Analysis of Smoke Distribution in the Subway Station with Various Main Tunnel Ventilations

초록

Fire-driven flow analysis in the underground subway station has been performed with various main tunnel ventilations. Shin-gum-ho station (depth: 46 m) in Seoul is selected as a simulation model. The ventilation mode is assumed to be emergency state. Various main tunnel ventilations are applied to operate in a proper way for helping of smoke exhaustion in platform. The entire station is covered for simulation. Ventilation diffusers are modeled as 95 square shapes of 0.6 m × 0.6 m in the lobby and as 222 square shapes of 0.6 m × 0.6 m and four rectangular shapes of 1.2 m × 0.8 m in the platform. The total of 7.5 million grids is generated and whole domain is divided to 22 blocks for MPI (massage passing interface) efficiency of calculation. LES (large eddy simulation) is applied to solve the momentum equation. Smagorinsky model (Cs