Soot Oxidation and Agglomeration Modeling in a Microgravity Diffusion Flame.
Soot Oxidation and Agglomeration Modeling in a
Microgravity Diffusion Flame.
(1674 K)
Ezekoye, O. A.; Zhang, Z.
Combustion and Flame, Vol. 110, No. 1/2, 127-139, 1997.
Sponsor:
National Institute of Standards and Technology,
Gaithersburg, MD
Keywords:
soot; oxidation; microgravity; diffusion flames;
formulations; reaction kinetics; equations
Abstract:
The global evolution of a microgravity diffusion flame
is detailed. Gas species evolution is computed using a
reduced finite rate chemical mechanism. Soot evolution
is computed using various combinations of existing soot
mechanisms. Radiative transfer is coupled to the soot
and gas phase chemistry processes using a P1 spherical
harmonics radiation model. The soot agglomeration model
was examined to note the dependence of soot growth and
oxidation processes on soot surface area predictions.
For limiting cases where agglomeration was excluded from
the soot evolution model, soot primary particle sizes
and number concentraions were calculated, and the number
of primary particles per aggregate was inferred. These
computations are compared with experimental results for
microgravity and nonbuoyant flame conditions.
