摘要
采用三维数值模拟的方法,对某带竖井隧道的火灾工况进行模拟计算。通过分析竖井烟囱效应作用下的压力场,以及由此对隧道内速度场和温度场产生的影响,进一步表明了在以竖井烟囱效应作用力为主要动力的情况下,配合以4m/s的通风风速可以有效遏止回流。
A 3D numerical simulation method is employed to simulate the fire condition in a tunnel with shaft. The pressure field in the shaft and the change of velocity field and temperature field in the tunnel caused by ＂chimney effect ＂, are analyzed in this paper. Further, it is proved that when the ＂chimney effect＂ is the main power it can effectively prevent the back-flow in addition of the ventilation velocity of 4m/s,
出处
《地下空间与工程学报》
CSCD
2006年第3期485-487,503,共4页
Chinese Journal of Underground Space and Engineering
关键词
火灾
隧道
烟囱效应
数值模拟
fire
tunnel
chimney effect
numerical simulation
