1993

1. Film-Cooling From Holes with Compound Angle Orientations (P. M. Ligrani), Invited Paper, Second Colloquium on Turbomachinery, TPMRC-Turbo and Power Machinery Research Center, Seoul National University, Seoul, South Korea, June 27 – July 2, 1993.

2001

2. Interactions and Influences of Different Physical Effects With Film Cooling, (P. M. Ligrani), Invited Paper, Ukraine-US Workshop on Innovative Combustion and Aerothermal Technologies in Energy and Power Systems, Kiev, Ukraine, May 20-26, 2001.

2006

3. Dimple Array Effects on Turbulent Heat Transfer and Flow Structure (P. M. Ligrani), Keynote Lecture, Fifth International Symposium on Turbulence, Heat, and Mass Transfer, Dubrovnik, Croatia, September 25-29, 2006.

2007

4. Smart Materials and Smart Structures for Aerodynamicists: Benefits, Challenges, Opportunities, Visions. Invited Lecture – Aerospace 2030 – The Role of Smart Materials, Begbroke Centre for Innovation and Enterprise, Department of Engineering Science, Oxford University, Oxford, England, United Kingdom, November 27, 2007.

2008

5. Technology Trends in the Gas Turbine Industry (P. M. Ligrani), Invited Keynote Paper – 4th International Conference on the Future of Gas Turbine Technology, European Turbine Network Conference, Brussels, Belgium, October 15, 2008.

2010

6. Fluid Mechanics Research at Saint Louis University (M. McQuilling, R. LeBeau, P. M. Ligrani), Invited Lecture, Air Mobility Command (AMC) – Air Force Research Laboratory (AFRL) Symposium, Innovative Aerodynamics: Potential Solutions for Improving Mobility Efficiency, Fairview Heights, Illinois, USA, November 30, 2010.

2011

7. New Developments in Continuous SPLITT Fractionation (P. M. Ligrani), Invited Lecture, 15th International Symposium on Field- and Flow-Based Separations (FFF2011), CASSS – International Separation Science Society, South San Francisco Conference Center, South San Francisco, California, USA, May 23-25,2011.
8. Aerodynamic Losses in Turbines With and Without Film Cooling (P. M. Ligrani), Invited Keynote Paper, IGTC’11 Osaka, International Gas Turbine Congress 2011 Osaka, 10th Congress in Japan, Gas Turbine Society of Japan, Osaka, Japan, November 13-18, 2011.
9. Aerodynamic Loss Determination and Evaluation in Turbine Components (P. M. Ligrani), Invited Keynote Paper, 11th Asian International Conference on Fluid Machinery, and 3rd Fluid Power Technology Exhibition, Indian Institute of Technology, Madras, Chennai, India, November 21-23, 2011.

2012

10. Spiral Inertial Microfluidic Devices For Continuous Blood Cell Separation (N. Nivedita, P. M. Ligrani, and I. Papautsky), Invited Paper, Paper Number 8251-26, MOEMS-MEMS Conference on Micro- and Nano-Fabricated Electromechanical and Optical Components, SPIE – International Society for Optics and Photonics, San Francico, California, USA, January 21-26, 2012.
11. Heat Transfer Augmentation Technologies for Internal Cooling of Turbine Components of Gas Turbine Engines (P. M. Ligrani), Invited Keynote Paper, Invited Expert, Fourth International Symposium on Jet Propulsion and Power Engineering, 4th ISJPPE Meeting, Northwestern Polytechnical University (NPU), Xi’an, P. R. China, September 10-12, 2012.
12. Turbine Research at Saint Louis University (M. McQuilling, and P. M. Ligrani), Invited Lecture, Turbine Engine Technology Symposium (TETS), Dayton Convention Center, Dayton, Ohio, USA, September 10-13, 2012.
13. New Developments in Surface Heat Transfer Augmentation Technologies as Applied to Internal Flow Environments (P. M. Ligrani), Invited Plenary Keynote Paper, ISTP-23, The 23rd International Symposium on Transport Phenomena, The University of Auckland, Auckland, New Zealand, November 19-22, 2012.

2013

14. Recent Developments in Impingement Array Cooling, Including Consideration of the Separate Effects of Mach Number, Reynolds Number, Temperature Ratio, Hole Spacing, and Jet-to-Target Plate Distance (P. M. Ligrani), Plenary Lecture as an Invited Keynote Speaker, IWHT2013, 2nd International Workshop on Heat Transfer Advances for Energy Conservation and Pollution Control, Northwestern Polytechnical University (NPU), Xi’an, P. R. China, October 18-21, 2013.
15. Evolution of Secondary Dean Vortices in Spiral Microchannels for Cell Separations (N. Nivedita, P. M. Ligrani, and I. Papautsky), Invited Lecture, Miniaturized Systems for Chemistry and Life Sciences MicroTAS 2013, University of Freiburg, Freiburg, Germany, October 27-31, 2013.

2014

16. Recent Heat Transfer and Aerodynamics Research Developments For Application to Turbine Components of Gas Turbine Engines (P. M. Ligrani), Invited Lecture, Academic Forum on Gas Turbine Technology, Opening Ceremony for the Institute of Gas Turbines, Beijing Tsinghua University, Beijing, P. R. China, February 27-28, 2014.
17. Aerodynamics Losses From Turbine Components Within Gas Turbine Engines (P. M. Ligrani, A. Fatemi, and G. Potts), Invited Keynote Paper, Fifth International Symposium on Jet Propulsion and Power Engineering, 5th ISJPPE Meeting, Beihang University, Beijing, P. R. China, September 15-19, 2014.

2015

18. Swirl Chambers: Flow Structure and Surface Heat Transfer (P. M. Ligrani), Invited Plenary Paper, ICHHFF5, Fifth International Conference “Heat and Mass Transfer and Hydrodynamics in Swirled Flows,” National Committee of the Russian Academy of Sciences, Kazan, Russia, October 19-21, 2015.
19. Arrays of Surface Dimples: Flow Structure and Surface Heat Transfer (P. M. Ligrani), Invited Plenary Paper, ICTE 2015, International Conference: “IX Workshop on Thermophysics and Power Engineering for Higher Education Institutions,” Ministry of Education and Science of the Russian Federation, Kazan State Power Engineering University, Kazan, Russia, October 21-24, 2015.

2016

20. Onset and Transition to Elastic Turbulence: Effects of Rheological Property Variations For Polyacrylamide-Water Solutions (B. Lund, P. M. Ligrani, and A. Fatemi), Invited Paper, 20th International Colloquium Tribology – Industrial and Automotive Lubrication, Stuttgart / Ostfildern, Germany, 12-14 January 2016.
21. Turbine Component Aerodynamic Losses Within Gas Turbine Engines (P. M. Ligrani), Invited Lecture, “China-Germany Workshop on Gas Turbine Technologies: Aerodynamics, Heat Transfer, and Combustion,” ITLR-Institute of Aerospace Thermodynamics, University of Stuttgart, Stuttgart, Germany, and Shanghai Jiao Tong University, Shanghai, P. R. China, July 18-20, 2016.

2017

22. Vortex Structure Effects on Impingement, Effusion, and Cross Flow Cooling of a Double Wall Configuration (P. M. Ligrani), Invited Plenary Keynote Paper, ICHHFF6, Sixth International Conference “Heat and Mass Transfer and Hydrodynamics in Swirling Flows,” National Committee of the Russian Academy of Sciences, Novosibirsk, Russian Federation, November 21-23, 2017.

2018

23. Aerospace and Aeronautical Engineering at the University of Alabama in Huntsville (P. M. Ligrani), Plenary Lecture, 2018 ASE International Week, Forum of the Future of Aerospace Engineering, School of Aeronautic Science and Engineering (ASE), Beihang University, Beijing, P. R. China, September 12-14, 2018.
24. Heat Transfer Enhancements From Elastic Turbulence Within Rotating Couette Flow Using Sucrose-Based Polymer Solutions (P. M. Ligrani), Plenary Lecture, ICAYS – 2018 International Conference in Aerospace for Young Scientists, School of Aeronautic Science and Engineering (ASE), Beihang University, Beijing, P. R. China, September 15-16, 2018.
25. Investigations of Normal Shock Wave Unsteadiness (P. M. Ligrani), Invited Paper, First International Symposium on Advances in Aerodynamics, Chengdu, Sichuan Province, P. R. China, December 14-15, 2018.

2019

26. Recent Research Developments for Turbine Blade Tip Heat Transfer, Including Development and Effects of Tip Leakage Vortices (H. Collopy, M. Sampson, and P. M. Ligrani), Invited Plenary Keynote Paper, HMTHSF-2019, Seventh International Conference “Heat and Mass Transfer and Hydrodynamics in Swirling Flows,” National Committee on Heat and Mass Transfer of the Russian Academy of Sciences, Rybinsk, Russian Federation, October 16-18, 2019.
27. Academic and University Roles and Partnerships in the Development of Hypersonic Weapons (P. M. Ligrani), Invited Keynote Paper, 1st Annual Hypersonic Weapons Summit, 2019 Hypersonic Weapons Conference, IDGA – Institute for Defense and Government Advancement, Washington, D.C., USA, October 28-30, 2019.

2020

28. Physical Phenomena Associated With Hypersonic Weapon Vehicles (P. M. Ligrani), Invited Briefing Paper, 2nd Annual Hypersonic Weapons Summit, Digital Summit, 2020 Hypersonic Weapons Conference, IDGA – Institute for Defense and Government Advancement, Washington, D.C., USA, March 31-April 2, 2020.
29. Physical Phenomena Associated With Hypersonic Weapon Vehicles (P. M. Ligrani), Invited Briefing Paper, Hypersonic Weapon Systems, Digital Summit, IQPC, Defense iQ, London, England, United Kingdom, June 30-July 1, 2020.
30. Hypersonic Weapon Vehicles: Physical Effects and Phenomena (P. M. Ligrani), Invited Briefing Paper, Countermeasures Hypersonic Weapons Summit, Digital Summit, 2020 Hypersonic Weapons Conference, IDGA – Institute for Defense and Government Advancement, Washington, D.C., USA, July 23-24, 2020.
31. Fostering Hypersonic Innovation Through Decisive Academic Research and Collaboration (P. M. Ligrani), Invited Briefing Paper, Hypersonic Weapons Summit, Digital Summit, 2020 2nd Annual Hypersonic Weapons Conference, IDGA – Institute for Defense and Government Advancement, Washington, D.C., USA, October 28-30, 2020.
32. R&D in Experimental Heat Transfer Diagnostics for Supersonic and Hypersonic Flow Environments (P. M. Ligrani), Invited Briefing Paper, Autonomous and Hypersonic Weapons Systems Conference, Technology Training Corporation (TTC), Washington, D.C., USA, November 4-6, 2020.

2021

33. Recent Investigations of Transonic, Supersonic, and Hypersonic Flow Phenomena (P. M. Ligrani), Invited Keynote Paper, 4th International Conference and Expo on Aerospace and Aeronautical Engineering (ICEAAE-2021, Aerospace-2021), Valencia, Spain, Virtual Event, October 25-27, 2021.
34. Surface Heat Transfer Characteristics of Transonic Turbine Blade Tip Configurations With and Without Film Cooling (P. M. Ligrani), Invited Keynote Paper, 2021 3rd International Conference on Mechanical, Aerospace and Automotive Engineering (CMAAE 2021), Sponsored by the Hong Kong Society of Robotics and Automation and the Central South University (P. R. China), Changsha, P. R. China, Online Event, December 3-5, 2021.

2022

35. Effects of Pressure Side Film Cooling Hole Placement and Condition on Surface Heat Transfer Characteristics of a Transonic Turbine Blade Tip (P. M. Ligrani), Invited Plenary Paper, Global Experts Conference on Applied Science, Engineering and Technology (GECAET-2022), Virtual Conference and Amsterdam, Netherlands, July 28-29, 2022.
36. Radiation Tracking Literature Overview (P. M. Ligrani), Invited Esteemed Speaker, 2022 Hypersonic Weapons Summit, 4th Annual Hypersonic Weapons Summit, Institute for Defense and Government Advancement (IDGA) of the International Quality and Productivity Center (IQPC) (London, England, United Kingdom), Arlington, Virginia, USA, September 28-29, 2022.
37. Utilization of Electromagnetic Radiation for Detection, Tracking, and Characterization of Hypersonic Vehicles (P. M. Ligrani), Invited Paper, Hypersonic Defense Conference and Exhibition, Intelligence-SEC (Buckinghamshire, England, United Kingdom), Huntsville, Alabama, USA, November 8-9, 2022.

2023

38. Recent Investigations of Transonic, Supersonic, and Hypersonic Flow Phenomena (P. M. Ligrani), Invited Plenary Paper, Third International Forum on Aerospace and Aeronautics (AEROFORUM 2023), San Diego, California, USA, December 11-13, 2023.

2024

39. Development of Innovative and Unique Pumping Concepts and Devices with Micro-, Millimeter-, and Macro-Scale Flow Passage Arrangements (P. M. Ligrani). Invited Plenary Lecture. Fluids Engineering Division Summer Meeting (FEDSM 2024), American Society of Mechanical Engineers (ASME), Anaheim, California, USA. July 15-17, 2024.
40. Control of Shock Waves and Associated Flow Structure in Supersonic and Hypersonic Flow Environments (P. M. Ligrani). Invited Lecture. Hypersonic Defense Conference and Exhibition, Intelligence-SEC (Buckinghamshire, England, United Kingdom), Arlington, Virginia, USA, October 29-30, 2024.

2025

41. Design, Development, and Performance of Innovative Micro-Scale, Millimeter-Scale, and Macro-Scale Pumping Devices (P. M. Ligrani). Invited Keynote Lecture. Fluid Applications and Systems Technical Committee (FASTC), Fluids Engineering Division Summer Meeting (FEDSM 2025), American Society of Mechanical Engineers (ASME), Philadelphia, Pennsylvania, USA. July 27-30, 2025.
42. Vortex Development and Quantification Within Complex Mechanical and Aerospace Engineering Flow Environments (P. M. Ligrani). Invited Lecture. VORTEX2025 International Conference – Toward World Consensus on Vortex Definition and Prediction, National Science Foundation and the University of Texas at Arlington, Arlington, Texas, USA. December 13-16, 2025.