隧道内通风及障碍物对甲醇蒸气扩散的影响分析

发布时间：2018-05-08 20:35

本文选题：隧道 + 通风　；参考：《中国安全生产科学技术》2017年03期

【摘要】：为了研究环境条件对甲醇蒸气扩散以及危险区域的影响,应用CFD方法对隧道内甲醇蒸气的扩散进行模拟。结果表明:隧道内通风能够避免泄露区域产生蒸气积聚;障碍物位于泄漏源的上风向时,通过障碍物的紊乱风流携带作用较强,使甲醇蒸气在下游空间的分布更广,形成的危险区域也较大;障碍物较多时,隧道内的流场紊乱程度较大,气流的携带作用和障碍物间的蒸气积聚作用较强,导致蒸气分布范围广且规律性差;在通风与障碍物的综合影响作用下,甲醇蒸气扩散和分布主要集中于隧道的中下部,上部稳定的气流使蒸气不易产生积聚。
[Abstract]:In order to study the influence of environmental conditions on methanol vapor diffusion and dangerous region, the CFD method was used to simulate the methanol vapor diffusion in tunnels. The results show that ventilation in the tunnel can avoid the accumulation of steam in the leaking area, and when the obstacle is located in the upper wind direction of the leakage source, the turbulent air flow through the barrier has a strong effect on carrying it, which makes the distribution of methanol vapor in the downstream space wider. When there are many obstacles, the flow field in the tunnel is disordered, the air flow is carried and the vapor accumulates between the obstacles, which results in a wide range of steam distribution and poor regularity. Under the influence of ventilation and obstacles methanol vapor diffusion and distribution are mainly concentrated in the middle and lower part of the tunnel.
【作者单位】：中南大学防灾科学与安全技术研究所;中国安全生产科学研究院地铁火灾与客流疏运安全北京市重点实验室;建筑消防工程技术公安部重点实验室;
【基金】：国家自然科学基金项目(51576212,51622403) 国家重点研发计划课题(2016YFC0802501) 建筑消防工程技术公安部重点实验室开放课题(KFKT2014ZD02) 中央高校基本科研业务费专项资金资助项目
【分类号】：U453.5

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