摘要
以地铁区间隧道为研究对象,考虑有无列车两种情况,采用火灾动力学模拟软件FDS 5.5.3对不同火源尺寸条件下控制地铁隧道火灾烟气不向上游蔓延的临界风速进行数值模拟。结果表明:火源功率一定时,有无列车情况下火源高度、长度及宽度均对临界风速产生影响。无列车时,临界风速随着火源高度、长度、宽度的增加逐渐减小;有列车时,临界风速随着火源高度、宽度的增加先增大后减小,随着火源长度的增大而递减。
Taking metro interzone tunnel as the research object, under the conditions that there is a train in tunnel or not, the critical velocity which could control the fire smoke don＇t spread to the upstream of fire in metro tunnel was simulated by using FDS 5. 5. 3 with different fire sizes. It is indicated that the height, length and width of fire all have effect on critical veloci- ty with the same fire power no matter there is a train in tunnel or not. The critical velocity decreases with the height, length and width of fire increase when there is no train in tunnel. While there is a train in the tunnel, the critical velocity increa- ses first and then decreases with the height and width of fire in crease, and the critical velocity decreases with the length of fire increase.
出处
《消防科学与技术》
CAS
北大核心
2013年第8期860-863,共4页
Fire Science and Technology
关键词
地铁隧道
火灾
纵向通风
火源尺寸
临界风速
metro tunnel
fire
longitudinal ventilation
fire sizes critical velocity
