Soot Kinetics/Radiation Interactions in Methane/Air Diffusion Flames.
Soot Kinetics/Radiation Interactions in Methane/Air
Sivathanu, Y. R.; Gore, J. P.
NISTIR 5499; September 1994.
National Institute of Standards and Technology. Annual
Conference on Fire Research: Book of Abstracts.
October 17-20, 1994, Gaithersburg, MD, 125-126 pp, 1994.
Sponsor:National Institute of Standards and Technology,
Available from: National Technical Information Service
Order number: PB95-104964
fire research; diffusion flames; soot; kinetics;
methane; radiative heat transfer
Radiation heat transfer from flames depends on the
instantaneous soot volume fractions and temperatures.
The major obstacle to obtaining accurate soot volume
fraction predictions in flames is the strong coupling
between the finite rate kinetics of soot processes and
radiation. Detailed models of soot kinetics cannot be
incorporated in turbulent flame studies due to the
limitations of computer resources. Therefore, many
studies have concentrated on simplified global kinetics
models incorporating soot nucleation, growth and
oxidation mechanisms. The local temperatures needed for
the soot kinetics calculations were obtained using
simplified global radiation models. However, in
strongly radiating flames it has been shown that the
radiation and soot kinetics calculations need to be
coupled to accurately predict observed soot volume
fractions. The degree of this coupling in weakly
radiating flames, where radiation is predominantly from
gas species molecules rather than soot, has not been
studied. The objective of the present work is evaluate
this coupling of radiation and soot kinetics in weakly
radiating flames by using the simplified soot kinetics
model of Ref. 4 along with a narrow-band radiation