摘要
隧道消防安全问题已引起人们广泛关注。由于隧道结构的特殊性和空间位置的局限性,开展隧道火灾烟气流动分布规律研究极为重要。本文采用CFD软件FDS,对某公路隧道在设定纵向通风风速情况下的慢、中、快、特快四种火灾增长类型,且规模均为20MW的火灾进行了数值模拟,分析了其纵、横断面火灾温度随时间变化规律及沿隧道纵向分布规律,研究了各个排烟口处的温度、可见度、速度、氧气浓度随时间变化特点。
In this paper, we adopt computational fluid dynamics method to simulate road tunnel fires with the help of software FDS. The fire density is set as 20MW and four types of fire growth rate are defined as slow, medium, fast and super fast, respec- tively. The timd -varying feature of fire temperature field＇along the road tunnel is investigated including longitudinal distribution and cross - section distribution. Furthermore, the smoke layer height, oxygen concentration and velocity in each exhaust port is also studied. By means of processing and analyzing corresponding simulating results, we provide a theoretical basis for crowd e- vacuation research.
出处
《华北科技学院学报》
2013年第4期29-34,43,共7页
Journal of North China Institute of Science and Technology
