Optical Properties of Soot in the Overfire Region of Large Buoyant Turbulent Diffusion Flames.
Optical Properties of Soot in the Overfire Region of
Large Buoyant Turbulent Diffusion Flames.
Krishnan, S. S.; Lin, K. C.; Faeth, G. M.
NISTIR 6242; October 1998.
National Institute of Standards and Technology. Annual
Conference on Fire Research: Book of Abstracts.
November 2-5, 1998, Gaithersburg, MD, Beall, K. A.,
Editor(s), 29-30 pp, 1998.
Available from: National Technical Information Service
Order number: PB99-102519
fire research; fire science; fire suppression; soot;
turbulent flames; diffusion flames; optical properties
Information about the optical properties of soot is
needed in order to develop optical measurements of soot
properties and to compute soot radiation in flame
environments. Unfortunately, current estimates of soot
optical properties involve excessive uncertainties due
to uncertainties about soot refractive indices. Wu et
al sought to correct this deficiency by measuring the
refractive index properties of soot in the overfire
region of large gaseous hydrocarbon fueled buoyant
turbulent diffusion flames burning in still air where
soot properties depend on the fuel but are independent
of position and flame residence time by exploiting the
properties of Rayleigh-Debye-Gans scattering theory for
polydisperse fractal aggregates (denoted RDG-PFA theory)
which has been recently shown to be effective for soot
optical properties. Thus, the present study sought to
resolve this issue by completing similar measurements of
soot optical properties, again considering soot in the
overfire region of large buoyant turbulent flames but
for a broader range of both gas and liquid hydrocarbon
fuels burning in still air.