Suppression of Low Strain Rate Flames by an Agent.
Suppression of Low Strain Rate Flames by an Agent.
(884 K)
Hamins, A.; Bundy, M.; Puri, I. K.
NISTIR 6588; November 2000.
U.S./Japan Government Cooperative Program on Natural
Resources (UJNR). Fire Research and Safety. 15th Joint
Panel Meeting. Volume 1. Proceedings. March 1-7, 2000,
San Antonio, TX, Bryner, S. L., Editor(s), 250-257 pp,
2000.
Order number: PB2001-101517
Keywords:
fire safety; fire research; fire suppression; halons;
flame extinction
Abstract:
The structure and suppression of low strain rate
methane-air nonpremixed flames were investigated
experimentally and computationally. Measurements of the
critical suppression conditions were conducted using N2,
CO2, and CF3Br added to the fuel or oxidizer streams.
Temperature measurements were made with small platinum
thermocouples (0.025 mm wire diameter) that were coated
with a fine layer (0.010 mm) of SiO2 and corrected for
radiative losses. Numerical simulations of the
non-luminous diluted flames included radiative heat
losses by participating gaseous species. A previously
developed narrowband model of radiative transfer was
incorporated into the one-dimensional flame simulation.
For comparison, radiation was also modeled as an
optically thin gray gas, represented by Plank mean
absorption coefficients.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899