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

초록

Fire-driven flow analysis in the deeply underground subway station has been performed with various capacity of main tunnel ventilations. Shin-gum-ho station (depth : 46m) is selected as a simulation model. The ventilation operation mode in platform of Shin-gum-ho station is set up as a full exhaustion for platform-fire emergency. In this study, various main tunnel ventilations are applied to operate in a proper way for helping of smoke exhaustion in platform. Ventilation diffusers were modeled as the 222 square shapes of 0.6m(x)ⅹ0.6m(y) and the 4 rectangular shapes of 1.2m(x)ⅹ0.8(m)(y). The whole station was covered for this analysis and total of 7.5 million grids were generated for this simulation. Large Eddy Simulation method was employed to solve the momentum equations. In order to enhance the efficiency of calculation, parallel processing by MPI was used. The distribution of carbon monoxide (CO) was calculated with various capacity of main tunnel and compared with each other.