Photo of Stephen Lynch

Stephen Lynch

Professor
Director, Center for Gas Turbine Research, Education, and Outreach

Affiliation(s):

  • Mechanical Engineering

149 Lidia Mason Building

spl11@psu.edu

814-867-4768

Personal or Departmental Website

Research Areas:

Energy Systems; Thermal/Fluid Sciences

Interest Areas:

Convective heat transfer and turbulent boundary layers, gas turbine heat transfer and aerodynamics, advanced experimental diagnostics

 
 

 

Education

  • BS, Mechanical Engineering, University of Wyoming, 2003
  • MS, Mechanical Engineering, Virginia Polytechnic Institute & State University, 2007
  • Ph D, Mechanical Engineering, Virginia Polytechnic Institute & State University, 2011

Publications

Journal Articles

  • Jason Young, Stephan Brinckmann, Andrew Fox, Stephen Lynch, Ray Fertig and Carl Frick, 2024, "On enhancing the manufacturability and conversion of additively manufactured polymer-derived ceramics", Additive Manufacturing, 44, (14)
  • M. Eric Lyall, Ryan Battelle, Evan Lundburg and Stephen Lynch, 2024, "Aircraft gas turbine cycle impacts of forward-mounted heat exchangers", Journal of DoD Research & Engineering, 7, (2)
  • Peter Wilkins, Stephen Lynch and Karen A Thole, 2024, "The impact of multi-scale ceramic matrix composite roughness on heat transfer and boundary layer behavior", Journal of Turbomachinery
  • Andrew Fox, Stephen Lynch, Jason Young, Carl Frick, Jennifer Hankins, Kyle Kuhn, Stephan Brinckmann and Ray Fertig III, 2024, "Design and cooling performance of additively manufactured ceramic turbine vanes", Journal of Turbomachinery, 146, (5)
  • Peter Wilkins, Stephen Lynch, Karen A Thole, Tyler Vincent, San Quach and Eleanor Kaufman, 2022, "Experimental investigation into the effect of a ceramic matrix composite surface on film cooling", Journal of Turbomachinery, 144, (12)
  • Peter Wilkins, Stephen Lynch, Karen A Thole, San Quach, Tyler Vincent and Dominic Mongillo, 2022, "Effect of a ceramic matrix composite surface on film cooling", Journal of Turbomachinery, 144, (8)
  • David Saltzman and Stephen Lynch, 2022, "Overall pressure loss and heat transfer performance of additively manufactured offset strip fins used in compact heat exchangers", Journal of Thermal Science and Engineering Applications, 14, (12)
  • Haosen Xu, Stephen Lynch and Xiang Yang, 2022, "Direct numerical simulation of slot film cooling downstream of misaligned plates", Flow, 2
  • Swapnil Sinha, Stephen Lynch and Nicholas A. Meisel, 2021, "Heat transfer simulation of material extrusion additive manufacturing to predict weld strength between layers", Additive Manufacturing, 46
  • Zach Robison, John-Paul Mosele, Andreas Gross and Stephen Lynch, 2021, "Numerical investigation of turbulent junction flow", AIAA Journal, 59, (11)
  • Shane Haydt and Stephen Lynch, 2021, "Heat transfer coefficient augmentation for a shaped film cooling hole at a range of compound angles", Journal of Turbomachinery, 143, (5)
  • Bashir Mekki, Joshua Langer and Stephen Lynch, 2021, "Genetic algorithm based topology optimization of heat exchanger fins used in aerospace applications", International Journal of Heat and Mass Transfer, 170
  • Peter Wilkins, Stephen Lynch, Karen A Thole, San Quach and Tyler Vincent, 2021, "Experimental heat transfer and boundary layer measurements on a ceramic matrix composite surface", Journal of Turbomachinery, 143, (6)
  • David Saltzman and Stephen Lynch, 2021, "Flow field measurements in a metal additively manufactured offset strip fin using laser Doppler velocimetry", Journal of Fluids Engineering, 143, (4)
  • Jeremy Zuccarello, Eric Lange and Stephen Lynch, 2020, "Effect of longitudinal vortices on turbulent junction flow heat transfer", Journal of Thermophysics and Heat Transfer, 34, (4)
  • Michael Bichnevicius, David Saltzman and Stephen Lynch, 2019, "Comparison of additively manufactured louvered plate-fin heat exchangers", Journal of Thermal Science and Engineering Applications, 12, (1)
  • Syed Elahi, Eric Lange and Stephen Lynch, 2019, "Experimental measurements of turbulent junction flow using high speed stereo PIV and IR thermography", International Journal of Heat and Mass Transfer, 142
  • Shane Haydt and Stephen Lynch, 2019, "Cooling effectiveness for a shaped film cooling hole at a range of compound angles", Journal of Turbomachinery, 141, (4)
  • Kirsten Muirhead and Stephen Lynch, 2018, "A computational study of combustor dilution flow interaction with turbine vanes", Journal of Propulsion and Power, 35, (1)
  • David Saltzman, Michael Bichnevicius, Stephen Lynch, Timothy W Simpson, Edward Reutzel, Corey Dickman and Richard Martukanitz, 2018, "Experimental comparison of a traditionally built versus additively manufactured aircraft heat exchanger", Applied Thermal Engineering, 138, pp. 254-263
  • Shane Haydt, Stephen Lynch and Scott Lewis, 2018, "The effect of area ratio change via increased hole length for shaped film cooling holes with constant expansion angles", Journal of Turbomachinery, 140, (5)
  • Shane Haydt, Stephen Lynch and Scott Lewis, 2017, "The effect of meter-diffuser offset in shaped film cooling holes", Journal of Turbomachinery, 139, (9)
  • Stephen Lynch and Karen A Thole, 2017, "Heat transfer and film cooling on a contoured blade endwall with platform gap leakage", Journal of Turbomachinery, 139, (5)
  • Stephen Lynch, 2017, "Three-dimensional boundary layer in a turbine blade passage", Journal of Propulsion and Power, 33, (4)
  • Michael Leonetti, Stephen Lynch, Jacqueline O'Connor and Sean Bradshaw, 2017, "Combustor dilution hole placement and its effect on the turbine inlet flowfield", Journal of Propulsion and Power, 33, (3)
  • Stephen Lynch and Karen A Thole, 2016, "Comparison of the three-dimensional boundary layer on flat versus contoured turbine endwalls", Journal of Turbomachinery, 138, (4), pp. 041008-1-10
  • Corey Anderson and Stephen Lynch, 2016, "Time resolved stereo-PIV measurements of the horseshoe vortex system at multiple locations in a low aspect ratio pin-fin array", Experiments in Fluids, 57, (5), pp. 1-18
  • Seth Lawson, Stephen Lynch and Karen A Thole, 2013, "Simulations of multi-phase particle deposition on a non-axisymmetric contoured endwall with film cooling", Journal of Turbomachinery, 135, (3)
  • Stephen Lynch, Karen A Thole, Atul Kohli and Christopher Lehane, 2011, "Computational predictions of heat transfer and film cooling for a turbine blade with non-axisymmetric endwall contouring", Journal of Turbomachinery, 133, (4)
  • Stephen Lynch, Sundar Narayan, Karen A Thole, Atul Kohli and Christopher Lehane, 2011, "Heat transfer for a turbine blade with non-axisymmetric endwall contouring", Journal of Turbomachinery, 133, (1)
  • Stephen Lynch and Karen A Thole, 2011, "The effect of the combustor-turbine slot and mid-passage gap on vane endwall heat transfer", Journal of Turbomachinery, 133, (4), pp. 041002-1-9
  • Stephen Lynch and Karen A Thole, 2008, "The effect of combustor-turbine interface gap leakage on the endwall heat transfer for a nozzle guide vane", Journal of Turbomachinery, 130, (4)
  • Chad Schaeffer, Michael D Barringer, Stephen Lynch and Karen A Thole, , "Influence of dilution and effusion flows in generating variable inlet profiles for a high-pressure turbine", Journal of Turbomachinery
  • Ashrit Tayade and Stephen Lynch, , "Effect of ceramic matrix composites on the thermal efficiency of a power generation turbine", Journal of Turbomachinery
  • Kyle McFerran, Stephen Lynch and Karen A Thole, , "The negative effects of dirt ingestion on cooling within double-walled combustor liners", Journal of Turbomachinery
  • Evan Lundburg, Stephen Lynch and M. Eric Lyall, , "Effect of flow distortions on pin fins in the entry region of circular channels", Journal of Turbomachinery

Conference Proceedings

  • Evan Lundburg, Stephen Lynch and M. Eric Lyall, 2024, "Effect of flow distortions on pin fins in the entry region of circular channels"
  • Evan Lundburg, Stephen Lynch and M. Eric Lyall, 2024, "Entry region heat transfer augmentation with pins, fins, and turbulators in circular channels"
  • Kyle McFerran, Stephen Lynch and Karen A Thole, 2024, "The negative effects of dirt ingestion on cooling within double-walled combustor liners"
  • Matthew Krull, Stephen Lynch, Matthew Searle, Timothy Floyd, Forrest Ames and Douglas Straub, 2024, "Computational study of additively manufactured internally cooled airfoils for industrial gas turbine applications"
  • Jacob Swartz, Stephen Lynch, Matthew Krull and Isabella Gayoso, 2024, "Conjugate modelling of a fully film cooled vane at transonic conditions"
  • Ashrit Tayade and Stephen Lynch, 2024, "Effect of ceramic matrix composites on the thermal efficiency of a power generation turbine"
  • 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"
  • Evan Lundburg, Stephen Lynch and M. Eric Lyall, 2024, "Entry region heat transfer augmentation with pins, fins, and turbulators in circular channels", Journal of Turbomachinery
  • Jack Medzorian and Stephen Lynch, 2024, "Effect of freestream turbulence on adverse pressure gradient turbulent boundary layers"
  • Brandon Fallon, Kyle McFerran, Sarah Fox, Karen A Thole, Stephen Lynch, Ryan Lundgreen and Stephen Kramer, 2023, "Comparison of dirt deposition on double-walled combustor liner geometries"
  • Evan Lundburg, Stephen Lynch, Kevin Liu, Hongzhou Xu and Michael Fox, 2023, "The effect of meter-diffuser angular offset on film cooling hole adiabatic effectiveness"
  • Peter Wilkins, Stephen Lynch and Karen A Thole, 2023, "The impact of multi-scale ceramic matrix composite roughness on heat transfer and boundary layer behavior"
  • Andrew Fox, Stephen Lynch, Jason Young, Carl Frick, Jennifer Hankins, Kyle Kuhn, Stephan Brinckmann and Ray Fertig III, 2023, "Design and cooling performance of additively manufactured ceramic turbine vanes"
  • Evan Lundburg, Stephen Lynch and M. Eric Lyall, 2023, "Heat transfer augmentation with pin fins in the entry region of circular channels"
  • Jack Medzorian and Stephen Lynch, 2023, "Effect of freestream turbulence on wall-bounded tip vortex breakdown and decay mechanisms"
  • Peter Wilkins, Stephen Lynch, Karen A Thole, Tyler Vincent, San Quach and Eleanor Kaufman, 2022, "Experimental investigation into the effect of a ceramic matrix composite surface on film cooling"
  • Evan Lundburg, Stephen Lynch, Kevin Liu, Hongzhou Xu and Michael Fox, 2022, "The effect of diffuser shape for film cooling holes with constant expansion angles and area ratio"
  • Erica Winegardner, Emma Lemay, Stephen Lynch, Karen A Thole and Jacqueline O'Connor, 2022, "Energy and the university: the role of gas turbines in US universities and strategies for enhancing energy literacy"
  • Teri Baker, Michael Manahan, Stephen Lynch and Edward Reutzel, 2022, "Effect of surface roughness and hydraulic diameter on additively manufactured offset strip fin heat exchanger coupons"
  • Stephen Lynch and Matthew Boggio, 2022, "Computational analysis of rotating detonation engine exhaust interacting with a turbine vane"
  • Bashir Mekki and Stephen Lynch, 2022, "Voxel based three-dimensional topology optimization of heat exchanger fins"
  • Thao-Le Tran, Jiaxuan Wang, Margaret Byron, Stephen Lynch and Robert Kunz, 2021, "Experimental and computational studies on saltation of metal powders used in laser powder bed fusion systems for metal additive manufacturing"
  • Peter Wilkins, Stephen Lynch, Karen A Thole, San Quach, Tyler Vincent and Dominic Mongillo, 2021, "Effect of a ceramic matrix composite surface on film cooling performance"
  • Alexander Rusted and Stephen Lynch, 2021, "Determining total pressure fields from velocimetry measurements in a transonic turbine flowfield"
  • Jayant Rao and Stephen Lynch, 2021, "Large eddy simulation of flow and heat transfer over forward-facing steps with upstream injection"
  • Jeremy Zuccarello, David Saltzman, Stephen Lynch, Shane Haydt and Christopher Whitfield, 2020, "A steady transonic linear cascade for true scale cooling measurements"
  • Kevin Tracy and Stephen Lynch, 2020, "Large eddy simulation of the 777 shaped film cooling hole at axial and compound angle orientations"
  • Peter Wilkins, Stephen Lynch, Karen A Thole, San Quach and Tyler Vincent, 2020, "Experimental heat transfer and boundary layer measurements on a ceramic matrix composite surface"
  • Andrew Scott White, David Saltzman and Stephen Lynch, 2020, "Performance analysis of heat sinks designed for additive manufacturing"
  • Eric Lange and Stephen Lynch, 2020, "The effect of freestream turbulence integral length scale on junction flow behavior"
  • Bashir Mekki, Joshua Langer and Stephen Lynch, 2020, "Genetic algorithm based topology optimization of heat exchanger fins used in aerospace applications"
  • Jeremy Zuccarello, Eric Lange and Stephen Lynch, 2019, "Effect of longitudinal vortices on turbulent junction flow heat transfer"
  • Shane Haydt and Stephen Lynch, 2019, "Heat transfer coefficient augmentation for a shaped film cooling hole at a range of compound angles"
  • Stephen Lynch, 2018, "Large eddy simulations of low pressure turbine endwall flow and heat transfer"
  • Michael Bichnevicius, David Saltzman and Stephen Lynch, 2018, "Comparison of louvered plate-fin heat exchangers made via additive manufacturing"
  • Shane Haydt and Stephen Lynch, 2018, "Cooling effectiveness for a shaped film cooling hole at a range of compound angles"
  • Shane Haydt and Stephen Lynch, 2018, "Flowfield of a shaped film cooling hole over a range of compound angles"
  • Eric Lange, Syed Elahi and Stephen Lynch, 2018, "Time-resolved PIV measurements of the effect of freestream turbulence on horseshoe vortex dynamics"
  • Syed Elahi, Zachary Moul, Eric Lange and Stephen Lynch, 2018, "Unsteady heat flux measurements of junction flow with Reynolds number and freestream turbulence effects"
  • Syed Elahi, Eric Lange and Stephen Lynch, 2017, "Experimental measurements of turbulent junction flow using high speed stereo PIV and IR thermography"
  • Shane Haydt, Stephen Lynch and Scott Lewis, 2017, "The effect of area ratio change via increased hole length for shaped film cooling holes with constant expansion angles", ASME International Gas Turbine Institute Turbo Expo
  • Kirsten Muirhead and Stephen Lynch, 2017, "A computational study of combustor dilution flow interaction with turbine vanes"
  • David Saltzman, Michael Bichnevicius, Stephen Lynch, Timothy W Simpson, Edward Reutzel, Corey Dickman and Richard Martukanitz, 2017, "Experimental comparison of a traditionally built versus additively manufactured aircraft heat exchanger"
  • Shawn Siroka, Melissa Shallcross and Stephen Lynch, 2016, "Unsteady heat transfer around low aspect ratio cylinders in an array"
  • Eric Lange, Stephen Lynch and Scott Lewis, 2016, "Computational and experimental studies of the effect of mid-passage gap misalignment on a contoured turbine blade endwall", ASME International Gas Turbine Institute Turbo Expo
  • Shane Haydt, Stephen Lynch and Scott Lewis, 2016, "The effect of meter-diffuser offset in shaped film cooling holes"
  • Stephen Lynch, 2016, "Measurements and predictions of the three-dimensional boundary layer in a turbine blade passage"
  • Corey Anderson and Stephen Lynch, 2015, "Time-resolved stereo-PIV measurements of the horseshoe vortex system in pin fin arrays"
  • Stephen Lynch and Karen A Thole, 2015, "Comparison of the three-dimensional boundary layer on flat versus contoured turbine endwalls"
  • Stephen Lynch and Karen A Thole, 2015, "Heat transfer and film cooling on a contoured blade endwall with platform gap leakage"
  • Ivana Milanovic, John Whiton, Razvan Florea, Stephen Lynch, Greg Tillman and Mark Stucky, 2014, "RANS simulations for sensitivity analysis of compressor transition duct"
  • Stephen Lynch, Karen A Thole, Atul Kohli, Christopher Lehane and Thomas Praisner, 2013, "Endwall heat transfer for a turbine blade with an upstream cavity and rim seal leakage"
  • Stephen Lynch, Karen A Thole, Atul Kohli, Christopher Lehane and Thomas Praisner, 2013, "Aerodynamic loss for a turbine blade with endwall leakage features and contouring"
  • Seth Lawson, Stephen Lynch and Karen A Thole, 2012, "Simulations of multi-phase particle deposition on a non-axisymmetric contoured endwall with film cooling"
  • Stephen Lynch, Karen A Thole, Atul Kohli and Christopher Lehane, 2010, "Computational predictions of heat transfer and film cooling for a turbine blade with non-axisymmetric endwall contouring"
  • Stephen Lynch and Karen A Thole, 2009, "The effect of the combustor-turbine slot and mid-passage gap on vane endwall heat transfer"
  • Stephen Lynch, Sundar Narayan, Karen A Thole, Atul Kohli and Christopher Lehane, 2009, "Heat transfer for a turbine blade with non-axisymmetric endwall contouring"
  • Stephen Lynch and Karen A Thole, 2007, "The effect of combustor-turbine interface gap leakage on the endwall heat transfer for a nozzle guide vane"
  • Eric Moser and Stephen Lynch, , "Compressible streamwise vortices under adverse pressure gradients"

Research Projects

  • September 2022 - August 2025, "REU Site: Lowering the Carbon Footprint through Research in Propulsion andPower Generation," (Sponsor: National Science Foundation).
  • February 2022 - January 2025, "High Temperature Additively Manufactured Monolithic Heat Pipe Radiators," (Sponsor: National Aeronautics and Space Administration).
  • February 2020 - March 2025, "Turbine Cooling through Additive Manufacturing - 56," (Sponsor: Federal Aviation Administration).
  • February 2020 - September 2024, "Combustor Wall Cooling Concepts for Dirt Mitigation," (Sponsor: Federal Aviation Administration).
  • January 2023 - December 2024, "Enhancing Ceramic Matrix Composite (CMC) Temperature Performance in High-Hydrogen Environments Using Field Assisted Sintering Technology.," (Sponsor: U.S. Department of Energy).
  • February 2023 - February 2024, "DURIP: High Speed Volumetric Velocity Measurements," (Sponsor: Office of Naval Research).
  • March 2023 - May 2024, "Advanced Turbine Airfoils for Efficient Combined Heat and Power," (Sponsor: Leidos, Inc.).
  • February 2021 - February 2024, "Effect of Freestream Turbulence on Tip Vortex Breakdown and Decay Mechanisms," (Sponsor: Office of Naval Research).
  • July 2021 - December 2024, "Vat Thermal- and Photo-polymerization Additive Manufacturing for SiC-based CMCs," (Sponsor: U.S. Department of Energy).
  • August 2022 - July 2023, "SBIR: Phase II - High Fidelity Heat Transfer Analysis for Cooled Turbines Using GPU Accelerated CFD," (Sponsor: AeroDynamic Solutions, Inc.).
  • September 2019 - August 2023, "Development of Additive Manufacturing for Ceramic Matrix Composite Vanes," (Sponsor: U.S. Department of Energy).
  • March 2021 - August 2023, "Augmented Heat Exchange in an Aircraft Engine Inlet Duct," (Sponsor: Air Force Research Laboratory).
  • January 2022 - December 2022, "STTR Phase III- Structural Design Optimization for Thermal Management," (Sponsor: Phoenix Analysis & Design Technologies).
  • September 2019 - November 2022, "Topology Optimization of Multifunctional Thermal Management Systems for Aerospace Applications," (Sponsor: National Aeronautics and Space Administration).
  • August 2017 - August 2018, "Optically-Based Volumetric Velocity and Temperature Measurements of Turbulent Junction Flows," (Sponsor: Office of Naval Research).
  • September 2015 - October 2018, "YIP: Effect of Incoming Flow Disturbances on Junction Flow Dynamics and Heat Transfer," (Sponsor: Office of Naval Research).
  • February 2017 - December 2017, "Optimized Lightweight Diesel Engine Waste Heat Recovery Heat Exchangers via Additive Manufacturing," (Sponsor: Volvo Technology North America [MP]).

Honors and Awards

  • George Westinghouse Silver (Young Professional) Medal, American Society of Mechanical Engineers, May 2023
  • Penn State Engineering Alumni Society Outstanding Research, Penn State Engineering Alumni Society, October 2022
  • Associate Fellow, AIAA, October 2021
  • Best Paper, ASME K-14: Gas Turbine Heat Transfer Technical Committee, January 2020
  • Fellow, ASME, July 2020
  • Young Investigator Award, Office of Naval Research, July 2015 - June 2018
  • W. M. Rohsenow Prize, American Society of Mechanical Engineers (ASME), November 2016

Service

Service to Penn State:

  • Academic Leadership and Support Work, Director, Center director, Center for Gas Turbine Research, Education, and Outreach, August 2023

Service to External Organizations:

  • Participation in or Service to Professional and Learned Societies, Co-Chairperson, Vice chair of ASME Gas Turbine Heat Transfer technical committee, American Society of Mechanical Engineers, K-14 Gas Turbine Heat Transfer, July 2024
  • Participation in or Service to Professional and Learned Societies, Director, Deputy Director for Air Breathing Propulsion Technical Committees, American Institute for Aeronautics and Astronautics (AIAA), April 2023
  • Participation in or Service to Professional and Learned Societies, Committee Member, Engineer of the Year Award Committee, American Institute for Aeronautics and Astronautics, October 2021
  • Organizing Conferences and Service on Conference Committees, Co-Organizer, Vanguard Chair (organizer for multiple sessions), Advances in Instrumentation, Diagnostics, and Controls for Applications in Turbomachinery (AIDCAT) Conference, August 2021 - May 2022
  • Participation in or Service to Professional and Learned Societies, Chairperson, Chair, American Institute for Aeronautics and Astronautics (AIAA), Gas Turbine Engines Technical Committee, May 2020 - May 2022
  • Participation in or Service to Professional and Learned Societies, Other, Chair-elect, Chair-elect, American Institute for Aeronautics and Astronautics (AIAA), Gas Turbine Engines Technical Committee, May 2018 - May 2020
  • Participation in or Service to Professional and Learned Societies, Committee Member, Rohsenow Prize subcommittee chair, American Society of Mechanical Engineers, K-14 Gas Turbine Heat Transfer, July 2014 - December 2022
  • Organizing Conferences and Service on Conference Committees, Organizer, Vanguard Chair (organizer for multiple sessions), ASME Turbo Expo, August 2013
 


 

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With more than 60 faculty members, 330 graduate students, and 1,000 undergraduate students, the Penn State Department of Mechanical Engineering embraces a culture that welcomes individuals with a diversity of backgrounds and expertise. Our faculty and students are innovating today what will impact tomorrow’s solutions to meeting our energy needs, homeland security, biomedical devices, and transportation systems. We offer B.S. degrees in mechanical engineering as well as resident (M.S., Ph.D.) and online (M.S.) graduate degrees in mechanical engineering. See how we’re inspiring change and impacting tomorrow at me.psu.edu.

Department of Mechanical Engineering

137 Reber Building

The Pennsylvania State University

University Park, PA 16802-4400

Phone: 814-865-2519