Abstract Since Engineered Wood Products (EWPs) have entered the building industry as structural elements, several fire safety concerns have arisen, especially for high-rise structures. The combustible nature of timber suggests that the current models and correlations for compartment fire dynamics might not apply to compartments with timber boundaries, due to the increased fuel load and its redistribution across the compartment. In order to fill this knowledge gap, 24 medium-scale timber compartments have been carried out to characterise the fire dynamics when timber members are present. This experimental campaign provides data about the gas-phase temperatures, the flow fields at the opening, the burning behaviour of timber and its contribution to the total heat release rate. This data is then compared to Thomas and Heselden (1972) [1] compartment fire framework that predicts the fire development in conventional compartments. This comparison highlights the limitations of this framework, and the subsequent analysis proposes several changes to include the effect of burning timber elements. It is concluded that gas flow velocities increase with the amount of timber present in the compartment. Therefore, the fire transitions to a new regime where the gases do not have enough time to mix and react inside the compartment, the temperatures decrease and the horizontal velocities at the opening increase.

中文翻译：

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大量木材隔间的火灾动力学

摘要 自从工程木制品 (EWP) 作为结构元素进入建筑行业以来，出现了一些消防安全问题，尤其是高层结构。木材的可燃性质表明，由于燃料负荷增加及其在整个隔间的重新分布，当前的隔间火灾动力学模型和相关性可能不适用于具有木材边界的隔间。为了填补这一知识空白，已经进行了 24 个中等规模的木隔间来表征存在木构件时的火灾动态。该实验活动提供了有关气相温度、开口处的流场、木材的燃烧行为及其对总热释放率的贡献的数据。然后将该数据与 Thomas 和 Heselden (1972) [1] 隔间火灾框架进行比较，该框架预测传统隔间中的火灾发展。这种比较突出了这个框架的局限性，随后的分析提出了一些变化，包括燃烧木材元素的影响。得出的结论是，气体流速随着隔室中木材数量的增加而增加。因此，火灾过渡到一个新的状态，气体没有足够的时间在隔间内混合和反应，温度降低，开口处的水平速度增加。随后的分析提出了一些变化，包括燃烧木材元素的影响。得出的结论是，气流速度随着隔间中木材的数量而增加。因此，火灾过渡到一个新的状态，气体没有足够的时间在隔间内混合和反应，温度降低，开口处的水平速度增加。随后的分析提出了一些变化，包括燃烧木材元素的影响。得出的结论是，气体流速随着隔室中木材数量的增加而增加。因此，火灾过渡到一个新的状态，气体没有足够的时间在隔间内混合和反应，温度降低，开口处的水平速度增加。