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Flow of nitrogen-pressurized Halon 1301 in fire extinguishing systemsHalon 1301 which is a halocarbon fire extinguishing agent (CBrF3) used by the U.S. Army for vehicle fire suppression is discussed. Halon 1301 is discharged under nitrogen pressure, and the Halon-nitrogen mixture is a two phase, two component mixture that obeys compressible fluid laws and exhibits choking effects. A computer model was developed to analyze the discharge of Halon and nitrogen from a storage bottle through pipes and nozzles. The model agrees well with data from Halon 1301 discharge tests. The discharge time depends mainly on nozzle area and pipe volume, for given initial conditions. Graphs were developed for estimating discharge times. A nozzle employing multiple concentric converging/diverging nozzles was developed which gave hemispherical coverage.
Document ID
19850007392
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Elliott, D. G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Garrison, P. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Klein, G. A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Moran, K. M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Zydowicz, M. P. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 5, 2013
Publication Date
November 1, 1984
Subject Category
Air Transportation And Safety
Report/Patent Number
NASA-CR-174271
JPL-PUBL-84-62
NAS 1.26:174271
Accession Number
85N15701
Funding Number(s)
CONTRACT_GRANT: NAS7-918
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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