纵向通风公路隧道火灾拱顶烟气最高温度试验研究  

Maximum Temperature of Smoke near Vault in Road Tunnel Fires with Longitudinal Ventilation

作　　者：易亮[1] 杨洋[1] 徐志胜[1] 吴德兴 李伟平 

机构地区：[1]中南大学防灾科学与安全技术研究所,长沙410075 [2]浙江省交通规划设计研究院,杭州310006

出　　处：《燃烧科学与技术》2011年第2期109-114,共6页Journal of Combustion Science and Technology

基　　金：浙江省科技计划资助项目(2008C13041-2);中南大学自由探索计划资助项目(201011200070)

摘　　要：采用缩尺寸模型试验方法,对不同坡度隧道火灾时拱顶附近烟气最高温度与通风风速、火源功率之间的关系进行了研究.试验结果表明,坡度对隧道火灾纵向通风时拱顶附近烟气温度有较大影响,以纵向通风方向为参考方向,随着隧道坡度的增加,拱顶附近烟气温度呈下降趋势.对比分析水平隧道纵向通风下拱顶最高烟气温度的Kurioka模型,引入坡度修正系数,建立了修正后的拱顶烟气最高温度预测模型,可用于有坡度隧道火灾纵向通风时拱顶烟气最高温度预测.Maximum temperature of smoke near vault in tunnel fires with longitudinal ventilation was studied by re-duced-scale experiments.Relationship between temperature of smoke near vault and longitudinal velocity,heat re-lease rate of fire and slope of tunnel was also discussed.The results show that slope of tunnel has significant influence on maximum temperature of smoke near vault.Along with the increase of slope of tunnel,temperature of smoke near vault decreases.By comparing the test results of maximum temperature of smoke with the predicted values by Kurioka model,a modified correlation is proposed by adding a corrected factor.The formula is recommended for the authority to use as a tool in evaluating the temperature of smoke near vault in tunnel fires.

关 键 词：隧道火灾 烟气温度 缩尺寸试验 坡度 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]