USING MODIFIED CONE CALORIMETER TO DETERMINE HEAT/MOISTURE TRANSPORT PROPERTIES AND PYROLYSIS/COMBUSTION PROPERTIES OF WOOD-BASED MATERIALS FOR USE IN CFD MODELS

摘要

The trend towards performance-based codes for achieving acceptable fire safety creates asignificant demand for improved material properties and computer fire models. The performance-basedengineering analysis is very difficult to achieve for wood-based materials because of their complexphysical processes for pyrolysis and combustion. To address this need the cone calorimeter (ASTME1354) was modified to be the primary test method for deriving properties of (1) heat/moisture transport,(2) mechanistic kinetics of pyrolysis, (3) surface ignition and creeping flame spread, and (4) combustionemission characteristics for the tested material. Each of these four major properties required a uniquesample holder for revealing the targeted properties, with a corresponding mathematical analysis. Withthese four separate tests, using samples cut out from the same block of wood, the algorithms for drying,ignition, flame spread, pyrolysis and combustion can be incorporated into Computational Fluid Dynamicscodes (CFDs) to predict larger scale behavior for the particular material.