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James F. Walton II Publications

Home Company Our Team James F. Walton II, VP of Program Development James F. Walton II Publications

Walton, J.F., at.al. "The Effects of Internal Rotor Friction on Dynamic Characteristics of Turbopumps," Proceedings Advanced Earth-to-Orbit Propulsion Technology, NASA-CP-2437 Vol. II, pp 33-61, May 13-15, 1986.

May 13, 1986

Squeeze Film Damper Technology Parts II, III and IV- Final Report

September 1, 1986

Experimental Observation of Cavitating Squeeze Film Dampers

April 1, 1987

Experimental Investigation of Internal Friction Instability

May 10, 1988

High Speed Balancing Applied to the T700 Engine

January 1, 1990

Internal Rotor Friction Instability

January 1, 1990

Internal Friction Instability in the SSME Turbopump

May 15, 1990

Advanced Multi-Squeeze Film Dampers for Rotor Vibration Control

October 8, 1990

Advanced Rotordynamics Program: High Load Dampers - Final Report

July 31, 1991

Advanced Balancing Using Laser Machining

September 23, 1991

High Temperature Powder Lubricated Dampers for Gas Turbine Engines

March 1, 1992

Rotordynamic Evaluation of an Advanced Multi-Squeeze Film Damper - Imbalance Response and Bladeloss Simulation

April 1, 1993

A Chambered Porous Damper for Rotor Vibration Control: Part II - Imbalance Response and Bladeloss Simulation

April 1, 1993

A Chambered Porous Damper for Rotor Vibration Control: Part I - Concept Development

April 1, 1993

The Basics of Powder Lubrication in High-Temperature Powder Lubricated Dampers

April 1, 1993

An Investigation of Angular Stiffness and Damping Coefficients of an Axial Spline Coupling in High-Speed Rotating Machinery

May 10, 1993

A Theoretical Approach to Determine Angular Stiffness and Damping Coefficients of an Axial Spline Coupling in High-Speed Rotating Machinery

September 19, 1993

An Experimental Investigation of the Dynamic Characteristics of an Axial Spline Coupling in High-Speed Rotating Machinery

September 19, 1993

Internal Rotor Friction Induced Instability in High-Speed Rotating Machinery

September 19, 1993

Dynamic Coefficients of Axial Spline Couplings in High Speed Rotating Machinery

July 1, 1994

Compliant Foil Bearings For Use In Cryogenic Turbopumps

September 19, 1994

Velocity-Controlled Magnetic Bearings with Solid Cores

December 13, 1995

Novel Magnetic Bearings for Flywheel Energy Storage System

February 25, 1996

Zero Clearance Auxiliary Bearings for Magnetic Bearing Systems

June 2, 1997

Test of a Zero Clearance Auxiliary Bearing

August 21, 1997

A High Efficiency Magnetic Bearing for a Rotary Blood Pump

April 23, 1998

On the Performance of Hybrid Foil-Magnetic Bearings

June 2, 1998

Auxiliary Bearings in Support of Magnetic Bearings for Turbine Engines

April 6, 1999

Application of Foil Bearings to Turbomachinery Including Vertical Operation

June 1, 1999

The Application of Foil Seals to a Gas Turbine Engine

June 20, 1999

On the Application of Powder Shear Damping to a Structural Element

May 8, 2000

A Gas Turbine Engine Backup Bearing Operating Beyond 2.5 Million DN

May 8, 2000

Oil Free Turbocharger Demonstration Paves Way to Gas Turbine Engine Applications

May 8, 2000

Principles of Bearing Design

January 1, 2001

On the Frictional Damping Characterization of Compliant Bump Foils

January 1, 2002

Performance Of A Foil-Magnetic Hybrid Bearing

April 1, 2002

Testing of a Centrifugal Blood Pump with a High Efficiency Hybrid Magnetic Bearing

June 1, 2002

A Test Stand for Dynamic Characterization of Oil-Free Bearings for Modern Gas Turbine Engines

June 1, 2002

The Role of High Performance Foil Bearings in Advanced, Oil-free, High-speed Motor Driven Compressors

April 21, 2003

A 700,000 rpm Feasibility Demonstration for Mesoscopic Scale Gas Turbine Engines

December 3, 2003

Testing of a Small Turbocharger/Turbojet Sized Simulator Rotor Supported on Foil Bearings

June 1, 2004

Operation of a Mesoscopic Gas Turbine Simulator at Speeds in Excess of 700,000 rpm on Foil Bearings

June 1, 2004

Advancements In The Structural Stiffness and Damping Of A Large Compliant Foil Journal Bearing: An Experimental Study

June 1, 2004

In Vivo Performance of a Magnetically Suspended Rotary Blood Pump Prototype

June 17, 2004

Status of Magnetically Suspended MiTiHeart LVAD

June 1, 2005

Turbojet Engine Demonstration with a High Temperature Air Foil Bearing

September 12, 2005

High-Temperature High-Speed Tribometer with Complex Motion

September 12, 2005

Low-friction Wear Resistant Coatings for High-Temperature Foil Bearings

September 12, 2005

Magnetically Suspended Rotary Blood Pump

September 12, 2005

A Turbojet Engine Demonstration with Air Foil Bearing

December 3, 2005

Design of a Small Centrifugal Blood Pump with Hybrid Magnetic Bearings

January 1, 2006

Prediction of Hydrodynamic Bearing Performance for Cardiac Assist Devices

January 1, 2006

Heshmat, Hooshang and Walton II, James F. "Principles of Gas Turbine Bearing Lubrication and Design." Handbook of Lubrication and Tribology: Volume I Application and Maintenance. Vol. 1. CRC Press, 2006.

January 1, 2006

Small Gas Turbine Engine Operating With High-Temperature Foil Bearings

May 1, 2006

On The Development Of An Oil-Free Electric Turbocharger For Fuel Cells

May 1, 2006

In Vitro Characterization of the Redesigned MiTiHeart LVAD

June 3, 2007

Design and Performance Evaluation of a Hybrid Magnetic Bearing for a Rotary Blood Pump

October 22, 2007

Performance Characterization of MiTiHeart Rotary Centrifugal LVAD with Magnetic Suspension

June 3, 2008

Characterization of the New MiTiHeart LVAD Prototype

June 3, 2008

An Advanced High-Efficiency Power Generation and Thermal Management System

May 4, 2009

Demonstration of a Turbojet Engine Using an Air Foil Bearing

June 6, 2009

Oil-Free Renewable Energy Turbine Generator Systems

May 3, 2010

Test and Simulation of a Mock Circulatory System with Starling Response for Evaluation of Ventricular Assist Devices

January 1, 2011

Squeeze Film Damper Technology: Part I - Prediction of Finite Length Damper Performance

March 31, 2014

Power Turbine Dynamics - An Evaluation of a Shear Mounted Elastomeric Damper

March 31, 2014

Debris Tolerant Compliant Foil Bearings for High-Speed Turbomachines

June 15, 2015

High Effectiveness, Low Pressure Drop Recuperator for High Speed and Power Oil-Free Turbogenerator

June 15, 2015

Starved Hydrodynamic Gas Foil Bearings - Experiment, Micromechanical Phenomenon and Hypotheses

March 1, 2016

Design of a Partial Admission Turbine for an Organic Rankine Cycle with Environmental Fluctuation Consideration

March 10, 2016

Lubricant Free Foil Bearings Pave Way to Highly Efficient and Reliable Flywheel Energy Storage System

March 10, 2016

A Bladeless Turbocompressor Concept: Shear Driven Gas Compression with Deformable Structures—Part I Experimental Proof of Concept

June 24, 2017

Technology Readiness of 5th and 6th Generation Compliant Foil Bearing for 10 MWE s-CO2 Turbomachinery Systems

March 15, 2018

Ultra-High Temperature Compliant Foil Bearings - The Journey to 870°C and Application in Gas Turbine Engines: Experiment

June 11, 2018

On the Integration of Hot Foil Bearings into Gas Turbine Engines: Theoretical Treatment

June 17, 2019