Investigation of Velocity Boundary Conditions in Counterflow Flames.
Investigation of Velocity Boundary Conditions in
Park, W. C.; Hamins, A.
KSME International Journal, Vol. 16, No. 2, 262-269,
counterflow flames; combustion models; methodology;
The effects of velocity boundary conditions on the
structure of methane-air nonpremixed counterflow flames
were investigated by two-dimensional numerical
simulation. Two low global strain rates, 12 s-1 and 20
s-1, were considered for comparison with measurements.
Buoyancy was confirmed to have strong effects on the
flame structure at a low global strain rate. It was
shown that the location where a top hat velocity profile
was imposed is sensitive to the flame structure, and
that the computed temperature along the centerline grees
well with the measurements when plug flow was imposed at
the inner surface of the screen nearest the duct exit.