A CFD SIMULATION AND OPTIMIZATION OF SUBWAY STATION VENTILATION

摘要

In rebuilding Tianjin Metro CFD simulations are performed to evaluate the original design of the ventilation system of Southwest Station and a new system is given to optimize the velocity and temperature fields at the station . Field measurements are conducted to validate the turbulence model and acquire boundary conditions. It is found that two-equation turbulence model is acceptable in simulating complex flow at the station. A method of simplifying the simulation of the transient flow at the station into steady flow is used and the validation criterion for this simulation is also given.