Numerical Simulation of Fire-driven Smoke and Heat Flow in a Deeply Underground Subway Station Using a Linux Cluster Computer(super-computer)

초록

Tunnel wind occurs due to various causes such as gradients of railway, locally different temperature, and car moving in the subway. In this study, transient numerical-simulations were performed to analyze the effects of the platform screen door and tunnel wind on fire-driven smoke and heat flow in the station when fire broke out at the center of the platform. Soongsil Univ. station (line number 7, 47m deep, underground) was chosen since it is one of the deepest underground subway stations in the Seoul metro. The 16 cores of the Linux cluster computer were employed for the fast calculation of 10,000,000 structured grids. Fire-driven flow was simulated with FDS code wherein the LES method was applied. The heat release rate was 10MW, and the Ultra fast model was applied for the growing model of the fire source.