Fluorescent additives which allow the determination of droplet temperatures in hydrocarbon fuel sprays have been developed. These systems, which exploit the chemistry of organic exciplexes; should make possible the determination of droplet temperatures within 1°C. Two specific systems are described: 3,10-dicyanophenanthrene/ diethylaniline over the 20–135 °C range, and naphthalene/tetramethyl-p-phenylene diamine over the 140–265°C range. These additives should allow 2-D real-time nonintrusive visualization of the droplet temperatures in an evolving fuel spray.
© 1985 Optical Society of America
A. M. Murray and L. A. Melton, "Fluorescence methods for determination of temperature in fuel sprays," Appl. Opt. 24, 2783-2787 (1985)