摘要
为了研究不同坡度竖井隧道,采用FDS对不同坡度(3%~20%)作用下竖井内部温度衰减、烟气逆流长度以及竖井自然排烟效率进行分析。采用无量纲参数,对隧道内部温度变化进行研究,结果表明:坡度的增加能抑制竖井吸穿现象的产生;坡度会使火焰角度发生倾斜导致温度最高点出现变化,同时也能降低隧道内部温度,烟气逆流长度受坡度变化影响大,根据研究结果建立温度衰减预测模型与烟气逆流模型,为隧道、巷道提供设计依据。
In order to study the shaft tunnel with different slope,FDS is used to analyze the internal temperature at tenuation,back-layering length and natural smoke exhaust efficiency of shaft under different slopes(3%~20%)are analyzed.The results show that the increase of slope can inhibit the phenomenon of shaft plug-holing.The slope will tilt the flame angle,resulting in the change of the highest temperature point,and also reduce the internal temperature of the tunnel.The flue gas countercurrent length is greatly affected by the slope change.According to the research re sults,the temperature attenuation prediction model and flue gas countercurrent model are established to provide design basis for tunnel and roadway.
作者
刘倩
许秦坤
LIU Qian;XU Qinkun(College of Environment and Resources,Southwest University of Science and Technology,Mianyang Sichuan 621010,China)
出处
《工业安全与环保》
2023年第6期39-43,共5页
Industrial Safety and Environmental Protection
关键词
坡度隧道
烟气逆流
顶棚温度
隧道火灾
slope tunnel
flue gas countercurrent
ceiling temperature
tunnel fire
