• Dr. Tim Lieuwen
  • Georgia Institute of Technology
  • Holden Auditorium
  • 4:00 p.m.
  • Faculty Host: Dr. Lin Ma

Major progress has been made over the last decade in quantitative understanding of how premixed flames respond to flow oscillations.  Understanding these interactions is critical in order to understand the factors controlling combustion instabilities, which have emerged as one of the leading challenges associated with low NOx combustion technologies.  This talk will describe the key processes controlling the flame response - flame anchoring, excitation of wrinkles by flow oscillations, tangential convection of wrinkles upon the flame, and kinematic restoration- and also show that different processes dominate in the near, mid-, and farfield of the flame. 

Biography: 

Dr. Tim Lieuwen is a Professor in the School of Aerospace Engineering and the Executive Director of the Strategic Energy Institute at Georgia Tech.  Prof. Lieuwen is a top international authority on clean energy, particularly low emissions combustion.  He has authored or edited 4 combustion books, including the textbook "Unsteady Combustor Physics".  He has also authored 7 book chapters, 90 journal articles in leading journals, and over 170 other papers, and received 3 patents.  He is a member of the National Petroleum Counsel and is Editor-in-chief of an American Institute of Aeronautics and Astronautics book series.  Dr. Lieuwen is a board member of the ASME International Gas Turbine Institute, and is past chair of the Combustion, Fuels, and Emissions technical committee of the American Society of Mechanical Engineers.  He is also an associate editor of Combustion Science and Technology and the Proceedings of the Combustion Institute, and has served as associate editor for the AIAA Journal of Propulsion and Power.  Prof. Lieuwen is a Fellow of the ASME, an Associate Fellow of AIAA, and has been a recipient of the AIAA Lawrence Sperry Award and the ASME Westinghouse Silver Medal. Other awards include ASME best paper awards, Sigma Xi Young Faculty Award, and the NSF CAREER award.