Abstract
The work investigates theoretically the transient autoignition processes of the droplets in nonconvective, nondilute, monodisperse clouds, including the evaporation of the droplet and the buildup of the fuel vapor concentration in the droplet vicinity from an initial state of concentration. Three different ignition modes are identified: local, global, and homogeneous ignition. Although the chemical reaction is confined to a narrow region in local ignition, it prevails in the interdrop space in global ignition due to the presence of significant fuel vapor. Homogeneous ignition, occurring after the droplets have vaporized completely, appears when initial droplet diameters are relatively small. Local ignition is favored when preexisting fuel vapor concentrations are low, initial droplet diameters are large, and ambient gas temperatures are high. The effects of droplet diameter, preexisting fuel vapor concentration, and ambient gas temperature on ignition modes and ignition delay times are examined. The different ignition modes correspond to the various flame propagation modes in sprays reported in previous experimental observations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
