时间：12月20日 周五 下午2:00
Low-temperature combustion processes such as cool flames, warm flames, and ignition assisted low temperature flames play a critical role in the performance of advanced engines and fuel development. In this seminar, a review of the recent progresses in low-temperature flame chemistry and dynamics as well as their impacts on combustion, engine and fuel development will be presented. Specifially, at first, experimental estabilishment and computational modeling of the propagation speeds and burning limits of diffusion and premixed cool flames and warm flames will be introduced. The flammability limit diagrams and temperature-dependent chain-branching reaction pathways for hot, warm, and cool flames will be discussed and analyzed. Secondly, the effect of low temperature auto-ignition at high ignition Damköhler numbers on laminar and turbulent flames speeds will be examined. Thirdly, the impacts of low-temperature combustion on engine knock, deflagaration to detonation transition, fuel design, and chemical kinetic model development will be presented. Finally, future research on low temperature combustion and control of low tempreature combustion in advanced engines will be discussed.
Yiguang Ju is the Robert Porter Patterson Professor at Princeton University. He received his bachelor degree in Engineering Thermo-physics from Tsinghua University in 1986, and his PhD degree in Mechanical and Aerospace Engineering from Tohoku University (Japan) in 1994. He was appointed as an Assistant and Associate Professor at Tohoku University from 1995 to 1999, and as a Chang-Jiang Professor and the Director of Thermo-physics Institute at Tsinghua University in 2000. He joined Princeton University in 2001. Ju’s research interests include combustion and propulsion in the areas of near limit combustion, microscale combustion, plasma assisted propulsion, alternative fuels, multiscale modeling, and functional nano-materials. He is an ASME Fellow and a Fellow of the Combustion Institute. He is serving as the chair of US Sections of the Combustion Institute and a board member of the Combustion Institute and ICDERS. He is an Associate Editor for AIAA Journal, Proceedings of Combustion Institute, Combustion Science and Technology, and Frontiers in Energy. He received Bessel Research Award from von Humboldt Foundation, NASA Director’s appreciation award, and the International Prize of Japanese Combustion Society.