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Journal Articles

A Thermal Model for a Hybrid Gas Bearing System in Oil-Free Turbochargers

Accepted Manuscript
Wonbae Jung, Adolfo Delgado, Anthony Dudlo, Sang-Guk Kang, Chol-Bum M. Kweon
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power.
Paper No: GTP-24-1519
https://doi.org/10.1115/1.4066588
Published Online: September 19, 2024
View Article titled, A Thermal Model for a Hybrid Gas Bearing System in Oil-Free Turbochargers
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Topics: Gas bearings, Turbochargers, Rotors, Temperature, Bearings, Thermal energy transport, Viscosity, Algorithms, Damping, Density
Proceedings Papers

A Thermal Model for a Hybrid Gas Bearing System in Oil-Free Turbochargers

Wonbae Jung, Adolfo Delgado, Anthony Dudlo, Sang-Guk Kang, Chol-Bum M. Kweon
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, V10AT22A010, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-125903
https://doi.org/10.1115/GT2024-125903
View Paper titled, A Thermal Model for a Hybrid Gas Bearing System in Oil-Free Turbochargers
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Topics: Gas bearings, Thermal energy transport, Thermohydrodynamics, Turbochargers
Proceedings Papers

Dynamic Response of a Pivot-Mounted Squeeze Film Damper: Measurements and Predictions

Marie Kasprzyk, Adolfo Delgado
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, V10AT22A003, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-123379
https://doi.org/10.1115/GT2024-123379
View Paper titled, Dynamic Response of a Pivot-Mounted Squeeze Film Damper: Measurements and Predictions
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Topics: Dampers, Dynamic response
Proceedings Papers

Dynamic Characterization of a Low Drag Power Loss Tilting Pad Journal Bearing

Roarke Bradley, Adolfo Delgado, Luis San Andrés
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, V10AT22A025, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-129170
https://doi.org/10.1115/GT2024-129170
View Paper titled, Dynamic Characterization of a Low Drag Power Loss Tilting Pad Journal Bearing
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Topics: Drag (Fluid dynamics), Journal bearings, Turbomachinery
Journal Articles

Dynamic Performance of Liquid Smooth Annular Seal Operating in the Transition Regime

Seung Hyeop Hyun, Adolfo Delgado
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2024, 146(9): 091019.
Paper No: GTP-24-1015
https://doi.org/10.1115/1.4064805
Published Online: April 4, 2024
View Article titled, Dynamic Performance of Liquid Smooth Annular Seal Operating in the Transition Regime
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Topics: Damping, Flow (Dynamics), Pressure, Reynolds number, Rotors, Stiffness, Leakage
Proceedings Papers

Dynamic Performance of Liquid Smooth Annular Seal Operating in the Transition Regime

Seung-Hyeop Hyun, Adolfo Delgado
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT22A024, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103158
https://doi.org/10.1115/GT2023-103158
View Paper titled, Dynamic Performance of Liquid Smooth Annular Seal Operating in the Transition Regime
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Topics: Damping, Excitation, Flow (Dynamics), Leakage, Pressure, Reynolds number, Rotors, Stiffness, Turbulence
Proceedings Papers

Design and Parameter Identification of a Compliantly Damped Porous Carbon Hybrid Gas Bearing

Suryanarayan Balaji, Adolfo Delgado, Sang-Guk Kang, Chol-Bum M. Kweon
Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT22A003, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-100904
https://doi.org/10.1115/GT2023-100904
View Paper titled, Design and Parameter Identification of a Compliantly Damped Porous Carbon Hybrid Gas Bearing
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Topics: Bearings, Carbon, Dampers, Design, Gas bearings, Rotors, Stiffness
Journal Articles

Experimental Force Coefficients for a Fully-Partitioned Pocket Damper Seal and Comparison to Other Two Seal Types

Adolfo Delgado, Luis San Andrés, Jing Yang, Jonathan Thiele
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2023, 145(5): 051019.
Paper No: GTP-22-1478
https://doi.org/10.1115/1.4056347
Published Online: January 10, 2023
View Article titled, Experimental Force Coefficients for a Fully-Partitioned Pocket Damper Seal and Comparison to Other Two Seal Types
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Topics: Computational fluid dynamics, Dampers, Damping, Excitation, Flow (Dynamics), Leakage, Pressure, Rotors, Stiffness, Stability
Journal Articles

Stability of a Rotor Partially Filled With Fluid: Test Facility and Experimental Results

Marie Kasprzyk, John Sentmanat, Adolfo Delgado
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2023, 145(4): 041019.
Paper No: GTP-22-1517
https://doi.org/10.1115/1.4055946
Published Online: December 13, 2022
View Article titled, Stability of a Rotor Partially Filled With Fluid: Test Facility and Experimental Results
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Topics: Damping, Fluids, Rotors, Vibration, Waves, Bearings, Whirls
Proceedings Papers

Stability of a Rotor Partially-Filled With Fluid: Test Facility and Experimental Results

Marie Kasprzyk, John Sentmanat, Adolfo Delgado
Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT26A008, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82200
https://doi.org/10.1115/GT2022-82200
View Paper titled, Stability of a Rotor Partially-Filled With Fluid: Test Facility and Experimental Results
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Topics: Fluids, Rotors, Stability, Test facilities, Vibration, Damping, Bearings, Dampers, Excitation, Gas turbines
Proceedings Papers

Experimental Force Coefficients for a Fully-Partitioned Pocket Damper Seal and Comparison to Other Two Seal Types

Adolfo Delgado, Luis San Andrés, Jing Yang, Jonathan Thiele
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, V08AT22A020, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83164
https://doi.org/10.1115/GT2022-83164
View Paper titled, Experimental Force Coefficients for a Fully-Partitioned Pocket Damper Seal and Comparison to Other Two Seal Types
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Topics: Dampers, Leakage, Stiffness, Compressors, Damping, Blades, Pressure, Rotors, Computational fluid dynamics, Databases
Proceedings Papers

Optically Observed Turbulence In Thrust Collars at Low Critical Reynolds Number Including Numerical Predictions

Thomas Kerr, Adolfo Delgado
Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A026, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-60360
https://doi.org/10.1115/GT2021-60360
View Paper titled, Optically Observed Turbulence In Thrust Collars at Low Critical Reynolds Number Including Numerical Predictions
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Topics: Reynolds number, Thrust, Turbulence, Stress, Computational fluid dynamics, Bearings, Flow (Dynamics), Modeling, Particle spin, Rotation
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
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2021, 143(8): 081023.
Paper No: GTP-20-1671
https://doi.org/10.1115/1.4050864
Published Online: May 7, 2021
View Article titled, Additively Manufactured Compliant Hybrid Gas Thrust Bearing for Supercritical Carbon Dioxide Turbomachinery: Experimental Evaluation and Fluid–Structure Model Predictions
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Topics: Bearings, Fluids, Stress, Thrust, Thrust bearings, Turbomachinery, Pressure, Clearances (Engineering), Flow (Dynamics), Supercritical carbon dioxide
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
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14964
https://doi.org/10.1115/GT2020-14964
View Paper titled, Additively Manufactured Compliant Hybrid Gas Thrust Bearing for sCO 2 Turbomachinery: Experimental Evaluation and Fluid-Structure Model Predictions
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Topics: Additive manufacturing, Fluids, Thrust bearings, Turbomachinery, Stress, Bearings, Pressure, Hydrostatics, Thrust, Deflection
Proceedings Papers

Novel Approach for Optical Characterization of Thrust Collar Lubricated Area: Experimental and Numerical Results

Thomas Kerr, Adolfo Delgado
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A025, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15467
https://doi.org/10.1115/GT2020-15467
View Paper titled, Novel Approach for Optical Characterization of Thrust Collar Lubricated Area: Experimental and Numerical Results
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Topics: Thrust, Cavitation, Stress, Turbulence, Computational fluid dynamics, Modeling, Pressure, Algorithms, Bearings, Compressors
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
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15520
https://doi.org/10.1115/GT2020-15520
View Paper titled, A General-Purpose Test Facility for Evaluating Gas Lubricated Thrust Bearings
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Topics: Test facilities, Thrust bearings, Bearings, Fluids, Design, Gas turbines, Hydrostatics, Lubricants, Stress, Testing
Proceedings Papers

A Novel Controlled-Motion Test Rig to Evaluate Effect of Synchronous and Subsynchronous Lateral Vibration on Reliability and Performance of Mechanical Seals in Pumps

Clay S. Norrbin, Adolfo Delgado
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A029, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15749
https://doi.org/10.1115/GT2020-15749
View Paper titled, A Novel Controlled-Motion Test Rig to Evaluate Effect of Synchronous and Subsynchronous Lateral Vibration on Reliability and Performance of Mechanical Seals in Pumps
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Topics: Pumps, Reliability, Vibration, Rotors, Whirls, Flow (Dynamics), Leakage, Mineral oil, Temperature, Clearances (Engineering)
Journal Articles

Novel Approach for Optical Characterization of Thrust Collar Lubricated Area: Experimental and Numerical Results

Thomas Kerr, Adolfo Delgado
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2021, 143(1): 011011.
Paper No: GTP-20-1435
https://doi.org/10.1115/1.4049013
Published Online: January 4, 2021
View Article titled, Novel Approach for Optical Characterization of Thrust Collar Lubricated Area: Experimental and Numerical Results
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Topics: Cavitation, Computational fluid dynamics, Pressure, Stress, Thrust, Finite element analysis, Turbulence, Modeling, Algorithms, Bearings
Journal Articles

Effect of Leakage Flow Path Wear on Axial Thrust in Downhole Electrical Submersible Pump Unit

Abhay Patil, Marie Kasprzyk, Adolfo Delgado, Gerald Morrison
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. May 2020, 142(5): 051202.
Paper No: FE-19-1078
https://doi.org/10.1115/1.4045571
Published Online: February 3, 2020
View Article titled, Effect of Leakage Flow Path Wear on Axial Thrust in Downhole Electrical Submersible Pump Unit
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Topics: Pumps, Thrust, Wear, Flow (Dynamics), Erosion, Impellers, Leakage flows, Pressure
Proceedings Papers

Predictive Model for Two-Phase Flow Performance of Mixed Flow Pumps

Abhay Patil, Burak Ayyildiz, Sahand Pirouzpanah, Adolfo Delgado, Gerald Morrison
Proc. ASME. AJKFluids2019, Volume 3B: Fluid Applications and Systems, V03BT03A040, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5486
https://doi.org/10.1115/AJKFluids2019-5486
View Paper titled, Predictive Model for Two-Phase Flow Performance of Mixed Flow Pumps
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Topics: Flow (Dynamics), Multiphase flow, Pumps, Two-phase flow