地铁区间隧道烟气稳定层化长度与临界层化风速
Smoke Stratification Length and Critical Stratification Velocity in a Metro Tunnel
采用因次分析的方法推导了地铁区间隧道火灾烟气稳定层化长度与临界层化风速的无因次表达式；采用FDS6.5.2模拟分析了纵向风速及断面型式对烟气层化长度的影响，提出了稳定层化长度与临界层化风速的预测模型，以重庆某一地铁区间隧道为原型，建立了1：15小尺寸模型实验台开展试验研究。研究结果表明：本文提出的烟气稳定层化长度与临界层化风速预测模型的模拟结果与小尺寸试验结果吻合较好。
In this paper, the dimensionless expressions of the stable smoke stratification length and the critical stratification wind velocity in metro tunnels were deduced via a dimensional analysis. The effect of longitudinal velocity and cross section on the length of stability layer is analyzed based on the simulation data of FDS6.5.2. In addition, the prediction models of the smoke stratification length and the critical stratification velocity were established. The small scale experiments were conducted in a 1/15 scale tunnel constructed based on a real metro tunnel in Chongqing. The results show that the results obtained by the proposed prediction models agree well with those of small-scale model experiments.
刘宇、孙祥、翁庙成
铁路运输工程灾害、灾害防治安全科学
安全工程烟气层化长度临界层化风速因次分析小尺寸试验
safety engineeringsmoke stratification lengthcritical stratification wind velocitydimensionless analysis methodsmall-scale model experiment
刘宇,孙祥,翁庙成.地铁区间隧道烟气稳定层化长度与临界层化风速[EB/OL].(2017-10-11)[2025-08-03].http://www.paper.edu.cn/releasepaper/content/201710-32.点此复制
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