摘要
比较分析隧道火灾纵向排烟方式下的临界风速,研究不同理论公式得出的临界风速差别大小和其随火灾规模、隧道尺寸变化的情况。对隧道尺寸和火源规模无量纲处理,以消除隧道尺寸对临界风速的影响。将已有实体隧道火灾试验和缩比例隧道火灾试验测得的临界风速无量纲值作为参照依据,将不同临界风速理论公式计算结果与已有实体和缩比例试验结果作对比,确定临界风速理论计算方法,同时验证了临风速结果对超大断面隧道的适用性。
By summarizing the difference of theoretical formula of critical wind speeds, the varying patterns of critical wind speeds with the change of fire powers and tunnel sizes were ob- tained. Take longitudinal ventilation test in previous study as a reference basis, by the dimensionless control of fire power and tunnel size, different theoretical critical wind speeds and the test results were compared. Dimensionless optimum formula was confirmed corresponding to heat release rate and tunnel gradient, and the results are also suitable for big section tun- nels.
出处
《消防科学与技术》
CAS
北大核心
2013年第3期252-255,共4页
Fire Science and Technology
关键词
隧道火灾
纵向排烟
临界风速
tunnel fire
longitudinal ventilation
critical windspeed
