Photo of Stephen Lynch

Stephen Lynch

Associate Professor

Affiliation(s):

  • Mechanical Engineering

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

  • 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
  • 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)
  • 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
  • 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)
  • 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), pp. 051002-1-10
  • 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), pp. 041003-1-10
  • 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), pp. 011019-1-9
  • 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), pp. 041019-1-10
  • Peter Wilkins, Stephen Lynch, Karen A Thole, Tyler Vincent, San Quach and Eleanor Kaufman, , "Experimental investigation into the effect of a ceramic matrix composite surface on film cooling", Journal of Turbomachinery, 144, (12)

Conference Proceedings

  • Evan Lundburg, Stephen Lynch and M. Eric Lyall, 2023, "Heat transfer augmentation with pin fins in the entry region of circular channels", Proceedings of the AIAA SciTech 2023 Forum
  • Jack Medzorian and Stephen Lynch, 2023, "Effect of freestream turbulence on wall-bounded tip vortex breakdown and decay mechanisms", Proceedings of the AIAA SciTech 2023 Forum
  • 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", Proceedings of the 2022 ASME IGTI Turbo Expo
  • 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", Proceedings of the 2022 ASME IGTI Turbo Expo
  • 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", Proceedings of the 2022 ASME IGTI Turbo Expo
  • Stephen Lynch and Matthew Boggio, 2022, "Computational analysis of rotating detonation engine exhaust interacting with a turbine vane", Proceedings of the AIAA SciTech 2022 Forum
  • Bashir Mekki and Stephen Lynch, 2022, "Voxel based three-dimensional topology optimization of heat exchanger fins", Proceedings of the AIAA SciTech 2022 Forum
  • 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", Proceedings of the 2021 ASME International Mechanical Engineering Congress & Expo
  • Alexander Rusted and Stephen Lynch, 2021, "Determining total pressure fields from velocimetry measurements in a transonic turbine flowfield", Proceedings of the 2021 American Society of Mechanical Engineers (ASME) International Gas Turbine Institute (IGTI) Turbo Expo
  • Jayant Rao and Stephen Lynch, 2021, "Large eddy simulation of flow and heat transfer over forward-facing steps with upstream injection", Proceedings of the AIAA SciTech 2021 Forum
  • Jeremy Zuccarello, David Saltzman, Stephen Lynch, Shane Haydt and Christopher Whitfield, 2020, "A steady transonic linear cascade for true scale cooling measurements", Proceedings of the 2020 American Society of Mechanical Engineers (ASME) International Gas Turbine Institute (IGTI) Turbo Expo
  • Kevin Tracy and Stephen Lynch, 2020, "Large eddy simulation of the 777 shaped film cooling hole at axial and compound angle orientations", Proceedings of the 2020 American Society of Mechanical Engineers (ASME) International Gas Turbine Institute (IGTI) Turbo Expo
  • 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", Proceedings of the 2020 American Society of Mechanical Engineers (ASME) International Gas Turbine Institute (IGTI) Turbo Expo
  • Andrew Scott White, David Saltzman and Stephen Lynch, 2020, "Performance analysis of heat sinks designed for additive manufacturing", Proceedings of the 2020 American Society of Mechanical Engineers (ASME) InterPACK Conference
  • Eric Lange and Stephen Lynch, 2020, "The effect of freestream turbulence integral length scale on junction flow behavior", Proceedings of the 2020 AIAA SciTech Conference
  • Bashir Mekki, Joshua Langer and Stephen Lynch, 2020, "Genetic algorithm based topology optimization of heat exchanger fins used in aerospace applications", Proceedings of the 2019 ASME International Mechanical Engineering Congress & Expo
  • Jeremy Zuccarello, Eric Lange and Stephen Lynch, 2019, "Effect of longitudinal vortices on turbulent junction flow heat transfer", Proceedings of the 2019 AIAA Propulsion and Energy Conference
  • Shane Haydt and Stephen Lynch, 2019, "Heat transfer coefficient augmentation for a shaped film cooling hole at a range of compound angles", Proceedings of the 2019 American Society of Mechanical Engineers (ASME) International Gas Turbine Institute (IGTI) Turbo Expo
  • Stephen Lynch, 2018, "Large eddy simulations of low pressure turbine endwall flow and heat transfer", Proceedings of the 2018 ASME International Mechanical Engineering Congress & Expo
  • Michael Bichnevicius, David Saltzman and Stephen Lynch, 2018, "Comparison of louvered plate-fin heat exchangers made via additive manufacturing", Proceedings of the 2018 ASME International Mechanical Engineering Congress & Expo
  • Shane Haydt and Stephen Lynch, 2018, "Cooling effectiveness for a shaped film cooling hole at a range of compound angles", Proceedings of the 2018 American Society of Mechanical Engineers (ASME) International Gas Turbine Institute (IGTI) Turbo Expo
  • Shane Haydt and Stephen Lynch, 2018, "Flowfield of a shaped film cooling hole over a range of compound angles", Proceedings of the 2018 ASME IGTI Turbo Expo
  • Eric Lange, Syed Elahi and Stephen Lynch, 2018, "Time-resolved PIV measurements of the effect of freestream turbulence on horseshoe vortex dynamics", Proceedings of the 2018 AIAA SciTech Conference
  • Syed Elahi, Zachary Moul, Eric Lange and Stephen Lynch, 2018, "Unsteady heat flux measurements of junction flow with Reynolds number and freestream turbulence effects", Proceedings of the 2018 AIAA SciTech Conference
  • Syed Elahi, Eric Lange and Stephen Lynch, 2017, "Experimental measurements of turbulent junction flow using high speed stereo PIV and IR thermography", Proceedings of the 2017 AIAA Aviation Conference
  • 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", Proceedings of the 2017 ASME IGTI Turbo Expo, ASME International Gas Turbine Institute Turbo Expo
  • Kirsten Muirhead and Stephen Lynch, 2017, "A computational study of combustor dilution flow interaction with turbine vanes", Proceedings of the 2017 AIAA SciTech Conference
  • 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", Proceedings of the 2017 AIAA SciTech Conference
  • Shawn Siroka, Melissa Shallcross and Stephen Lynch, 2016, "Unsteady heat transfer around low aspect ratio cylinders in an array", Proceedings of the 2016 ASME International Mechanical Engineering Congress & Expo, ASME IMECE
  • 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", Proceedings of the 2016 ASME IGTI Turbo Expo, 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", Proceedings of the 2016 ASME IGTI Turbo Expo
  • Stephen Lynch, 2016, "Measurements and predictions of the three-dimensional boundary layer in a turbine blade passage", Proceedings of the 2016 AIAA SciTech Conference
  • Corey Anderson and Stephen Lynch, 2015, "Time-resolved stereo-PIV measurements of the horseshoe vortex system in pin fin arrays", Proceedings of the 2015 AIAA Propulsion & Energy Conference
  • Stephen Lynch and Karen A Thole, 2015, "Comparison of the three-dimensional boundary layer on flat versus contoured turbine endwalls", Proceedings of the 2015 ASME IGTI Turbo Expo
  • Stephen Lynch and Karen A Thole, 2015, "Heat transfer and film cooling on a contoured blade endwall with platform gap leakage", Proceedings of the 2015 ASME IGTI Turbo Expo
  • Ivana Milanovic, John Whiton, Razvan Florea, Stephen Lynch, Greg Tillman and Mark Stucky, 2014, "RANS simulations for sensitivity analysis of compressor transition duct", Proceedings of the 2014 AIAA Propulsion & Energy Conference
  • 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", Proceedings of the 2013 ASME IGTI Turbo Expo
  • 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", Proceedings of the 2013 ASME IGTI Turbo Expo
  • Seth Lawson, Stephen Lynch and Karen A Thole, 2012, "Simulations of multi-phase particle deposition on a non-axisymmetric contoured endwall with film cooling", Proceedings of the 2012 ASME IGTI Turbo Expo
  • 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", Proceedings of the 2010 ASME IGTI Turbo Expo
  • Stephen Lynch and Karen A Thole, 2009, "The effect of the combustor-turbine slot and mid-passage gap on vane endwall heat transfer", Proceedings of the 2009 ASME International Mechanical Engineering Congress and Expo
  • Stephen Lynch, Sundar Narayan, Karen A Thole, Atul Kohli and Christopher Lehane, 2009, "Heat transfer for a turbine blade with non-axisymmetric endwall contouring", Proceedings of the 2009 ASME IGTI Turbo Expo
  • 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", Proceedings of the 2007 ASME IGTI Turbo Expo
  • Peter Wilkins, Stephen Lynch, Karen A Thole, San Quach, Tyler Vincent and Dominic Mongillo, , "Effect of a ceramic matrix composite surface on film cooling performance", Proceedings of the 2021 American Society of Mechanical Engineers (ASME) International Gas Turbine Institute (IGTI) Turbo Expo
  • Teri Baker, Michael Manahan, Stephen Lynch and Edward Reutzel, , "Effect of surface roughness and hydraulic diameter on additively manufactured offset strip fin heat exchanger coupons", Proceedings of the 2022 ASME Summer Heat Transfer Conference
  • Brandon Fallon, Kyle McFerran, Sarah Fox, Karen A Thole, Stephen Lynch, Ryan Lundgreen and Stephen Kramer, , "Comparison of dirt deposition on double-walled combustor liner geometries", Proceedings of the 2023 ASME IGTI Turbo Expo
  • Evan Lundburg, Stephen Lynch, Kevin Liu, Hongzhou Xu and Michael Fox, , "The effect of meter-diffuser angular offset on film cooling hole adiabatic effectiveness", Proceedings of the 2023 ASME IGTI Turbo Expo
  • Peter Wilkins, Stephen Lynch and Karen A Thole, , "The impact of multi-scale ceramic matrix composite roughness on heat transfer and boundary layer behavior", Proceedings of the 2023 ASME IGTI Turbo Expo
  • Andrew Fox, Stephen Lynch, Jason Young, Carl Frick, Jennifer Hankins, Kyle Kuhn, Stephan Brinckmann and Ray Fertig III, , "Design and cooling performance of additively manufactured ceramic turbine vanes", Proceedings of the 2023 ASME IGTI Turbo Expo

Research Projects

  • September 2015 - October 2018, "YIP: Effect of Incoming Flow Disturbances on Junction Flow Dynamics and Heat Transfer," (Sponsor: Office of Naval Research).
  • August 2017 - August 2018, "Optically-Based Volumetric Velocity and Temperature Measurements of Turbulent Junction Flows," (Sponsor: Office of Naval Research).

Honors and Awards

  • Penn State Engineering Alumni Society Outstanding Research, Penn State Engineering Alumni Society, October 2022 - October 2022
  • Best Paper, ASME K-14: Gas Turbine Heat Transfer Technical Committee, January 2020
  • W. M. Rohsenow Prize, American Society of Mechanical Engineers (ASME), November 2016
  • W. M. Rohsenow Prize, American Society of Mechanical Engineers (ASME), November 2010
  • Young Investigator Award, Office of Naval Research, July 2015
  • Fellow, ASME, July 2020
  • Associate Fellow, AIAA, October 2021

Service

Service to Penn State:

Service to External Organizations:

  • Organizing Conferences and Service on Conference Committees, Organizer, Vanguard Chair (organizer for multiple sessions), co-Point Contact for Heat Transfer tracks, 2023 ASME IGTI Turbo Expo, October 2022 - June 2023
  • Organizing Conferences and Service on Conference Committees, Organizer, Vanguard Chair (organizer for multiple sessions), Co-organizer, Penn State Center for Gas Turbine Research, Education, and Outreach, 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 2014
  • 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