Analysis of the ISO 9705 Room/Corner Test: Simulations, Correlations and Heat Flux Measurements.
Analysis of the ISO 9705 Room/Corner Test: Simulations,
Correlations and Heat Flux Measurements.
Dillon, S. E.
NIST GCR 98-756; 216 p. August 1998.
Sponsor:National Institute of Standards and Technology,
Available from: National Technical Information Service
Order number: PB98-172422
corner tests; heat flux; fire data; fire growth; fire
models; gas burners; material properties
A simulation model is implemented in order to predict
the fire performance of materials in the ISO 9705
Room-Corner Test. These materials were tested by the L
S Fire Laboratories of Italy, and the data they provided
is analyzed in this report. A method was established to
define material properties including the heat of
combustion, heat of gasification, thermal inertia,
ignition temperature and the total energy relesed per
unit area. These methods were developed from
refinements in a theoretical model of ignition and in
resolving time dependent effects in the Cone
Calorimeter. The materials examined consist of some of
the most difficult to analyze because they melt, drip,
expand and de-laminate from the wall and ceiling
configuration of the room-corner test. Corrections have
been included in the simulation modeling to account for
these effects. The correction involves reducing the
total energy content per unit area of the material to
accordingly reduce its contributions as a wall-ceiling
oriented element. An empirical correlation based on a
linearized upward flame spread model is shown to provide
excellent comparison to the flashover time in the
full-scale ISO test. Accurate heat flux measurements
from the ignition burner at an energy release of 100 and
300 kW were made from full-scale room-corner tests.
Corrections to these heat flux measurements provide the
incident heat flux from the burner fire plume and from a
combination of the plume and the thermal feedback of the
heated room. Detailed heat flux distributions along the
walls and ceiling in the vicinity of the ignition burner