Ignition of a Droplet Cloud in a Vortex
This work is part of a collaboration with Dr. G. Continillo
of Istituto di Ricerche sulla Combustione - Consiglio Nazionale delle
Ricerche , Naples, Italy
This work presents an analytical study of the vaporization and ignition of a droplet ring
and a droplet cloud of fuel immersed in the field of a circular vortex. The model
considers the motion of the ring or cloud as induced by the vortical motion of the gas.
The vaporization and in particular the transient variation of the gas-phase fuel mass
fraction at the center of the vortex is obtained by means of the Green's function approach.
The ignition phenomenon, which occurs at the vortex center, is treated by large-activation-energy
The equation governing the perturbation temperature and thus the ignition is affected by three
parameters: a Damkohler number and two dimensionless numbers resulting from the vaporization
of the fuel. Results showing the influence of these three parameters are presented, indicating the
conditions under which ignition can occur.
R. H. Rangel and G. Continillo,
"Theory of Vaporization and Ignition of
a Droplet Cloud in the Field of a Vortex,"
Twenty Fourth Symposium (International) on Combustion.
The Combustion Institute, 1493-1501, 1992.
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