时间：第一场 2023年8月22日 14:00  第二场 2023年8月23日 9:00

地点：机械与动力工程学院 F310会议室

报告人：Prof. Chung K. Law（Princeton University and Tsinghua University）

邀请人：齐飞 教授、夏溪 副教授（航空动力研究所）

Biography

Professor Chung K. Law is the Robert H. Goddard Professor at Princeton University and the founding director of the Center for Combustion Energy at Tsinghua University. His research interests are in combustion, propulsion, heat and mass transfer, energy, alternative fuels, and the environment. He has published over 600 journal papers with a current Google h-index of 121, and has received a number of honorific professional awards. He is a former president of the Combustion Institute; a member of the US National Academy of Engineering; a fellow of the American Society of Mechanical Engineers, the American Institute of Aeronautics and Astronautics, the American Physical Society, the American Academy of Arts and Sciences, the American Association for the Advancement of Science, and the Combustion Institute.

题目：On Rational Interpretation of Some Combustion Phenomena: Comparing Apples to Apples

Abstract

Reporting and understanding of scientific phenomena are frequently communicated through the relation between input and response parameters. When interpreting an observed or calculated result, a key process or its quantifying parameters could also be missed again leading to either biased or incomplete understanding. As such, it is essential to recognize the fundamental physical and chemical processes governing the phenomenon under investigation, being vigilant to compare apples to apples. For illustration, the seminar will cover a few essential topics in combustion research.

题目：On Kinetics and Limits of Explosions

Abstract

The presentation reviews recent theoretical development on the incipient ignition induced by radical runaway in systems controlled by complex chemistry. Employing eigenvalue analysis backed by computation, we obtained explicit expressions and criteria that well reproduce the characteristic Z-shaped response in the pressure-temperature plot. Subsequently, we evaluated the role of hydrogen addition on the explosion limits of mixtures of hydrogen with either carbon monoxide or methane. Then, the general situation of the explosion limits of hydrogen versus the C1-to-C3 alkanes was studied. It is concluded that the change-over, pivot, state distinguishing the opposite effects of hydrogen addition in alkane mixtures in causing explosion is the upper turning point of the Z-curve.