip Leakage in Compressor Geometry Scaling at Low Turbulent Reynolds Numbers
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Topics: Clearances (Engineering), Compressors, Flow (Dynamics), Reynolds number, Leakage, Design, Geometry
Journal Articles

Theoretical and Experimental Investigation of a Small-Scale, High-Speed, and Oil-Free Radial Anode Off-Gas Recirculation Fan for Solid Oxide Fuel Cell Systems

Patrick H. Wagner, Jan Van herle, Jürg Schiffmann
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2020, 142(4): 041023.
Paper No: GTP-19-1480
https://doi.org/10.1115/1.4045104
Published Online: February 14, 2020
View Article titled, Theoretical and Experimental Investigation of a Small-Scale, High-Speed, and Oil-Free Radial Anode Off-Gas Recirculation Fan for Solid Oxide Fuel Cell Systems
Open the PDF for Theoretical and Experimental Investigation of a Small-Scale, High-Speed, and Oil-Free Radial Anode Off-Gas Recirculation Fan for Solid Oxide Fuel Cell Systems in another window
Topics: Anodes, Bearings, Blades, Design, Flow (Dynamics), Fluids, Heat, Impellers, Leakage, Pressure
Journal Articles

Pressure Profile Measurements Within the Gas Film of Journal Foil Bearings Using an Instrumented Rotor With Telemetry

Karim Shalash, Jürg Schiffmann
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2020, 142(3): 031013.
Paper No: GTP-19-1356
https://doi.org/10.1115/1.4044798
Published Online: February 3, 2020
View Article titled, Pressure Profile Measurements Within the Gas Film of Journal Foil Bearings Using an Instrumented Rotor With Telemetry
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Topics: Bearings, Foil bearings, Pressure, Rotors, Stress
Journal Articles

An Instrumented High-Speed Rotor With Embedded Telemetry for the Continuous Spatial Pressure Profile Measurement in Gas Lubricated Bearings: A Proof of Concept

Karim Shalash, Jürg Schiffmann
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2020, 142(4): 041006.
Paper No: GTP-19-1357
https://doi.org/10.1115/1.4044797
Published Online: January 29, 2020
View Article titled, An Instrumented High-Speed Rotor With Embedded Telemetry for the Continuous Spatial Pressure Profile Measurement in Gas Lubricated Bearings: A Proof of Concept
Open the PDF for An Instrumented High-Speed Rotor With Embedded Telemetry for the Continuous Spatial Pressure Profile Measurement in Gas Lubricated Bearings: A Proof of Concept in another window
Topics: Bearings, Pressure, Rotors, Probes, Telemetry
Journal Articles

Analysis of Spiral-Grooved Gas Journal Bearings by the Narrow-Groove Theory and the Finite Element Method At Large Eccentricities

Elia Iseli, Eliott Guenat, Roger Tresch, Jürg Schiffmann
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 2020, 142(4): 041802.
Paper No: TRIB-19-1293
https://doi.org/10.1115/1.4045636
Published Online: January 23, 2020
View Article titled, Analysis of Spiral-Grooved Gas Journal Bearings by the Narrow-Groove Theory and the Finite Element Method At Large Eccentricities
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Topics: Bearings, Finite element methods, Compressibility, Pressure
Proceedings Papers

Theoretical and Experimental Investigation of a Small-Scale, High-Speed, and Oil-Free Radial Anode Off-Gas Recirculation Fan for Solid Oxide Fuel Cell Systems

Patrick H. Wagner, Jan Van herle, Jürg Schiffmann
Proc. ASME. GT2019, Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines, V008T26A019, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91361
https://doi.org/10.1115/GT2019-91361
View Paper titled, Theoretical and Experimental Investigation of a Small-Scale, High-Speed, and Oil-Free Radial Anode Off-Gas Recirculation Fan for Solid Oxide Fuel Cell Systems
Open the PDF for Theoretical and Experimental Investigation of a Small-Scale, High-Speed, and Oil-Free Radial Anode Off-Gas Recirculation Fan for Solid Oxide Fuel Cell Systems in another window
Topics: Anodes, Solid oxide fuel cells, Flow (Dynamics), Bearings, Blades, Computational fluid dynamics, Design, Design engineering, Fluids, Gas bearings