• BS, Mechanical Engineering, Virginia Polytechnic Institute and State University (Virginia Tech), 1999
• MS, Mechanical Engineering, Virginia Polytechnic Institute and State University (Virginia Tech), 2001
• PhD, Mechanical Engineering, Virginia Polytechnic Institute and State University (Virginia Tech), 2006

Journal Articles

Nick Gailey, Michael D Barringer, Reid Berdanier and Karen A Thole, 2025, "Integration of Cooling Holes into a Turbine Vane Made Using Additive Manufacturing", Journal of Turbomachinery, 147, (6), pp. 11

Reid Berdanier, Margaret Nunn, Justin Brumberg, Michael D Barringer, Scott Fishbone and Karen A Thole, 2025, "Evaluating Thin-Film Thermocouple Performance on Additively Manufactured Turbine Airfoils", Journal of Turbomachinery, 147, (7), pp. 12

Maria Rozman, Reid Berdanier, Michael Barringer and Karen Thole, 2024, "Strategies for High-Accuracy Measurements of Stage Efficiency for a Cooled Turbine", Journal of Turbomachinery, 146, (10), pp. 12

Kelsey McCormack, Nicholas Gailey, Reid Berdanier, Michael D Barringer and Karen A Thole, 2024, "Quantifying Part-to-Part Flow Variations and Cooling Effectiveness in Engine-Run Blades", Journal of Turbomachinery, 146, (1), pp. 9

Chad Schaeffer, Michael D Barringer, Stephen Lynch and Karen A Thole, 2024, "Influence of Dilution and Effusion Flows in Generating Variable Inlet Profiles for a High-Pressure Turbine", Journal of Turbomachinery, 147, (3), pp. 14

Ivan Monge-Concepcion, Michael D Barringer, Reid Berdanier, Karen A Thole and Chris Robak, 2023, "Use of Multiple Tracer Gases to Quantify Vane Trailing Edge Flow Into Turbine Rim Seals", Journal of Turbomachinery, 145, (1), pp. 11

Ivan Monge-Concepcion, Shawn Siroka, Reid Berdanier, Michael D Barringer, Karen Thole and Christopher Robak, 2022, "Influence of Vane Trailing Edge Flow on the Formation of Cavity Cells and Rim Sealing", Journal of Turbomachinery, 144, (6), pp. 11

Ivan Monge-Concepcion, Reid Berdanier, Michael D Barringer, Karen A Thole and Chris Robak, 2020, "Evaluating the Effect of Vane Trailing Edge Flow on Turbine Rim Sealing", Journal of Turbomachinery, 142, (8), pp. 12

Reid Berdanier, Ivan Monge-Concepcion, Brian F. Knisely, Michael D Barringer, Kare A Thole and Eric A. Grover, 2019, "Scaling Sealing Effectiveness in a Stator-Rotor Cavity for Differing Blade Spans", Journal of Turbomachinery, 141, (5), pp. 10

Kenneth Clark, Michael D Barringer, David Johnson, Karen A Thole, Eric Grover and Chris Robak, 2018, "Effects of Purge Flow Configuration on Sealing Effectiveness in a Rotor-Stator Cavity", Journal of Engineering for Gas Turbines and Power, 140, (11), pp. 11

Kenneth Clark, Michael D Barringer, Karen A Thole, Carey Clum, Paul Hiester, Curtis Memory and Christopher Robak, 2017, "Effects of Purge Jet Momentum on Sealing Effectiveness", Journal of Engineering for Gas Turbines and Power, 139, (3), pp. 10

Michael D Barringer, Karen A Thole, Vaidyanathan Krishnan and Evan Landrum, 2014, "Manufacturing Influences on Pressure Losses of Channel Fed Holes", Journal of Turbomachinery, 136, (5), pp. 10

Michael D Barringer, Karen A Thole, Duane L. Breneman, K. -M. Tham and V. Laurello, 2013, "Effects of Centrifugal Forces on Particle Deposition for a Representative Seal Pin Between Two Blades", Journal of Engineering for Gas Turbines and Power, 135, (3), pp. 10

S. A. Weaver, Michael D Barringer and Karen A Thole, 2011, "Microchannels With Manufacturing Roughness Levels", Journal of Turbomachinery, 133, (4), pp. 8

Michael D Barringer, Karen A Thole and M. D. Polanka, 2009, "An Experimental Study of Combustor Exit Profile Shapes on Endwall Heat Transfer in High Pressure Turbine Vanes", Journal of Turbomachinery, 131, (2), pp. 10

Michael D Barringer, Karen A Thole and M. D. Polanka, 2009, "Effects of Combustor Exit Profiles on Vane Aerodynamic Loading and Heat Transfer in a High Pressure Turbine", Journal of Turbomachinery, 131, (2), pp. 10

Michael D Barringer, Karen A Thole, M. D. Polanka, J. P. Clark and P. J. Koch, 2009, "Migration of Combustor Exit Profiles Through High Pressure Turbine Vanes", Journal of Turbomachinery, 131, (2), pp. 10

N. Sundaram, Michael D Barringer and Karen A Thole, 2008, "Effects of Deposits on Film Cooling of a Vane Endwall Along the Pressure Side", Journal of Turbomachinery, 130, (4), pp. 8

Michael D Barringer, Karen A Thole and M. D. Polanka, 2007, "Experimental Evaluation of an Inlet Profile Generator for High-Pressure Turbine Tests", Journal of Turbomachinery, 129, (2), pp. 12

Michael D Barringer, Owen T Richard, Joseph P Walter, Sarah M Stitzel and Karen A Thole, 2002, "Flow Field Simulations of a Gas Turbine Combustor", Journal of Turbomachinery, 124, (3), pp. 9

Conference Proceedings

Maria Rozman, Margaret Nunn, Michael D Barringer, Karen A Thole and Reid Berdanier, 2025, "A Comparison of Secondary Kinetic Energy Definitions Using Time-Resolved Flow Field Measurements in a Turbine", American Institute of Aeronautics and Astronautics, pp. 20

Chad Schaeffer, Michael D Barringer, Stephen Lynch and Karen A Thole, 2024, "Influence of Dilution and Effusion Flows in Generating Variable Inlet Profiles for a High-Pressure Turbine", American Society of Mechanical Engineers, pp. 15

Nicholas Gailey, Michael D Barringer, Reid Berdanier and Karen A Thole, 2024, "Integration of Cooling Holes into a Turbine Vane Made Using Additive Manufacturing", American Society of Mechanical Engineers, pp. 13

Reid Berdanier, Margaret Nunn, Justin Brumberg, Michael D Barringer, Scott Fishbone and Karen A Thole, 2024, "Evaluating Thin-Film Thermocouple Performance on Additively Manufactured Turbine Airfoils", American Society of Mechanical Engineers, pp. 15

Maria Rozman, Reid Berdanier, Michael Barringer and Karen Thole, 2023, "Strategies for High-Accuracy Measurements of Stage Efficiency for a Cooled Turbine", American Society of Mechanical Engineers, pp. 12

Kelsey E. McCormack, Nicholas L Gailey, Reid Berdanier, Michael D Barringer and Karen A Thole, 2023, "Quantifying Part-to-Part Flow Variations and Cooling Effectiveness in Engine-Run Blades", American Society of Mechanical Engineers, pp. 10

Ivan Monge-Concepcion, Michael D Barringer, Berdanier, Karen Thole and Christopher Robak, 2022, "Use of Multiple Tracer Gases to Quantify Vane Trailing Edge Flow into Turbine Rim Seals", American Society of Mechanical Engineers, pp. 14

Karen Thole, Michael D Barringer, Reid Berdanier, Scott Fishbone and Joel Wagner, 2021, "Defining a Testbed for the U.S. Turbine Industry: The National Experimental Turbine (NExT)", American Institute of Aeronautics and Astronautics, pp. 14

Ivan Monge-Concepcion, Shawn Siroka, Reid Berdanier, Michael D Barringer, Karen A Thole and Chris Robak, 2021, "Unsteady Turbine Rim Sealing and Vane Trailing Edge Flow Effects", American Society of Mechanical Engineers, pp. 13

Shawn Siroka, Ivan Monge-Concepcion, Reid Berdanier, Michael D Barringer, Karen A Thole and Chris Robak, 2021, "Correlating Cavity Sealing Effectiveness to Time-Resolved Rim Seal Events in the Presence of Vane Trailing Edge Flow", American Society of Mechanical Engineers, pp. 14

Ivan Monge-Concepcion, Reid Berdanier, Michael D Barringer and Karen A Thole, 2019, "Evaluating the Effect of Vane Trailing Edge Flow on Turbine Rim Sealing", Proceedings of ASME Turbo Expo 2019 – Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 14

Reid Berdanier, Ivan Monge-Concepcion, Brian Knisely, Michael D Barringer and Karen A Thole, 2018, "Scaling Sealing Effectiveness in a Stator-Rotor Cavity for Differing Blade Spans", Proceedings of ASME Turbo Expo 2018 – Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 12

Kenneth Clark, Michael D Barringer, David Johnson, Karen A Thole, Eric Grover and Chris Robak, 2017, "Effects of Purge Flow Configuration on Sealing Effectiveness in a Rotor-Stator Cavity", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 14

Kenneth Clark, Michael D Barringer, Karen A Thole, Carey Clum, Paul Hiester, Curtis Memory and Christopher Robak, 2016, "Effects of Purge Jet Momentum on Sealing Effectiveness", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 12

Kenneth Clark, Michael D Barringer, Karen A Thole, Carey Clum, Paul Hiester, Curtis Memory and Christopher Robak, 2016, "Using a Tracer Gas to Quantify Sealing Effectiveness for Engine Realistic Rim Seals", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 12

Michael D Barringer, Andrew Coward, Ken Clark, Karen A Thole, John Schmitz, Joel Wagner, Mary Anne Alvin, Patcharin Burke and Rich Dennis, 2014, "The Design of a Steady Aero Thermal Research Turbine (START) for Studying Secondary Flow Leakages and Airfoil Heat Transfer", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 13

Michael D Barringer, Karen A Thole, Vaidyanathan Krishnan and Evan Landrum, 2013, "Manufacturing Influences on Pressure Losses of Channel Fed Holes", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 12

Michael D Barringer, Karen A Thole, Duane L. Breneman, K-M Tham and V. Laurello, 2012, "Effects of Centrifugal Forces on Particle Deposition for a Representative Seal Pin Between Two Blades", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 11

S. A. Weaver, Michael D Barringer and Karen A Thole, 2010, "Microchannels With Manufacturing Roughness Levels", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Soceity of Mechanical Engineers

Grant O. Musgrove, Eric Grover, Michael D Barringer, Joseph Barker and Karen A Thole, 2009, "Computational Design of a Louver Particle Separator for Gas Turbine Engines", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

Michael D Barringer, Karen A Thole and M. D. Polanka, 2007, "An Experimental Study of Combustor Exit Profile Shapes on Endwall Heat Transfer in High Pressure Turbine Vanes", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

N. Sundaram, Michael D Barringer and Karen A Thole, 2007, "Effects of Deposits on Film Cooling of a Vane Endwall Along the Pressure Side", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

Michael D Barringer, Karen A Thole, M. D. Polanka, J. P. Clark and P. J. Koch, 2007, "Migration of Combustor Exit Profiles Through High Pressure Turbine Vanes", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

Michael D Barringer, Karen A Thole and M. D. Polanka, 2006, "Effects of Combustor Exit Profiles on High Pressure Turbine Vane Aerodynamics and Heat Transfer", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

Michael D Barringer, Karen A Thole and M. D. Polanka, 2006, "Experimental Evaluation of an Inlet Profile Generator for High Pressure Turbine Tests", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

V. R. Kunze, M. Wolff, Michael D Barringer, Karen A Thole and M. D. Polanka, 2006, "Numerical Insight into Flow and Thermal Patterns Within an Inlet Profile Generator Comparing to Experimental Results", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

V. R. Kunze, M. Wolff, Michael D Barringer, Karen A Thole and M. D. Polanka, 2005, "Numerical Modeling of Flow and Thermal Patterns Within a Combustor Simulator", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

Michael D Barringer, Karen A Thole and M. D. Polanka, 2004, "Developing a Combustor Simulator for Investigating High Pressure Turbine Aerodynamics and Heat Transfer", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers

Michael D Barringer, Owen T Richard, Joseph P Walter, Sarah M Stitzel and Karen A Thole, 2001, "Flow Field Simulations of a Gas Turbine Combustor", Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, pp. 10

Nick Gailey, Emily Hartman, Michael D Barringer, Reid Berdanier, Karen A Thole, Allan Arisi and Atul Kohli, , "Thermal Performance Comparisons of Advanced Cooling Designs Under Engine Representative Conditions", American Society of Mechanical Engineers

• November 2023 - April 2025, "Expanding Capabilities in the Steady Thermal Aero Research Turbine (START) for Heat Transfer and Aerodynamic Research," (Sponsor: U.S. Department of Energy).

• July 2021 - June 2025, "Leading Advanced Turbine Research for Hybrid Electric Propulsion Systems," (Sponsor: National Aeronautics and Space Administration).

• October 2015 - December 2023, "Improving Turbine Efficiencies through Heat Transfer and Aerodynamic Research in the Steady Thermal Aero Research Turbine (START)," (Sponsor: U.S. Department of Energy).

• Hot Section Engineering Recognition for the PW1100G PSU START Rig Team, Pratt & Whitney (RTX Corporation), 2024

• Fellow, American Society of Mechanical Engineers (ASME), 2022

• Hot Section Engineering Recognition for START Laboratory Phase 1 Completion, Pratt & Whitney (RTX Corporation), 2016

• Hot Section Engineering Recognition for the Design and Development of the START Laboratory, Pratt & Whitney (RTX Corporation), 2015

• Incentive Award, Turbines Branch, Propulsion Directorate, US Air Force Reseach Laboratory, Wright-Patterson Air Force Base, 2004

• Best Technical Presentation, AIAA 28th Dayton-Cincinnati Aerospace Science Symposium, 2003

• Davenport Fellowship, Mechanical Engineering at Virginia Tech, 2002

• Pratt Fellowship, Mechanical Engineering at Virginia Tech, 1999

Service to Penn State:

• Committee Work, Committee Member, Graduate Faculty, 2024

• Committee Work, Committee Member, Career Advancement Committee, 2024

• Committee Work, Committee Member, Professional Track Promotion Committee (Non-Tenure Line), 2020 - 2023

Service to External Organizations:

• Organizing Conferences and Service on Conference Committees, Co-Chairperson, Co-Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2010

• Organizing Conferences and Service on Conference Committees, Co-Chairperson, Co-Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2011

• Organizing Conferences and Service on Conference Committees, Co-Chairperson, Co-Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2012

• Organizing Conferences and Service on Conference Committees, Co-Chairperson, Co-Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2013

• Organizing Conferences and Service on Conference Committees, Co-Chairperson, Co-Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2014

• Organizing Conferences and Service on Conference Committees, Chairperson, Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2015

• Organizing Conferences and Service on Conference Committees, Co-Chairperson, Co-Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2017

• Organizing Conferences and Service on Conference Committees, Chairperson, Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2018

• Organizing Conferences and Service on Conference Committees, Chairperson, Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2019

• Organizing Conferences and Service on Conference Committees, Co-Chairperson, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2020

• Organizing Conferences and Service on Conference Committees, Chairperson, Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2022

• Organizing Conferences and Service on Conference Committees, Chairperson, Co-Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Sessions, 2023

• Organizing Conferences and Service on Conference Committees, Chairperson, Vanguard Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Committee, 2024

• Organizing Conferences and Service on Conference Committees, Chairperson, Vanguard Chair, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Committee, 2025

• Organizing Conferences and Service on Conference Committees, Co-Chairperson, Proceedings of the ASME Turbo Expo - Turbomachinery Technical Conference and Exposition, Heat Transfer Session, 2025