Laser Absorption Spectroscopy for Combustion Diagnosis and Trace Gas Sensing

Time：08 Sep. 2018Source：航空航天学院英文网Author：安婉Click：32

DateSeptember 8, 2018
Time15:00-16:00
VenueRoom 326, Building 5, SAA, Yuquan Campus
SpeakerDr. Chang Liu, Lecturer, University of Edinburgh
AbstractLaser absorption spectroscopy (LAS) has been rapidly developed and widely applied to gas monitoring in varies applications, such as combustion diagnosis, environmental monitoring and breath analysis. As a cost-effective tool for measuring multiple gas parameters, LAS provides unique properties in terms of accuracy and sensitivity for understanding the reactions and kinetics in reactive flows. To satisfy the increasing demands for harsh measurements, we developed a series of LAS tomographic sensors and instrumentations targeting at increasing the accuracy and suitability for practical applications. Spatially/temporally-resolved distributions of the combustion parameters are successfully retrieved to better understand the thermal processes in the complicate anAd turbulent flow fields. In addition, a mobile laser-based gas analyzer was developed at low cost and reduced size, offering new opportunities in detecting near-sourceemissions and investigating their spatial and temporal variability.
SpeakerDr. Chang Liu received the B. Sc. degree in automation from Tianjin University, China, in 2010, and the Ph.D. degree in testing, measurement technology and instrument in Beihang University, China, in 2016. From April 2016 to January 2018, he was a postdoctoral researcher in the department of air pollution and environmental technology, Empa-Swiss Federal Laboratories for Materials Science and Technology (ETH Domain), Dubendorf, Switzerland. He is now a lecture in the Agile Tomography Group at the School of Engineering, University of Edinburgh. Dr Liu's current research interests include laser absorption spectroscopy (LAS), LAS tomography, and their applications to reacting flow-fields diagnostics and trace gas sensing.


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