铁路隧道救援站火灾特性及烟气控制试验研究

发布时间：2018-04-12 06:12

本文选题：铁路隧道 + 救援站　；参考：《西南交通大学》2014年硕士论文

【摘要】：铁路是国家的重要基础设施,没有铁路的现代化就难以实现国家的现代化。近年来,随着长大铁路隧道的不断出现,在方便运输的同时也给铁路隧道的安全运营带来了新的挑战。本文以拟建的特长铁路隧道高黎贡山隧道为工程依托,通过救援站火灾模型试验,探明区间隧道火灾燃烧特性,研究不同通风方式下救援站发生火灾时的烟气蔓延规律、温度场分布、火灾通风排烟控制效果等,进而提出救援站发生火灾时合理的通风排烟方案。通过Fluent数值模拟和模型试验的对比研究,可以得出如下结论：(1)通过对纵向通风下救援站隧道内的温度场分布规律和烟气蔓延规律的分析研究,得出了试验中的临界风速,通过理论推导得出临界风速的理论值,进一步与试验值进行对比,说明理论预测临界风速的合理性。(2)在半横向通风下,有纵向诱导风速的排烟效果要好于无纵向诱导风速,且排烟量越大,排烟效果越好。(3)通过对纵向和半横向两种排烟方式结果的对比分析,得出半横向通风排烟是长大铁路隧道救援站火灾较佳的排烟方式。(4)通过对Fluent数值模拟与模型试验的对比,验证了二者在温度场分布及烟气蔓延规律的一致性。
[Abstract]:Railway is the important infrastructure of the country, without the modernization of railway, it is difficult to realize the modernization of the country.In recent years, along with the continuous appearance of the long railway tunnel, it brings new challenges to the safe operation of railway tunnel as well as convenient transportation.Based on the Gaoligongshan tunnel, an extra long railway tunnel, this paper studies the smoke spread law of the rescue station under different ventilation modes through the fire model test of rescue station to prove the burning characteristics of the tunnel fire.The distribution of temperature field, the control effect of fire ventilation and exhaust smoke, etc.Through the comparative study of Fluent numerical simulation and model test, we can draw the following conclusion: 1) through the analysis and study of temperature field distribution and smoke spread law of rescue station tunnel under longitudinal ventilation, the critical wind speed in the test is obtained.The theoretical value of critical wind speed is obtained by theoretical derivation, and further compared with the experimental value, which shows that the rationality of theoretical prediction of critical wind speed is better than that of no longitudinal induced wind speed under semi-lateral ventilation, and the smoke exhaust effect with longitudinal induced wind speed is better than that without longitudinal induced wind speed.And the larger the amount of exhaust smoke, the better the smoke exhaust effect. (3) through the comparative analysis of the results of longitudinal and semi-horizontal smoke exhaust methods,It is concluded that semi-transverse ventilation and smoke exhaust is the best way to exhaust smoke in the rescue station of long railway tunnel. Through the comparison of Fluent numerical simulation and model test, the consistency between them in temperature field distribution and smoke spread law is verified.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U458

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