封堵条件下管廊温度场与烟气流动规律研究

Research on temperature field and smoke flow law of pipe gallery under plugging condition

为了研究封堵结构因子对城市地下综合管廊火灾温度场分布及烟气流动规律的影响,建立1∶1全尺寸城市地下综合管廊模型,开展不同封堵条件下的管廊油池火数值模拟。结果表明:随着端口封堵结构因子的增大,管廊顶棚温度升高,顶棚温度呈线性趋势增加,管廊壁面温度变化区域范围相比廊道空间的温度变化区域较大;烟气层高度随着端口封堵结构因子的增大而逐渐降低,无量纲烟气层高度呈线性减小趋势。

In order to study the effect of plugging structure factors on the fire temperature field distribution and smoke flow law of urban underground integrated pipe corridor fire,a 1∶1 full-size urban underground integrated pipe gallery model is established to carry out numerical simulation of oil pool fire in pipe corridor under different blocking conditions.The results show that with the increase of the port blocking structure factor,the higher the temperature of the roof of the corridor,and the ceiling temperature increases in a linear trend.And the range of the temperature variation region of the corridor wall is larger compared to the temperature variation region of the corridor space;the height of the flue gas layer gradually decreases with the increase of the port plugging structure factor,the height of the dimensionless flue gas layer decreases linearly.