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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

Paper No: GT2019-91371

DOI: https://doi.org/10.1115/GT2019-91371

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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

Paper No: GT2017-64541

DOI: https://doi.org/10.1115/GT2017-64541

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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

Paper No: GT2015-43491

DOI: https://doi.org/10.1115/GT2015-43491

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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

Paper No: GT2015-42770

DOI: https://doi.org/10.1115/GT2015-42770

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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

J. Eng. Gas Turbines Power. April 2014, 136(4): 042504.

Paper No: GTP-13-1313

DOI: https://doi.org/10.1115/1.4025890

Published Online: December 12, 2013

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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

Paper No: GT2013-94594

DOI: https://doi.org/10.1115/GT2013-94594

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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

Paper No: GT2012-69819

DOI: https://doi.org/10.1115/GT2012-69819

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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

Paper No: GT2011-46411

DOI: https://doi.org/10.1115/GT2011-46411

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Topics: Computer simulation, Magnetic bearings, Bearings, Rotors, Dynamics (Mechanics), Compressors, Engineering prototypes, Machinery, Stators, Stress

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

Paper No: GT2010-23641

DOI: https://doi.org/10.1115/GT2010-23641

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Topics: Failure, Filters, Water, Gas turbines, Condensation, Design, Pressure, Turbines, Air flow, Corrosion

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

Paper No: GT2010-22375

DOI: https://doi.org/10.1115/GT2010-22375

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Topics: Combustion, Gas turbines, Water, Bubbles, Combustion chambers, Drops, Emissions, Nitrogen oxides, Nozzles, Underground injection

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

Paper No: GT2010-22349

DOI: https://doi.org/10.1115/GT2010-22349

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Topics: Engines, Gas turbines, Sensors, Exhaust systems, Damage, Failure, Combustion, Combustion chambers, Compressors, Ducts

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

Paper No: GT2008-50363

DOI: https://doi.org/10.1115/GT2008-50363

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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

Paper No: GT2007-27038

DOI: https://doi.org/10.1115/GT2007-27038

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Topics: Compressors, Enthalpy, Temperature, Equations of state, Flow (Dynamics), Pressure, Simulation

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

J. Tribol. April 1999, 121(2): 370–376.

DOI: https://doi.org/10.1115/1.2833949

Published Online: April 1, 1999

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Topics: Dampers, Damping, Stiffness, Stress, Blades, Clearances (Engineering), Displacement, Filters, Leakage, Pressure

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

J. Tribol. April 1999, 121(2): 363–369.

DOI: https://doi.org/10.1115/1.2833948

Published Online: April 1, 1999

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Topics: Dampers, Damping, Flow (Dynamics), Stiffness, Excitation, Leakage, Pressure, Rotors, Turbomachinery, Turbulence

Journal citation

NARROW

A Supercritical CO 2 Combined Power and Liquefaction Cycle

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

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

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

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

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

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

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

Filter Failure During High Humidity Conditions

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

Engine Distress Detection in Gas Turbines With Electrostatic Sensors

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

Enthalpy Determination Methods for Compressor Performance Calculations

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

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

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