MEASUREMENTS AND MODELING OF ACETONE LASER-INDUCED FLUORESCENCE WITH IMPLICATIONS FOR TEMPERATURE-IMAGING DIAGNOSTICS

Recent determinations of the temperature dependence of acetone fluores cence have permitted the application of acetone planar laser-induced f luorescence imaging, which was already popular for mapping concentrati on, to the measurement of temperature. With a view toward developing t emperature-imaging diagnostics, we present atmospheric-pressure fluore scence and absorption results acquired with excitation at eight wavele ngths across the absorption feature of acetone and at temperatures fro m 300 to 1000 K. Modeling of the fluorescence yield of acetone is show n to be useful in explaining both these results and the variation of a cetone fluorescence with pressure and composition that was observed in several studies. The model results in conjunction with the photophysi cs data provide guidance for the application of temperature diagnostic s over a range of conditions while also suggesting useful multiparamet er imaging approaches. (C) 1998 Optical Society of America.