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David Ransom
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Proceedings Papers

Analysis and Prediction of the Machine Capacity Required to Meet Net Zero by 2050

Jason Wilkes, Dan Reitz, David Ransom, Doug Hofer, Rainer Kurz, Thomas Kerr, Matthew Holland
Proc. ASME. GT2023, Volume 6: Education; Electric Power; Energy Storage; Fans and Blowers, V006T08A012, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103983
https://doi.org/10.1115/GT2023-103983
View Paper titled, Analysis and Prediction of the Machine Capacity Required to Meet Net Zero by 2050
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Topics: Machinery, Collaboration, Gas turbines, Governments, Heat pumps, Steam turbines, Testing
Proceedings Papers

A Supercritical CO 2 Combined Power and Liquefaction Cycle

Griffin Beck, David Ransom, Kevin Hoopes
Proc. ASME. GT2019, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T38A021, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91371
https://doi.org/10.1115/GT2019-91371
View Paper titled, A Supercritical CO 2 Combined Power and Liquefaction Cycle
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Topics: Cycles, Liquefaction, Supercritical carbon dioxide, Natural gas, Thermodynamic power cycles, Refrigeration, Carbon dioxide, Drilling, Flow (Dynamics), Hydraulic fracturing
Proceedings Papers

Wet Gas Compression: Characterizing Two-Phase Flow Inside a Compressor With Flow Visualization

Melissa Poerner, Ryan Cater, Craig Nolen, Grant Musgrove, David Ransom
Proc. ASME. GT2017, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T27A020, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64541
https://doi.org/10.1115/GT2017-64541
View Paper titled, Wet Gas Compression: Characterizing Two-Phase Flow Inside a Compressor With Flow Visualization
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Topics: Compression, Compressors, Flow visualization, Two-phase flow, Flow (Dynamics), Impellers, Diffusers, Engineering simulation, Gas compressors, Gas flow
Proceedings Papers

Mechanical Design Features of a Small Gas Turbine for Power Generation in Unmanned Aerial Vehicles

Caleb S. Cunningham, David Ransom, Jason Wilkes, John Bishop, Benjamin White
Proc. ASME. GT2015, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T23A021, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-43491
https://doi.org/10.1115/GT2015-43491
View Paper titled, Mechanical Design Features of a Small Gas Turbine for Power Generation in Unmanned Aerial Vehicles
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Topics: Design engineering, Energy generation, Gas turbines, Unmanned aerial vehicles, Design, Bearings, Combustion chambers, Industrial lubrication systems, Additive manufacturing, Manufacturing
Proceedings Papers

Design of a Small Scale Gas Turbine for a Hybrid Propulsion System

Elliott Bryner, David Ransom, John Bishop, Shane Coogan, Grant Musgrove
Proc. ASME. GT2015, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T23A011, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42770
https://doi.org/10.1115/GT2015-42770
View Paper titled, Design of a Small Scale Gas Turbine for a Hybrid Propulsion System
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Topics: Design, Gas turbines, Propulsion systems, Machinery, Fuels, Generators, Unmanned aerial vehicles, Additive manufacturing, Ceramics, Hardware
Journal Articles

An Improved Catcher Bearing Model and an Explanation of the Forward Whirl/Whip Phenomenon Observed in Active Magnetic Bearing Transient Drop Experiments

Jason Wilkes, Jeff Moore, David Ransom, Giuseppe Vannini
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2014, 136(4): 042504.
Paper No: GTP-13-1313
https://doi.org/10.1115/1.4025890
Published Online: December 12, 2013
View Article titled, An Improved Catcher Bearing Model and an Explanation of the Forward Whirl/Whip Phenomenon Observed in Active Magnetic Bearing Transient Drop Experiments
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Topics: Bearings, Rotors, Whirls
Proceedings Papers

An Improved Catcher Bearing Model and an Explanation of the Forward Whirl/Whip Phenomenon Observed in Active Magnetic Bearing Transient Drop Experiments

Jason Wilkes, Giuseppe Vannini, Jeff Moore, David Ransom
Proc. ASME. GT2013, Volume 7B: Structures and Dynamics, V07BT30A015, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94594
https://doi.org/10.1115/GT2013-94594
View Paper titled, An Improved Catcher Bearing Model and an Explanation of the Forward Whirl/Whip Phenomenon Observed in Active Magnetic Bearing Transient Drop Experiments
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Topics: Bearings, Magnetic bearings, Transients (Dynamics), Whirls, Rotors, Engineering simulation, Friction, Simulation, Compressors, Finite element analysis
Proceedings Papers

Measured Performance of Two-Stage Centrifugal Compressor Under Wet Gas Conditions

Matteo Bertoneri, Simone Duni, David Ransom, Luigi Podestà, Massimo Camatti, Manuele Bigi, Melissa Wilcox
Proc. ASME. GT2012, Volume 6: Oil and Gas Applications; Concentrating Solar Power Plants; Steam Turbines; Wind Energy, 173-180, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-69819
https://doi.org/10.1115/GT2012-69819
View Paper titled, Measured Performance of Two-Stage Centrifugal Compressor Under Wet Gas Conditions
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Topics: Compressors, Flow (Dynamics), Ocean engineering, Pressure, Suction, Water, Air flow, Compression, Design, Engines
Proceedings Papers

Numerical Simulation and Full Scale Landing Test of a 12.5MW Vertical Motorcompressor Levitated by Active Magnetic Bearings

Andrea Masala, Giuseppe Vannini, David Ransom, Jeff Moore, Luc Baudelocque
Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 607-613, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-46411
https://doi.org/10.1115/GT2011-46411
View Paper titled, Numerical Simulation and Full Scale Landing Test of a 12.5MW Vertical Motorcompressor Levitated by Active Magnetic Bearings
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Topics: Computer simulation, Magnetic bearings, Bearings, Rotors, Dynamics (Mechanics), Compressors, Engineering prototypes, Machinery, Stators, Stress
Proceedings Papers

Engine Distress Detection in Gas Turbines With Electrostatic Sensors

Melissa Wilcox, David Ransom, Meron Henry, John Platt
Proc. ASME. GT2010, Volume 3: Controls, Diagnostics and Instrumentation; Cycle Innovations; Marine, 39-51, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22349
https://doi.org/10.1115/GT2010-22349
View Paper titled, Engine Distress Detection in Gas Turbines With Electrostatic Sensors
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Topics: Engines, Gas turbines, Sensors, Exhaust systems, Damage, Failure, Combustion, Combustion chambers, Compressors, Ducts
Proceedings Papers

Flash Atomization: A New Concept to Control Combustion Instability in Water Injected Gas Turbines

Vishwas Iyengar, Harold Simmons, David Ransom, Thomas Holzschuh
Proc. ASME. GT2010, Volume 2: Combustion, Fuels and Emissions, Parts A and B, 313-322, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22375
https://doi.org/10.1115/GT2010-22375
View Paper titled, Flash Atomization: A New Concept to Control Combustion Instability in Water Injected Gas Turbines
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Topics: Combustion, Gas turbines, Water, Bubbles, Combustion chambers, Drops, Emissions, Nitrogen oxides, Nozzles, Underground injection
Proceedings Papers

Filter Failure During High Humidity Conditions

Melissa Wilcox, David Ransom, Hector Delgado-Garibay
Proc. ASME. GT2010, Volume 5: Industrial and Cogeneration; Microturbines and Small Turbomachinery; Oil and Gas Applications; Wind Turbine Technology, 185-193, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-23641
https://doi.org/10.1115/GT2010-23641
View Paper titled, Filter Failure During High Humidity Conditions
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Topics: Failure, Filters, Water, Gas turbines, Condensation, Design, Pressure, Turbines, Air flow, Corrosion
Proceedings Papers

Leveraging the Strengths of Commercial Finite Element Modeling Codes and Custom Engineered Software to Solve Atypical Rotordynamic Problems

David Ransom
Proc. ASME. GT2008, Volume 5: Structures and Dynamics, Parts A and B, 975-982, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50363
https://doi.org/10.1115/GT2008-50363
View Paper titled, Leveraging the Strengths of Commercial Finite Element Modeling Codes and Custom Engineered Software to Solve Atypical Rotordynamic Problems
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Topics: Computer software, Finite element analysis, Modeling, Simulation, Engineers, Rotordynamics, Nonlinear systems, Rotors, Transients (Dynamics)
Proceedings Papers

Enthalpy Determination Methods for Compressor Performance Calculations

David Ransom, Klaus Brun, Rainer Kurz
Proc. ASME. GT2007, Volume 4: Turbo Expo 2007, Parts A and B, 1407-1413, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27038
https://doi.org/10.1115/GT2007-27038
View Paper titled, Enthalpy Determination Methods for Compressor Performance Calculations
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Topics: Compressors, Enthalpy, Temperature, Equations of state, Flow (Dynamics), Pressure, Simulation
Journal Articles

Comparison of Predictions With Test Results for Rotordynamic Coefficients of a Four-Pocket Gas Damper Seal

Jiming Li, David Ransom, Luis San Andre´s, John Vance
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 1999, 121(2): 363–369.
https://doi.org/10.1115/1.2833948
Published Online: April 1, 1999
View Article titled, Comparison of Predictions With Test Results for Rotordynamic Coefficients of a Four-Pocket Gas Damper Seal
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Topics: Dampers, Damping, Flow (Dynamics), Stiffness, Excitation, Leakage, Pressure, Rotors, Turbomachinery, Turbulence
Journal Articles

Experimental Force Coefficients for a Two-Bladed Labyrinth Seal and a Four-Pocket Damper Seal

David Ransom, Jiming Li, Luis San Andre´s, John Vance
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 1999, 121(2): 370–376.
https://doi.org/10.1115/1.2833949
Published Online: April 1, 1999
View Article titled, Experimental Force Coefficients for a Two-Bladed Labyrinth Seal and a Four-Pocket Damper Seal
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Topics: Dampers, Damping, Stiffness, Stress, Blades, Clearances (Engineering), Displacement, Filters, Leakage, Pressure