不同通风模式下隧道酒精池火热传递过程

发布时间：2018-05-07 20:52

本文选题：池火 + 顶部排烟　；参考：《东北大学学报(自然科学版)》2017年10期

【摘要】：为分析不同通风模式对于池火热传递过程的影响,在隧道模型内进行直径0.5 m酒精池火实验,测试和对比燃料质量损失速率、火场温度、火焰辐射热和对流换热热通量.结果表明:在0.5 m/s纵向排烟模式下,旺盛阶段连续火焰区火焰辐射热通量比自然通风条件增加了30%左右,这对火灾热传递过程控制不利.在0.8,1 m/s纵向排烟条件下,旺盛阶段连续火焰区火焰辐射热通量及上部热烟气层温度显著降低.0.5 m/s顶部排烟显著降低了旺盛阶段连续火焰区火焰辐射热通量,火灾最晚达到旺盛阶段,较早进入衰减阶段.0.5 m/s顶部排烟是本实验条件下最佳的排烟模式.
[Abstract]:In order to analyze the influence of different ventilation modes on the heat transfer process of the tank, the experiment of 0.5 m diameter alcohol pool fire was carried out in the tunnel model, and the fuel mass loss rate, fire temperature, flame radiation heat and convection heat flux were measured and compared. The results show that under the 0.5 m / s longitudinal exhaust mode, the flame radiation heat flux in the continuous flame region in the exuberant stage is increased by about 30% compared with the natural ventilation condition, which is unfavorable to the control of the fire heat transfer process. Under the condition of 0.8 m / s longitudinal smoke exhaust, the flame radiation heat flux in the continuous flame region and the temperature of the upper hot flue gas layer in the continuous flame region in the exuberant stage were significantly decreased by .0.5 m / s top smoke emission, and the flame radiation heat flux in the continuous flame zone in the vigorous stage was significantly decreased. The fire reached the exuberant stage at the latest and reached the attenuation stage earlier. 0.5 m / s top smoke exhaust was the best smoke exhaust mode under the experimental conditions.
【作者单位】：东北大学资源与土木工程学院;沈阳城市建设学院市政与环境工程系;
【基金】：国家“十二五”科技支撑计划项目(2015BAK16B01) 国家自然科学基金资助项目(51374050)
【分类号】：U458

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