摘要
总结国内外隧道火灾纵向通风排烟下抑制烟气回流临界风速的研究现状和规范规定。通过FDS数值模拟和缩尺寸模型试验对临界风速与隧道坡度的关系进行对比分析,得出结果认为,数值模拟和模型试验结果基本符合;在同一个坡度下,纵向通风速率与回流长度近似成线性关系;当坡度为零时,抑制烟气回流所需临界风速较大。
Research situation together with standards and prescriptions of longitudinal ventilation critical wind speed for depressing the tunnel fire smoke back flow were concluded.FDS and small scale model experiments were compared to analyze the relationship of critical wind speed and tunnel slope.Results showed that the results of FDS and experiments were mostly the same;when the slope was the same,the longitudinal ventilation speed was linearly related with return length;when the slope was 0,critical wind speed needed to depress the smoke back flow should be bigger.
出处
《消防科学与技术》
CAS
北大核心
2011年第7期580-583,共4页
Fire Science and Technology
关键词
隧道火灾
纵向通风
临界风速
tunnel fire
longitudinal ventilation
critical wind speed
