Predicting the Ignition and Burning Rate of Wood in the Cone Calorimeter Using an Integral Model.
Predicting the Ignition and Burning Rate of Wood in the
Cone Calorimeter Using an Integral Model.
Spearpoint, M. J.
NIST GCR 99-775; 425 p. May 1999.
Sponsor:National Institute of Standards and Technology,
Available from: National Technical Information Service
(NTIS), Technology Administration, U.S. Department of
Commerce, Springfield, VA 22161.
1-800-553-6847 or 703-605-6000;
Order number: PB99-150229
cone calorimeters; wood; ignition; burning rate; radiant
flux; thermophysical properties; material properties;
experiments; char depth
This study compares ignition and burning rate
measurements of wood in the Cone Calorimeter with a
one-dimensional integral model that describes the
transient pyrolysis of a semi-infinite charring solid
subject to a constant radiant heat flux. Four species of
wood were exposed to a range of incident heat fluxes
both with their gram parallel and perpendicular to the
incident heat flux. The time to ignition and burning
rate measurements obtained from the Cone Calorimeter
were used to derive characteristic properties of the
materials. These properties were used as input to the
integral model to compare its predictions with the
experimental data. Thermocouples were embedded as
various depths in the samples. Temperature measurements
were used to determine the progress of the thermal
penetration wave and char depth through the material.
The measurements were compared to predictions from the