- Author
-
Danbara, T.
|
Saito, N.
- Title
- Effect of Inert Gas and Water Vapor on Flame Spread Over Paper.
- Journal
-
Report of National Research Institute of Fire and Disaster,
No. 86,
28-34,
September 1998
- Keywords
-
paper
|
inert gases
|
water vapor
|
flame spread
- Abstract
- ONLY ABSTRACT IN ENGLISH To investigate suppression efficiency of inert gases (N₂, Ar, CO₂, IG-541 (a mixed agent of 52 N₂, 40% Ar, and 8% CO₂) and water vapor for burning of cellulose materials, downward flame spread rates and flame extinguishing concentrations over surface of filter paper were measured by a coflow type burner apparatus. An observed flame extinguishing concentration of IG541 agreed with a calculated value by the additive-property equation about the suppression efficiency for inert gas mixtures reported by Saito et al using the flame extinguishing concentrations of N₂, Ar, and CO₂. The fact suggests that each component of the mixed agent suppresses the flame independently and the suppression effect of the inert gases thermal origin for the flame spread over the filter paper. About the suppression efficiency of water vapor on the filter paper flaming, the effect vaporization heat of water adsorbed into the paper is three times larger than the heat capacity effect water vapor in the air stream.