Autoignition of Single Droplets of Two-Component Liquid Fuels

Abstract

Measurements and predictions of the ignition delay time of single droplets of several twocomponent mixtures at atmospheric pressure are presented. The results show that ignition is controlled by the more volatile component o r the mixture. The ignition delay time is found to be nearly independent of species transport in the liquid phase. Mixture reaction rates are shown to be adequately modelled by simple linear combination of component rate data.

Single droplet ignition: Theoretical analyses and experimental findings

“…In the first configuration, a fiber-suspended droplet is exposed to a hot, stagnant environment in a preheated furnace, and the ignition delay time is measured, based on an appropriate ignition criterion, by using an optical technique. This approach has been used by Nishiwaki [35], El-Wakil and Abdou [36], Faeth and Olson [25], Kadota et al [37], Saitoh et al [26], Bergeron and Hallett [38,39], Tanabe et al [40,41], Marchese et al [42,43], and many others. The second configuration involves a freely falling droplet in a furnace or a droplet injected into a heated stream.…”

An experimental examination of combustion of isolated liquid fuel droplets with polymeric and nanoparticle additives

“…By developing a model, Bergeron et al [48] showed that the ignition of binary droplets is controlled by the more volatile component. Experiments and numerical analysis have also suggested that increasing the concentration of more volatile component can significantly reduce the ignition delay [49,50].…”

Cool-Flame Behaviors of an n-Decane/Ethanol Binary-Fuel Droplet in Microgravity

“…Since the fundamental mechanisms such as vaporization and chemical reactions greatly depend on fuel composition, it is important to study on the spontaneous-ignition behaviors of alkane/ethanol binary-fuel droplets. Some of the previous studies treated the spontaneous ignition of binary-fuel droplets [5][6][7][8] . However, most of them studied hydrocarbon/hydrocarbon fuels, and the study on hydrocarbon/alcohol fuel is very limited 8) .…”