From Single Droplet to Practical Spray Combustion: Fundamental Studies in Between

Tuesday, September 28, 1999 - 2:00pm - 3:00pm
Keller 3-180
Alessandro Gomez (Yale University)
Practical spray combustion systems are some of the most challenging environments to examine and do not lend themselves to well-controlled studies from which to extract the effects of individual variables. At the other end of the spectrum of liquid fuel combustion systems are the classic experiments on single droplet burning, some of which will be reviewed in other presentations in this workshop. They can be conducted under well-defined and well-controlled conditions, but their relevance to practical spray systems is limited, because the majority of droplets burn as a group and interact with one another in practical environments. Configurations that are intermediate in complexity between these two extremes include: laminar spray flames, such as counterflow and coflow laminar spray diffusion flames; counterflow spray flames interacting with a toroidal vortex; and turbulent spray flames in which the liquid undergoes a gentle atomization while turbulence is independently synthesized in the free stream. Key findings of our group in some of these configurations will be discussed in the presentation.