垂直可燃面上の非定常火炎伝播性状

概要

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A theoretical solution of unsteady-state flame spreading velocity along a vertical combustible solid is derived on the basis of previous experimental relations on the heat transfer from the flame to the surface. From the comparison of this with the steady-state solution, it was found that spontaneous flame spreading velocity under arbitorary conditions falls within relatively narrow range. Measurements of flame spread along vertical PMMA slabs with and without external radiation were made to verify the solution, which have revealed considerable acceleration of flame spread due to external radiation. Application of the theory to the evaluation of this influence has resulted in 20-40 % overestimate of flame spreading velocity. This error is attributed to the higher pyrolysis temperature in the experiments, especially in those with external radiation, than in the calculation and the overestimate of heat release rate in the calculation in which the dripping of melted fuel is not considered.
社団法人日本建築学会の論文
1990-08-30