小型模型室を用いた火災実験におけるフラッシュオーバー以前の挙動

抄録

The behavior of the pre-flashover period in compartment fire was investigated experimentally using the small scale compartment. In the PMMA compartment fires, the flame spread depended only on the ventilation opening height and did not depend on its width. The flame spread rate was fairly high in compared with the free burning condition (without compartment). After the whole PMMA surface was covered by a flame, an oscillatory phenomenon appeared. This oscillatory phenomenon was modelled qualitatively in terms of the competitive relationship between fuel gas release rate and fresh air supply rate by ventilation. Also the scale effect of fire behavior in the early stages of the methanol compartment fires was explained using this model.