Creeping Flame Spread Along Fuel Cylinders in Forced and Natural Flows and Microgravity.
Creeping Flame Spread Along Fuel Cylinders in Forced and
Natural Flows and Microgravity.
Delichatsios, M. A.; Altenkirch, R. A.; Bundy, M.;
Bhattacharjee, S.; Tang, L.; Sacksteder, K.
Combustion Institute, Symposium (International) on
Combustion, 28th. Proceedings. Volume 2. July
20-August 4, 2000, Edinburgh, Scotland, Combustion
Institute, Pittsburgh, PA, Candel, S.; Driscoll, J. F.;
Burgess, A. R.; Gore, J. P., Editor(s)(s), 2835-2842 pp,
combustion; flame spread; microgravity; geometry; heat
conduction; natural convection
Semianalytical expressions are developed for creeping
flame spread parallel to a fuel cylinder axis so that
spread rates measured or predicted for flat surfaces
over the same material can be directly used for
cylindrical surfaces. Two phenomena are identified that
cause an increased flame spread rate in the cylindrical
over the flat surface geometry: i) increased heat
transfer from the gas phase and ii) faster temperature
increase of the solid phase. Results compare favorably
with numerical solutions for cylindrical spread in
forced and natural flows and microgravity and with
experiments on downward flame spread on cylindrical rods
in normal gravity and microgravity.