Pipe Flow Characteristics of Alternative Agent/Nitrogen Mixtures.
Pipe Flow Characteristics of Alternative Agent/Nitrogen
Cleary, T. G.; King, M. D.; Yang, J. C.; Grosshandler,
NISTIR 5499; September 1994.
National Institute of Standards and Technology. Annual
Conference on Fire Research: Book of Abstracts.
October 17-20, 1994, Gaithersburg, MD, 11-12 pp, 1994.
Order number: PB95-104964
fire research; pipes; nitrogen; nacelle fires; halons;
fire suppression; fire extinguishing agents
The evaluation of alternative agents for application in
engine nacelle fire protection includes delivery
efficiency of agent from a remote storge bottle through
piping to the nacelle injection loacation. Present
military requirements for halon systems specify a
maximum discharge time from the remote bottle to the
injection location of 1 second. A similar performance
criterion for the replacement agent delivery will more
than likely be required. The applicability of
retro-fitting existing systems or optimal design of new
systems necessitates a thorough understanding of the
two-phase flow in piping. As part of the halon
replacement project, an experimental pipe flow apparatus
was constructed and is being used to examine alternative
agent flow in various horizontal piping configurations
and conditions. The selected agents for engine nacelle
fire protection are CF3I, HFC-227ea, and HFC-125. Halon
1301 is included in this study in order to establish a
reference for comparison.