城市隧道火灾烟气最高温升特性的全尺寸试验研究  

Full Scale Tests on the Maximum Smoke Temperature Rise in an Urban Tunnel

作　　者：蒋亚强[1] 李乐[1] 廖曙江[2] 阳东[3] 

机构地区：[1]公安部四川消防研究所,成都610036 [2]重庆市公安消防总队,重庆401121 [3]重庆大学城市建设与环境工程学院,重庆400044

出　　处：《工程热物理学报》2015年第10期2287-2292,共6页Journal of Engineering Thermophysics

基　　金：公安部消防局科研计划项目(No.2014XFCX16);重庆市科委应用开发计划项目(No.cstc2013yykfA00001);国家自然科学基金项目(No.51106189);公安部重点研究计划项目(No.201202ZDYJ023);公安部四川消防研究所基本科研业务费专项(No.20148824Z)

摘　　要：通过在城市隧道中开展全尺寸火灾试验,研究了隧道顶棚射流烟气最高温升沿纵向的衰减规律,并对现有的火源区顶棚下方最高温升预测模型进行了验证。结果表明,隧道坡度对烟气最高温升的纵向衰减趋势有重要影响,沿上坡方向衰减较慢,而沿下坡方向衰减更快。通过试验数据进行非线性拟合,获得了类似于Alpert模型的最高温升幂函数衰减模型。对于火源区顶棚下方的最高温升,Li模型与试验测量值之间的误差更小,其预测精度比Kurioka模型更高。This work investigated the longitudinal decaying behavior of maximum smoke temperature rises in an urban tunnel by conducting 5 full scale fire tests.It also verified the prediction accuracy for existing models on the maximum gas temperatures beneath the ceiling in the fire region.Results showed that tunnel grade demonstrated significant influence on the longitudinal decaying behavior,i.e.temperatures decayed faster in the down-grade direction than in the up-grade direction.Longitudinal decaying models were established by non-linear regression analysis based on the Alpert model.It was also found that,for the maximum gas temperatures in the fire region,discrepancy between the Li model predictions and the measured values was relatively small,which indicated higher accuracy than the Kurioka model.

关 键 词：城市隧道 火灾烟气 最高温升 全尺寸试验 

分 类 号：TK121[动力工程及工程热物理—工程热物理] X932[动力工程及工程热物理—热能工程]