熱のフィードバック効果を考慮した延焼拡大モデル

抄録

A model based on a two-layer zone model is proposed for the prediction of fire spread between combustible items in a compartment. Smoke layer temperature and height are calculated by the conservation of energy in the compartment. The effects of thermal feedback from flames, smoke layer and compartment surfaces are taken into account by radiation network. Calculation results of the heat release rate, smoke layer temperature, heat flux, and time to spread between combustible items were compared with those of model experiments carried out previously. As to the time to fire spread during the initial stage could be predicted fairly well. As the smoke layer temperature increases, this model seems to overestimate radiation feedback to fuel surfaces; this in turn estimate the shorter time to fire spread than that in the experiments.