狭い空間における薄い紙の燃え拡がり現象

抄録

Near-limit characteristics of flame spread are of importance from the fire-safety point of view. This paper presents results of opposed-flow flame-spread experiments in a narrow channel. With an increase in the opposed-flow velocity, the spread velocity first increases and then slightly decreases. Flame spread was not possible when the opposed-flow velocity was less than the lower limit or greater than the upper limit. A steady, 1-D heat equation was derived, and the values of its heat-release and heat-loss terms were inversely determined from experimentally measured temperature distributions. The ratio of the total heat release rate to the value of complete combustion was then calculated. It was found that the ratio generally increases with an increase in the opposed-flow velocity. The ratio had a non-zero value, around 20%, even at the lower limit.