Relative Flow Analysis around Passing-Train in the Single-Bore Subway Tunnel with Vertical Ventilation Using Moving IBM

초록

Moving IBM(Immersed Boundary Method) has been applied to analyze the relative motion of railway car flow in the single-bore subway tunnel with vertical ventilation. The tested car body was modeled by cylinder type body. The subway tunnel was assumed to be the single-car-passing straight type(single-bore tunnel). The modeled car was relatively moved forward. On the other hand, the tunnel and vertical ventilation were fixed. The momentum equations were solved by LES method in FDS code developed by NIST. The initial condition of fluid in the subway tunnel was stationary. The Re number is 1,500 based on the cylinder radius. The turbulent flow field in the subway tunnel and vertical ventilation shaft are to be qualitatively investigated.