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Proceedings Papers

Frequency Dependancy of Dynamic Force Coefficients for Hermetic Squeeze Film Dampers Utilizing Fluid-Bounding Flexible Structures

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A020, June 7–11, 2021

Paper No: GT2021-60007

DOI: https://doi.org/10.1115/GT2021-60007

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Topics: Dampers, Flexible structures, Fluids, Design, Fluid structure interaction, Computational fluid dynamics, Finite element analysis, Architecture, Bearing design, Computer software

Journal Articles

Additively Manufactured Compliant Hybrid Gas Thrust Bearing for Supercritical Carbon Dioxide Turbomachinery: Experimental Evaluation and Fluid–Structure Model Predictions

Bugra Ertas, Keith Gary, Adolfo Delgado

J. Eng. Gas Turbines Power. August 2021, 143(8): 081023.

Paper No: GTP-20-1671

DOI: https://doi.org/10.1115/1.4050864

Published Online: May 7, 2021

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Topics: Bearings, Fluids, Stress, Thrust, Thrust bearings, Turbomachinery, Pressure, Clearances (Engineering), Flow (Dynamics), Supercritical carbon dioxide

Journal Articles

Additively Manufactured Compliant Hybrid Gas Thrust Bearing for Supercritical Carbon Dioxide Turbomachinery: Design and Proof of Concept Testing

Bugra Ertas

J. Eng. Gas Turbines Power. August 2021, 143(8): 081024.

Paper No: GTP-20-1710

DOI: https://doi.org/10.1115/1.4050865

Published Online: May 7, 2021

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Topics: Bearings, Design, Stress, Testing, Thrust, Thrust bearings, Turbomachinery, Additive manufacturing, Springs, Stiffness

Proceedings Papers

Additively Manufactured Compliant Hybrid Gas Thrust Bearing for sCO 2 Turbomachinery: Experimental Evaluation and Fluid-Structure Model Predictions

Bugra Ertas, Keith Gary, Adolfo Delgado

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A018, September 21–25, 2020

Paper No: GT2020-14964

DOI: https://doi.org/10.1115/GT2020-14964

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Topics: Additive manufacturing, Fluids, Thrust bearings, Turbomachinery, Stress, Bearings, Pressure, Hydrostatics, Thrust, Deflection

Proceedings Papers

A General-Purpose Test Facility for Evaluating Gas Lubricated Thrust Bearings

Keith Gary, Bugra Ertas, Adolfo Delgado

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A027, September 21–25, 2020

Paper No: GT2020-15520

DOI: https://doi.org/10.1115/GT2020-15520

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Topics: Test facilities, Thrust bearings, Bearings, Fluids, Design, Gas turbines, Hydrostatics, Lubricants, Stress, Testing

Proceedings Papers

Additively Manufactured Compliant Hybrid Gas Thrust Bearing for sCO 2 Turbomachinery: Design and Proof of Concept Testing

Bugra Ertas

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A017, September 21–25, 2020

Paper No: GT2020-14959

DOI: https://doi.org/10.1115/GT2020-14959

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Topics: Additive manufacturing, Design, Testing, Thrust bearings, Turbomachinery, Bearings, Thrust, Deflection, Stiffness, Clearances (Engineering)

Journal Articles

Experimental Rotordynamic Force Coefficients for a Diffusion Bonded Compliant Hybrid Journal Gas Bearing Utilizing Fluid-Filled Hermetic Dampers

Keith Gary, Bugra Ertas

J. Eng. Gas Turbines Power. April 2020, 142(4): 041008.

Paper No: GTP-19-1373

DOI: https://doi.org/10.1115/1.4044643

Published Online: January 29, 2020

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Topics: Bearings, Dampers, Damping, Diffusion (Physics), Gas bearings, Rotors, Stress, Fluids, Excitation, Stiffness

Proceedings Papers

Compliant Hybrid Gas Bearing Using Integral Hermetically-Sealed Squeeze Film Dampers

Bugra Ertas

Proc. ASME. GT2019, Volume 7B: Structures and Dynamics, V07BT34A023, June 17–21, 2019

Paper No: GT2019-90865

DOI: https://doi.org/10.1115/GT2019-90865

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Topics: Dampers, Gas bearings, Bearings, Cavities, Vibration, Bearing design, Damping, Design, Excitation, Fluid structure interaction

Proceedings Papers

Experimental Rotordynamic Force Coefficients for a Diffusion Bonded Compliant Hybrid Journal Gas Bearing Utilizing Fluid-Filled Hermetic Dampers

Keith Gary, Bugra Ertas

Proc. ASME. GT2019, Volume 7B: Structures and Dynamics, V07BT34A029, June 17–21, 2019

Paper No: GT2019-91109

DOI: https://doi.org/10.1115/GT2019-91109

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Topics: Dampers, Diffusion (Physics), Fluids, Gas bearings, Bearings, Damping, Excitation, Rotors, Stress, Design

Journal Articles

Compliant Hybrid Gas Bearing Using Integral Hermetically Sealed Squeeze Film Dampers

Bugra Ertas

J. Eng. Gas Turbines Power. October 2019, 141(10): 101020.

Paper No: GTP-19-1384

DOI: https://doi.org/10.1115/1.4044644

Published Online: September 20, 2019

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Topics: Bearings, Dampers, Damping, Stiffness, Fluids, Design, Cavities, Fluid structure interaction, Diaphragms (Mechanical devices), Diaphragms (Structural)

Journal Articles

Dynamic Characterization of a Novel Externally Pressurized Compliantly Damped Gas-Lubricated Bearing With Hermetically Sealed Squeeze Film Damper Modules

Adolfo Delgado, Bugra Ertas

J. Eng. Gas Turbines Power. February 2019, 141(2): 021028.

Paper No: GTP-18-1423

DOI: https://doi.org/10.1115/1.4041311

Published Online: October 16, 2018

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Topics: Bearings, Dampers, Design, Damping, Stiffness, Stress, Rotors

Journal Articles

Hermetically Sealed Squeeze Film Damper for Operation in Oil-Free Environments

Bugra Ertas, Adolfo Delgado

J. Eng. Gas Turbines Power. February 2019, 141(2): 022503.

Paper No: GTP-18-1421

DOI: https://doi.org/10.1115/1.4041520

Published Online: October 15, 2018

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Topics: Dampers, Damping, Cavities, Fluids, Stiffness, Vibration

Journal Articles

Compliant Hybrid Gas Bearing Using Modular Hermetically Sealed Squeeze Film Dampers

Bugra Ertas, Adolfo Delgado

J. Eng. Gas Turbines Power. February 2019, 141(2): 022504.

Paper No: GTP-18-1422

DOI: https://doi.org/10.1115/1.4041310

Published Online: October 15, 2018

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Topics: Bearings, Dampers, Damping, Gas bearings, Flow (Dynamics), Stress, Stiffness

Proceedings Papers

Hermetically Sealed Squeeze Film Damper for Operation in Oil-Free Environments

Bugra Ertas, Adolfo Delgado

Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A035, June 11–15, 2018

Paper No: GT2018-76308

DOI: https://doi.org/10.1115/GT2018-76308

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Topics: Dampers, Damping, Cavitation, Flow (Dynamics), Gas bearings, Stiffness, Clearances (Engineering), Bearings, Cavities, Density

Proceedings Papers

Compliant Hybrid Gas Bearing Using Modular Hermetically-Sealed Squeeze Film Dampers

Bugra Ertas, Adolfo Delgado

Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A036, June 11–15, 2018

Paper No: GT2018-76312

DOI: https://doi.org/10.1115/GT2018-76312

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Topics: Dampers, Gas bearings, Bearings, Damping, Stress, Flow (Dynamics), Testing, Bearing design, Carbon, Cavities

Proceedings Papers

Dynamic Characterization of a Novel Externally Pressurized Compliantly Damped Gas-Lubricated Bearing With Hermetically Sealed Squeeze Film Damper Modules

Adolfo Delgado, Bugra Ertas

Proc. ASME. GT2018, Volume 7B: Structures and Dynamics, V07BT34A050, June 11–15, 2018

Paper No: GT2018-77212

DOI: https://doi.org/10.1115/GT2018-77212

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Topics: Bearings, Dampers, Damping, Design, Rotors, Gas bearings, Metals, Stiffness, Stress, Turbomachinery

Journal Articles

Dynamic Force Coefficients of Hydrostatic Gas Films for Recessed Flat Plates: Experimental Identification and Numerical Predictions

Adolfo Delgado, Bugra Ertas

J. Tribol. November 2018, 140(6): 061703.

Paper No: TRIB-17-1305

DOI: https://doi.org/10.1115/1.4040114

Published Online: May 21, 2018

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Topics: Damping, Excitation, Film thickness, Flat plates, Flow (Dynamics), Hydrostatics, Pressure, Stiffness, Bearings, Leakage

Journal Articles

Dynamic Characterization of an Integral Squeeze Film Bearing Support Damper for a Supercritical Co 2 Expander

Bugra Ertas, Adolfo Delgado, Jeffrey Moore

J. Eng. Gas Turbines Power. May 2018, 140(5): 052501.

Paper No: GTP-17-1261

DOI: https://doi.org/10.1115/1.4038121

Published Online: November 14, 2017

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Topics: Dampers, Damping, Vibration, Clearances (Engineering), Excitation, Bearings

Proceedings Papers

Dynamic Characterization of an Integral Squeeze Film Bearing Support Damper for a Supercritical CO 2 Expander

Bugra Ertas, Adolfo Delgado, Jeffrey Moore

Proc. ASME. GT2017, Volume 7A: Structures and Dynamics, V07AT34A009, June 26–30, 2017

Paper No: GT2017-63448

DOI: https://doi.org/10.1115/GT2017-63448

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Topics: Bearings, Dampers, Supercritical carbon dioxide, Damping, Inertia (Mechanics), Stiffness, Cavitation, Testing, Accounting, Carbon dioxide

Journal Articles

Stabilizing a 46 MW Multistage Utility Steam Turbine Using Integral Squeeze Film Bearing Support Dampers

Bugra Ertas, Vaclav Cerny, Jongsoo Kim, Vaclav Polreich

J. Eng. Gas Turbines Power. May 2015, 137(5): 052506.

Paper No: GTP-14-1349

DOI: https://doi.org/10.1115/1.4028715

Published Online: May 1, 2015

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Topics: Bearings, Dampers, Rotors, Steam turbines, Vibration, Damping, Turbines, Stiffness

Journal citation

NARROW

Frequency Dependancy of Dynamic Force Coefficients for Hermetic Squeeze Film Dampers Utilizing Fluid-Bounding Flexible Structures

Additively Manufactured Compliant Hybrid Gas Thrust Bearing for Supercritical Carbon Dioxide Turbomachinery: Experimental Evaluation and Fluid–Structure Model Predictions

Additively Manufactured Compliant Hybrid Gas Thrust Bearing for Supercritical Carbon Dioxide Turbomachinery: Design and Proof of Concept Testing

Additively Manufactured Compliant Hybrid Gas Thrust Bearing for sCO 2 Turbomachinery: Experimental Evaluation and Fluid-Structure Model Predictions

A General-Purpose Test Facility for Evaluating Gas Lubricated Thrust Bearings

Additively Manufactured Compliant Hybrid Gas Thrust Bearing for sCO 2 Turbomachinery: Design and Proof of Concept Testing

Experimental Rotordynamic Force Coefficients for a Diffusion Bonded Compliant Hybrid Journal Gas Bearing Utilizing Fluid-Filled Hermetic Dampers

Compliant Hybrid Gas Bearing Using Integral Hermetically-Sealed Squeeze Film Dampers

Experimental Rotordynamic Force Coefficients for a Diffusion Bonded Compliant Hybrid Journal Gas Bearing Utilizing Fluid-Filled Hermetic Dampers

Compliant Hybrid Gas Bearing Using Integral Hermetically Sealed Squeeze Film Dampers

Dynamic Characterization of a Novel Externally Pressurized Compliantly Damped Gas-Lubricated Bearing With Hermetically Sealed Squeeze Film Damper Modules

Hermetically Sealed Squeeze Film Damper for Operation in Oil-Free Environments

Compliant Hybrid Gas Bearing Using Modular Hermetically Sealed Squeeze Film Dampers

Hermetically Sealed Squeeze Film Damper for Operation in Oil-Free Environments

Compliant Hybrid Gas Bearing Using Modular Hermetically-Sealed Squeeze Film Dampers

Dynamic Characterization of a Novel Externally Pressurized Compliantly Damped Gas-Lubricated Bearing With Hermetically Sealed Squeeze Film Damper Modules

Dynamic Force Coefficients of Hydrostatic Gas Films for Recessed Flat Plates: Experimental Identification and Numerical Predictions

Dynamic Characterization of an Integral Squeeze Film Bearing Support Damper for a Supercritical Co 2 Expander

Dynamic Characterization of an Integral Squeeze Film Bearing Support Damper for a Supercritical CO 2 Expander

Stabilizing a 46 MW Multistage Utility Steam Turbine Using Integral Squeeze Film Bearing Support Dampers

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