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Please use this identifier to cite or link to this item: http://archive.rubicon-foundation.org/4600

Title: The Combustibility of Materials in Oxygen-Helium and Oxygen-Nitrogen Atmospheres
Authors: Huggett, C
Von Elbe, G
Haggerty, W
Keywords: FIRE SAFETY
COMBUSTION
Hypobaric Chamber
THERMAL PROPERTIES
HAZARDS
PAINTS
WOOD
IGNITION
PAPER
CELLULOSE ACETATES
FOAM
COTTON TEXTILES
FIRE PREVENTION
Issue Date: 1968
Publisher: ATLANTIC RESEARCH CORP ALEXANDRIA VA ADVANCED TECHNOLOGY DIV
Citation: AD0489728
Abstract: The energy required for ignition of various materials and the rate at which flames spread over the surface after ignition were determined in oxygen- nitrogen and oxygen-helium mixtures in order to assess the fire hazards associated with proposed space cabin atmospheres. It was found that flames spread more rapidly in oxygen-helium mixtures than in comparable oxygen-nitrogen mixtures. The experimental data correlated well with the specific heats of the gas mixtures per mole of oxygen, indicating that the flame temperature is the dominant factor in determining flame spread rates. A theoretical model of flame spread was developed. Slightly more energy was required to ignite materials in oxygen-helium than in oxygen-nitrogen mixtures. However, the difference was small enough so as not to reduce significantly the fire hazards, especially since the flames spread more rapidly once the material was ignited. It was concluded that fire hazards are greater in oxygen-helium atmospheres than in oxygen-nitrogen atmospheres.
Description: Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested.
Gov't Doc # : AD0489728
SAM-TR-66-85
AF 41(609)-2478
URI: http://archive.rubicon-foundation.org/4600
Appears in Collections:USAF Technical Reports (USAF-SAM and Brooks AFB)

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