ARSTRAff-Experimental and theoretical studies on the spontaneous ignition proccu of isolated fuel droplets were carried o u t Tiedependent ttmperature fields around the igniting droplets wcrc observed by interferometry so that two step temperature rise can be detected. Some experiments a n pcdomed under microgravity to obtain reference data. Induction times arc examined as a function of ambient temperature As a result a zero temperature codficient region h found, whicb is equivalent to the NTC (negative tempraturc coefficient) region for the ignition of premixed A numerical model is developed applying a simplified chemical reaction model tbet includts 4 e low and the high tempraturc reactions The model is able to rcprodua the two step temperature rise and the roles of the two kinds of reactions on the ignition praccu up to the establishment of a difusion fiame around the droplet are examined.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.