摘要
基于Froude相似准则的1∶8隧道模型,从风速和温度水平两个维度,考察侧向支管排烟与纵向排烟耦合作用下对火灾发展及烟气扩散的影响.研究发现:隧道模型火源上游0.6 m处0.19 m高(对应实际隧道中火源上游4.8 m处1.52 m高)的温度在侧排风机50 Hz和纵向风机40 Hz耦合作用下仅用10 s即可降至60℃以下;当在侧排风机50 Hz和纵向风机频率达到25 Hz及以上时,25%~75%温度数据箱体处于60℃以下.因此可根据该研究成功制定双层盾构隧道下层汽车火灾的控烟策略,最大程度保障人民生命财产安全.
Based on Froude criterion,a 1∶8 tunnel model was used to investigate the influence of the coupling effect of lateral branch smoke exhaust and longitudinal smoke exhaust on fire development and smoke diffusion from two dimensions of wind speed and temperature level.It is found that the temperature of 0.19 m high at 0.6 m upstream of the tunnel model fire source(corresponding to 1.52 m high at 4.8 m upstream of the fire source in the actual tunnel)can be reduced to below 60℃in only 10 s under the coupling effect of 50 Hz side exhaust fan and 40 Hz longitudinal fan.25%~75%of the temperature data box is below 60℃when the lateral exhaust fan is 50 Hz and the longitudinal fan frequency reaches 25 Hz or above.Therefore,according to this research,the smoke control strategy of the lower car fire in the double-shield tunnel can be successfully formulated to ensure the safety of people's lives and property to the greatest extent.
作者
柳承徽
方正
吴限
LIU Chenghui;FANG Zheng;WU Xian(School of Civil Engineering,Wuhan University,Wuhan 430072,China)
出处
《华中科技大学学报(自然科学版)》
北大核心
2025年第8期98-105,共8页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(5237060995).
关键词
隧道
火灾
Froude
支管排烟
纵向排烟
控烟策略
tunnel
fire
Froude
branch pipe smoke exhaust
longitudinal smoke exhaust
control strategy of fire smoke
