灾害学2026，Vol.41Issue(4)：73-83,11.DOI:10.3969/j.issn.1000-811X.2026.04.008
城市特长隧道带散排口的分段纵向排烟模式排烟性能研究
Study on Smoke Exhaust Performance of Segmented Longitudinal Smoke Exhaust Mode with Dispersed Exhaust Outlets in Urban Extra-long Tunnels
摘要
Abstract
To investigate the smoke exhaust performance of the dispersed exhaust mode in urban extra-long tunnels,longitudinal temperature decay patterns,the flow and temperature field characteristics at the dispersed ex-haust outlets,and the heat exhaust efficiency under varying heat release rates,longitudinal velocities,and exhaust volumes are analyzed in this study.The results show that as the heat release rate increases,the amount of high-temperature smoke generated within the tunnel grows,leading to greater heat exhaust through the outlets;howev-er,this results in poorer smoke control and higher overall temperatures inside the tunnel.As the longitudinal ve-locity increases,smoke spread accelerates,and the maximum temperature rise beneath the ceiling decreases,but excessively high longitudinal velocities impair smoke control via the dispersed exhaust outlets.Increasing the ex-haust volume raises the heat exhaust through the outlets and lowers the downstream temperatures.Although larg-er exhaust volumes improve smoke control,they reduce the utilization rate of the downstream outlets,causing wasted exhaust capacity.The heat exhaust efficiency of the dispersed exhaust outlets is nearly independent of the heat release rate and the longitudinal velocity,but increases with the exhaust volume.Based on this finding,a prediction model for the exhaust efficiency of the dispersed exhaust outlets,correlated with the dimensionless ex-haust volume,is proposed.In practical engineering,the heat exhaust efficiency exhibits a marginal effect as the exhaust volume varies;therefore,a reasonable exhaust volume should be selected in design.关键词
隧道火灾/散排口/分段纵向排烟/排烟效率Key words
tunnel fire/dispersed exhaust outlets/segmented longitudinal smoke exhaust/smoke exhaust efficiency分类
资源环境引用本文复制引用
梁志雯,方忠强,孙统立,岳犇,于子涵,封世林,徐志胜..城市特长隧道带散排口的分段纵向排烟模式排烟性能研究[J].灾害学,2026,41(4):73-83,11.基金项目
苏通第二过江通道工程"城市建成区长隧道消防安全与防灾救援关键技术研究"(STE-ZT-3-11) （STE-ZT-3-11）
