报告摘要：

The undesirable effects of soot aerosol emissions and the morphology of soot aggregates on the earth’s climate and the wellbeing of humans have been recognized for a long time. However, the mechanisms of formation processes of soot in combustion have not been understood well and only a few principles have been established firmly. The soot formation is an artifact of the non-premixed combustion and the pressure has a significant degree of influence on soot processes. Engines used in transportation and power production operate at pressures exceeding 40 atm in gas turbines and 100 atm in diesel engines for thermal efficiency and compactness concerns. However, tractable soot related measurements at elevated pressures are limited and most of the available soot and soot morphology information available in the literature is relevant to atmospheric conditions. Since the chemical reactions governing the various flame processes are intrinsically nonlinear, the responses of combustion events to pressure changes are not usually monotonic. Therefore, it is challenging to scale measurements in atmospheric flames to high-pressure combustion. In order to gain insight into the underpinnings of soot processes, soot and soot morphology measurements are desirable under engine-relevant pressures. In this talk, soot and soot morphology measurements at elevated pressures at UTIAS in non-premixed laminar flames of various gaseous and liquid fuels will be presented and the relevance of the results to practical combustion systems will be discussed.

报告人介绍：

Prof. Gülder is a full professor at the Institute for Aerospace Studies (UTIAS) in University of Toronto since 2001 and was associate director of UTIAS from 2007 to 2016. Before joining UTIAS as a faculty member, he worked as a researcher and then as the section head of the combustion laboratory at the National Research Council of Canada.  Prof. Gülder completed his PhD at the University of Manchester, UK, and his undergraduate and MSc degrees at the Middle East Technical University, Turkey. His current research interests include high pressure combustion, soot formation, turbulent combustion, bio-fuels for aviation, and aviation fuel thermal stability. He has published over 300 papers on combustion related subjects and served on the editorial boards of Combustion and Flame, International Journal of Thermal Sciences, and International Journal of Engine Research. He shares three patents on non-intrusive soot diagnostics. He was the chair of the Canadian Section of the Combustion Institute for 10 years and was on the board of directors of the Combustion Institute for 12 years. In addition to his fundamental research activities in combustion and propulsion, he is involved in industrial research efforts in collaboration with the major gas turbine engine manufacturers in Canada. Prof. Gülder is also a fellow of the Canadian Academy of Engineering.