Dynamics of Premixed Flames in Unsteady Flow Fields
The next presentation in the Turbomachinery Distinguished Lecture Series, featuring Tim Lieuwen, Regents’ Professor, David S. Lewis, Jr. Chair, and Executive Director of the Strategic Energy Institute at Georgia Tech University, will be held on Wednesday, November 7, 2018 from 4:10 PM – 5:00 PM in the James J. Cain ’51 Building (ENPH) Room 202. The topic will be “Dynamics of Premixed Flames in Unsteady Flow Fields.”
Biography
Dr. Tim Lieuwen is Regents’ Professor and the David S. Lewis, Jr. Chair, as well as the Executive Director of the Strategic Energy Institute at Georgia Tech. Dr. Lieuwen is an international authority on combustion and clean energy. He has authored 4 books and over 350 other publications. Board positions include appointment by the DOE Secretary to the National Petroleum Counsel, board of governors of Oak Ridge National Lab, and board member of the ASME International Gas Turbine Institute.
He is an elected member of the National Academy of Engineering, a fellow of ASME and AIAA, and recipient of the AIAA Lawrence Sperry Award, ASME’s George Westinghouse Gold Medal, NSF CAREER award, and various best paper awards.
Abstract
The operational limits of modern power generation and propulsion devices are strongly influenced by the combustor. For example, combustion instabilities have emerged as one of the leading challenges associated with low emissions
combustion technologies. A key fundamental issue associated with these instabilities is understanding the manner in which flames respond to flow disturbances. This talk will describe the key processes controlling the flame response – flame anchoring, excitation of wrinkles by flow oscillations, “memory” effects associated with convection of wrinkles upon the flame, and nonlinear effects due to kinematic restoration.