Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Influence of Different Longitudinal Wind on Natural Ventilation Efficiency with Vertical Shaft Under Different Fires in Tunnel
Abstract The influence of longitudinal wind on the nature of ventilation with a vertical shaft in tunnel fires was investigated numerically by large eddy simulations (LES). The smoke flow characteristics under the coupled effects of different longitudinal wind and different heat release rates were analyzed. The dimensionless value φ has been introduced to define the exhaust efficiency. The results show that under the same longitudinal wind velocity, the bigger the fire can lead to a better exhaust efficiency. In a similar manner, an optimal wind speed will achieve best performance in shaft exhaust efficiency and toxic gas emission. The traditional simple wind speed calculation is not suitable for all of the cases; it is necessary to adjust the ventilation speed according to different fire situations.
Influence of Different Longitudinal Wind on Natural Ventilation Efficiency with Vertical Shaft Under Different Fires in Tunnel
Abstract The influence of longitudinal wind on the nature of ventilation with a vertical shaft in tunnel fires was investigated numerically by large eddy simulations (LES). The smoke flow characteristics under the coupled effects of different longitudinal wind and different heat release rates were analyzed. The dimensionless value φ has been introduced to define the exhaust efficiency. The results show that under the same longitudinal wind velocity, the bigger the fire can lead to a better exhaust efficiency. In a similar manner, an optimal wind speed will achieve best performance in shaft exhaust efficiency and toxic gas emission. The traditional simple wind speed calculation is not suitable for all of the cases; it is necessary to adjust the ventilation speed according to different fire situations.
Influence of Different Longitudinal Wind on Natural Ventilation Efficiency with Vertical Shaft Under Different Fires in Tunnel
Cong, Haiyong (Autor:in) / Wang, Xishi (Autor:in) / Zhu, Pei (Autor:in) / Wang, Zhigang (Autor:in) / Jiang, Tonghui (Autor:in) / Tan, Qiong (Autor:in)
Fire Science and Technology 2015 ; 933-940
05.10.2016
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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