铁道科学与工程学报2017，Vol.14Issue(4)：801-810,10.
隧道风对隧道火灾烟气扩散的影响研究
Research on impacts of tunnel wind on fire smoke spreading in an urban road tunnel
摘要
Abstract
Numerical simulations based on FDS were carried out to investigate the smoke movement and its temperature distribution in an urban road tunnel. In order to examine the impacts of tunnel wind on smoke dispersion, three tunnel fire scenarios, which included the empty tunnel, tunnel with static cars and tunnel with running cars, were used for comparisons in the longitudinal and the transverse smoke extraction system, respectively. The results show that for the longitudinal smoke extraction system, the smoke is fully controlled in the downstream of fire source due to tunnel wind induced by the vehicle movement; while for the transverse smoke extraction system, which is applied in the case of traffic jams, the low-speed tunnel wind induced by the ventilation can also effectively contain smoke spreading toward upstream. The calculation results for smoke spreading distance from fire source indicate that the vehicle-induced wind can contain smoke spreading within a upstream distance of 30 m from fire source in the longitudinal smoke extraction system, which much less than that in cases without this tunnel wind; while the vehicle-induced wind significantly increases spreading speed of smoke toward downstream. When the transverse smoke extraction system is employed, the ventilation–induced tunnel wind helps restrain smoke spreading toward upstream as well, but against extraction of smoke in downstream.关键词
公路隧道/火灾/烟气蔓延/隧道风/数值分析Key words
road tunnel/fire/smoke spreading/tunnel wind/numerical simulation分类
交通工程引用本文复制引用
吴世先,杨会,朱辉..隧道风对隧道火灾烟气扩散的影响研究[J].铁道科学与工程学报,2017,14(4):801-810,10.基金项目
国家自然科学基金资助项目(41371445) （41371445）
