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Journal Articles

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

Elia Iseli, Jürg Schiffmann

J. Eng. Gas Turbines Power. December 2021, 143(12): 121008.

Paper No: GTP-21-1350

DOI: https://doi.org/10.1115/1.4052025

Published Online: October 4, 2021

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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

Paper No: GT2021-59513

DOI: https://doi.org/10.1115/GT2021-59513

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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

J. Eng. Gas Turbines Power. August 2021, 143(8): 081002.

Paper No: GTP-20-1474

DOI: https://doi.org/10.1115/1.4049483

Published Online: March 31, 2021

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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

J. Eng. Gas Turbines Power. May 2021, 143(5): 051015.

Paper No: GTP-20-1562

DOI: https://doi.org/10.1115/1.4049988

Published Online: March 11, 2021

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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

Paper No: GT2020-15804

DOI: https://doi.org/10.1115/GT2020-15804

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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

Paper No: GT2020-15994

DOI: https://doi.org/10.1115/GT2020-15994

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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

Paper No: DETC2020-22390

DOI: https://doi.org/10.1115/DETC2020-22390

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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

J. Tribol. August 2020, 142(8): 081802.

Paper No: TRIB-19-1435

DOI: https://doi.org/10.1115/1.4047193

Published Online: June 5, 2020

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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

J. Eng. Gas Turbines Power. June 2020, 142(6): 061010.

Paper No: GTP-19-1651

DOI: https://doi.org/10.1115/1.4047124

Published Online: May 29, 2020

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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

J. Turbomach. March 2020, 142(3): 031003.

Paper No: TURBO-19-1047

DOI: https://doi.org/10.1115/1.4045465

Published Online: February 20, 2020

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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

J. Eng. Gas Turbines Power. April 2020, 142(4): 041023.

Paper No: GTP-19-1480

DOI: https://doi.org/10.1115/1.4045104

Published Online: February 14, 2020

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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

J. Eng. Gas Turbines Power. March 2020, 142(3): 031013.

Paper No: GTP-19-1356

DOI: https://doi.org/10.1115/1.4044798

Published Online: February 3, 2020

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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

J. Eng. Gas Turbines Power. April 2020, 142(4): 041006.

Paper No: GTP-19-1357

DOI: https://doi.org/10.1115/1.4044797

Published Online: January 29, 2020

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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

J. Tribol. April 2020, 142(4): 041802.

Paper No: TRIB-19-1293

DOI: https://doi.org/10.1115/1.4045636

Published Online: January 23, 2020

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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

Paper No: GT2019-91361

DOI: https://doi.org/10.1115/GT2019-91361

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Topics: Anodes, Solid oxide fuel cells, Flow (Dynamics), Bearings, Blades, Computational fluid dynamics, Design, Design engineering, Fluids, Gas bearings

Journal Articles

A Review of Grooved Dynamic Gas Bearings

Lili Gu, Eliott Guenat, Jürg Schiffmann

Appl. Mech. Rev. January 2020, 72(1): 010802.

Paper No: AMR-19-1008

DOI: https://doi.org/10.1115/1.4044191

Published Online: October 30, 2019

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Topics: Bearings, Design, Gas bearings, Stress, Rotors, Optimization, Pressure, Fluid films, Thrust bearings

Journal Articles

Thin Gas Film Isothermal Condensation in Aerodynamic Bearings

Eliott Guenat, Jürg Schiffmann

J. Tribol. November 2019, 141(11): 111701.

Paper No: TRIB-19-1159

DOI: https://doi.org/10.1115/1.4044447

Published Online: September 7, 2019

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Topics: Bearings, Condensation, Pressure, Stress, Density, Journal bearings

Journal Articles

Erratum: “Data-Driven Predesign Tool for Small-Scale Centrifugal Compressor in Refrigeration” [ASME J. Eng. Gas Turbines Power, 140 (12), p. 121011; DOI: 10.1115/1.4040845 ]

Violette Mounier, Cyril Picard, Jürg Schiffmann

J. Eng. Gas Turbines Power. October 2019, 141(10): 107001.

Paper No: GTP-19-1255

DOI: https://doi.org/10.1115/1.4044050

Published Online: August 2, 2019

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Topics: Compressors, Gas turbines, Refrigeration

Journal Articles

Data-Driven Model for the Dynamic Characteristics of O-Rings for Gas Bearing Supported Rotors

Philipp Bättig, Jürg Schiffmann

J. Appl. Mech. August 2019, 86(8): 081003.

Paper No: JAM-18-1722

DOI: https://doi.org/10.1115/1.4043473

Published Online: May 13, 2019

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Topics: Damping, Seals, Stiffness, Nitrile rubber

Proceedings Papers

Data-Driven Pre-Design Tool for Small Scale Centrifugal Compressors in Refrigeration

Violette Mounier, Cyril Picard, Jürg Schiffmann

Proc. ASME. GT2018, Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines, V008T26A012, June 11–15, 2018

Paper No: GT2018-76349

DOI: https://doi.org/10.1115/GT2018-76349

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Topics: Compressors, Design, Refrigeration, Blades, Geometry, Air conditioners, Bearings, Clearances (Engineering), Exhaust systems, Fluids

Journal citation

NARROW

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

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

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

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

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

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

Automated Design Tool for Automotive Control Actuators

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

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

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

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

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

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

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

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

A Review of Grooved Dynamic Gas Bearings

Thin Gas Film Isothermal Condensation in Aerodynamic Bearings

Erratum: “Data-Driven Predesign Tool for Small-Scale Centrifugal Compressor in Refrigeration” [ASME J. Eng. Gas Turbines Power, 140 (12), p. 121011; DOI: 10.1115/1.4040845 ]

Data-Driven Model for the Dynamic Characteristics of O-Rings for Gas Bearing Supported Rotors

Data-Driven Pre-Design Tool for Small Scale Centrifugal Compressors in Refrigeration

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