A Physically-Based Model for Urban Fire Spread
A Physically-Based Model for Urban Fire Spread
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DOI：
10.3801/iafss.fss.7-129
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
K. Himoto;Takeyoshi Tanaka
中科院分区：
文献类型：
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作者：
K. Himoto;Takeyoshi Tanaka
试图建立一个基于物理的模型来模拟城市火灾的蔓延。在该模型中，城市火灾被视为多个建筑火灾的集合。该模型包括两个子模型，即预测其他建筑火灾采暖下建筑火灾行为的模型和预测建筑火灾引起的热环境的模型。该建筑火灾模型基于单区域方法，将控制体应用于建筑物内的隔间。当外部供暖，无论是来自同一建筑物还是来自其他建筑物，超过临界热流密度时，隔间内的火灾负荷点燃并燃烧。在热环境模型中，考虑了热辐射和火灾诱导烟羽作为建筑物间火灾蔓延的影响因素。该模型应用于一个虚构的城市区域，其中49个多房间建筑以简单的配置排列。
An attempt is made to develop a physically-based model for simulating urban fire spread. In the model, urban fire is regarded as an ensemble of multiple building fires. The model consists of two sub-models, i.e. the model to predict the building fire behavior under the exposure of heating from other building fires and the model to predict the thermal environment caused by building fires. The building fire model is based on single zone method, applying control volumes to compartments in a building. When the external heating, whether it is from the same building or from other buildings, exceeds the critical heat flux, the fire load in the compartment ignites and burns. For the thermal environment model, thermal radiation and fire-induced plume are considered as the factors of building-to-building fire spread. The model is applied to a fictitious urban district where 49 multi-room buildings are arrayed in a simple configuration.