Predicting the Burning of Wood Using an Integral Model.
Predicting the Burning of Wood Using an Integral Model.
(1412 K)
Spearpoint, M. J.; Quintiere, J. G.
Combustion and Flame, Vol. 123, No. 3, 308-325,
November 2000.
Sponsor:
National Institute of Standards and Technology,
Gaithersburg, MD
Keywords:
wood; heat flux; mass loss; temperature; char;
pyrolysis; charring; burning rate; surface temperature;
penetration; ignition; experiments; equations;
temperature profiles; material properties; oxidation;
char depth
Abstract:
This paper experimentally and theoretically examines the
horizontal burning of four species of wood exposed to
incident heat fluxes of 25-75 kW/m2 with their grain
oriented either parallel or perpendicular to the
incident heat flux. Mass loss, temperatures, and char
fractions were measured. A one-dimensional integral
model that describes the transient pyrolysis of a
semi-infinite charring solid subject to a constant
radiant heat flux was developed. The solutions to the
integral model for the burning rate were compared with
data using analytical short-time and long-time
solutions. Reasonable comparative results are shown for
mass loss rate, surface temperature, char depth, and
effective thermal penetration.
