title: Temperature and pressure imaging using infrared planar laser-induced fluorescence.
abstract: A new diagnostic technique for measurements of temperature and pressure distribution in gaseous flows has been developed. The technique, based on infrared planar laser-induced fluorescence (IR-PLIF), is applicable to all IR-active species. A simple two-line excitation approach is used for measurements of temperature, while pressure measurements utilize online excitation on one rotational line and offline excitation on another. A demonstration of the technique in a supersonic underexpanded jet of 30% CO2 and 70% N2 was performed, and the results are, to the best of our knowledge, the first demonstration of temperature and pressure imaging using IR-PLIF. The developed diagnostic shows potential for single-shot two-dimensional measurements of temperature and pressure in gaseous flows.
authors.affiliation: Mechanical Engineering Department, University of Wisconsin-Madison, 1500 Engineering Drive, Madison, Wisconsin 53706, USA. rothamer@wisc.edu
authors.forename: David A
authors.initials: DA
authors.lastname: Rothamer
authors.forename: Ronald K
authors.initials: RK
authors.lastname: Hanson