Oleg Kogan with Dr. Chih-Jen Sung, (Mech./Aero. Engr.)

 Quantitative Temperature Measurement in Reacting and Non-Reacting Flows by Vibrational and Rotational Raman Spectroscopy

Non-intrusive techniques for measurement of scalar and hydrodynamic structures of a flow field have obvious advantages over the intrusive ones, as they do not modify the flow field itself.  Using laser-based techniques to study the structure of a  flow field are especially helpful because of the associated high temporal and spatial resolutions.

      In the present study, we plan to utilize Raman spectroscopy to measure the temperature distributions in reacting and non-reacting flows. Particular interests include (1) the determination of the temperature based on the vibrational and rotational Raman spectra and the comparison of these vibrational- and rotational- Raman determined temperatures; and (2) the theoretical calculations of the corresponding Raman spectra.