Study on the Shaft Height of Natural Ventilation Using Smoking Shaft in Urban Tunnel

Wei Zhong; Jian Peng Yang; Bao An Pei; Wei Zhang

doi:10.4028/www.scientific.net/AMM.90-93.2297

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 90-93Study on the Shaft Height of Natural Ventilation...

Study on the Shaft Height of Natural Ventilation Using Smoking Shaft in Urban Tunnel

Abstract:

The characteristics of smoke flow in natural ventilation shaft are studied in this paper, Using the computational fluid dynamics software FDS5.0 to build a 3D model of an urban tunnel with a smoking shaft, Large Eddy Simulation model was used to obtain the structure of flow field and the mass flow rate of natural ventilation at different shaft height, The results show that when the shaft height is low, the driving force of exhaust is weak and the exhaust capacity reduces rapidly, the flow state in shaft is controlled by horizontal inertia force; when the shaft height increase to a critical height, the exhaust effect enhance significantly, the flow state in shaft will change to stack effect control.

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Periodical:

Applied Mechanics and Materials (Volumes 90-93)

Pages:

2297-2300

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.90-93.2297

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Online since:

September 2011

Authors:

Wei Zhong, Jian Peng Yang, Bao An Pei, Wei Zhang

Keywords:

Fire, Natural Ventilation, Shaft Height, Urban Tunnel

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References

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