火源及通风对地下综合管廊火灾的影响

利用PyroSim软件建立一段L型综合管廊模型并进行火灾数值模拟，并运用Origin软件对温度进行分析，研究了火源特性（火源位置和火源功率）及通风条件（风速和风向）对管廊烟气蔓延及温度变化的影响。结果表明，当火源位于管廊中部且功率大时，高温且有毒烟气能够在更短的时间内充满整个管廊，火灾危险性大；风速过大会造成大量的烟气在拐角处积聚，排烟的效果不与风速成正比。

Influence of fire source and ventilation on underground pipe gallery fire

A section of L shape pipe gallery model was established using PyroSim software and fire numerical simulation was carried out.The temperature was analyzed using Origin software.The influence of fire source characteristics(location and power of fire source)and ventilation conditions(wind speed and direction)on smoke spread and temperature change in pipe gallery was studied.The results showed that when the fire source is located in the middle of the corridor and the power is high,high temperature and toxic fumes can fill the entire pipe gallery in a shorter time,the fire risk is higher.Excessive wind speed causes a large amount of smoke to accumulate at the corner,so the smoke exhaust effect is not directly proportional to the wind speed.