A study on next generation zone smoke transport model and basis of practical usage

本研究的目的是针对人员疏散和消防员的活动，改进建筑物内火灾和烟雾蔓延的预测方法。为了包含多种火灾和烟雾现象，进行了水平天花板排气口内烟气运动的模型缩尺实验。给出了双向流动的起始条件。在双向流区，给出了空气和烟尘质量流量的经验公式。为了模拟房间内可燃物的燃烧行为，在靠近墙壁表面的地方焚烧聚亚安酯块，在那里它们从墙壁接收热反馈。针对视线受阻和地板亮度降低的问题，对烟雾颗粒的光散射行为进行了测量和描述。在改进区域模型的同时，正在实施这些新开发的子模型，以便预测可以更接近实际。

This study aims at improvement of the prediction methods of fire and smoke spread in buildings in connection with evacuation of occupants and activity of fire-fighters. To include wide range of fire and smoke phenomena, model scale experiments were carried out on smoke movement through horizontal ceiling vent. The onset condition of bi-directional flow was formulated. In the bi-directional regime, experimental formula was proposed for mass flow rates of air and smoke. To simulate the burning behavior of combustibles in a room, polyurethane block was burnt adjacent to wall surfaces, where they receive thermal feedback from walls. As to the sight blockage and decrease of floor luminance, the behavior of light scattering by smoke particles were measured and formulated. While the zone model is being improved, these newly developed sub-models are being implemented so that the prediction could be more realistic.