A numerical study on the influence of slope and curvature on smoke flow in special section tunnel with natural ventilation

2017 2nd International Seminar on Advances in Materials Science and Engineering

Wang, Wenzhou^1 ; Zhou, Xianping^1 ; Liu, Zhigang^1 ; Liu, Ya^2 ; Liu, Wanfu^2 ; Hong, Li^3

Administration Center of Zhuhai Link Line Project of Hong Kong-Zhuhai-Macau Bridge, Guangdong, China^1

School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, China^2

China Academy of Building Research, Beijing, China^3

关键词: Buoyancy effect;    Fire dynamics simulator;    Natural ventilation;    Smoke flows;    Special sections;    Spreading speed;    Tunnel model;    Upstream direction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012099/pdf
DOI  :  10.1088/1757-899X/231/1/012099

来源: IOP

【 摘 要 】

In this study, a special section tunnel model was established by using FDS (Fire Dynamics Simulator). The influences of lope and curvature on smoke flow under natural ventilation have been studied. The results showed that under the condition of natural ventilation, the slope has some influences on the smoke flow in special section tunnel. The smoke spreading speed is accelerated along the upstream direction and decrease along the downstream direction due to buoyancy effect of slope. The steeper the tunnel, the more obvious the buoyancy effect. The curvature has little effect on the flow of flue gas.