Computational Fluid Dynamics Simulation of Ventilation Effect of a Large Cross-Section Cable Tunnel

Abstract:

The finite element software ADINA was employed in this paper to study the ventilation effect of a large cross-section cable tunnel by using a computational fluid dynamics method. The temperature and ventilation zoning inside a cable tunnel were determined according to the characteristics of the large cross-section cable tunnel. With the ambient tunnel characteristics and tunnel cross-section layout being taken into consideration, a three-dimensional model for large cross-section cable tunnels was established; the computations indicate that the main influential factors of ventilation effect of large cross-section cable tunnels are intake airflow rate, intake air temperature, exhaust airflow rate, ventilation duration, tunnel length, fire door layout, and so on. The average air velocity in the tunnel was about 60 % of the intake airflow rate. The intake air temperature has much impact on tunnel temperature distribution within a range of 30 m away from the tunnel origin, as shown by a significant cooling effect when intake air temperature falls; whereas the intake air temperature has less impact on tunnel temperature distribution beyond 30 m from the tunnel origin.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 1404-1410
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.1404
• Online since: August 2013
• Authors: Jun Sheng Chen, Shu Zhuo Liu, Ying Guang Fang, Hai Hong Mo
• Keywords: Computational Fluid Dynamics (CFD), Large Cross-Section Cable Tunnel, Ventilation Effect

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