Numerical Simulation Study On Ventilation System Of Shenyang Subway

In consideration of the huge investment on subway construction and decades of operation, reliable comparison analysis, numerical simulations and model experiment towards the station ventilation plan are necessary as well as environmental impact assessment of the station. Shenyang, located in northeast of China, is characterized by high latitudes climate in summer and winter,so there are large differences between Shenyang subway environmental control system model and those of other city which have opened subway in China. In this thesis, Shenyang subway station of Shenyang subway line 1 as an example, research on environmental control on numerical simulation, comparative analysis and piston wind are done.Conditioning system numerical simulation and natural ventilation system by numerical simulation is done in this thesis with help of CFD software towards Shenyang metro system in both summer and winter according to CFD theory. A unique ventilation scheme which best suits for Shenyang subway system is selected according to the simulation results that natural ventilation system in summer and air conditioning system in winter.The piston wind is an important source of metro airflow. In this thesis, with the application of moving mesh, I simulat the the effort of the piston wind on the interval tunnel, and also summarizes the motion law of the piston wind in the basic of analysis of the tunnel piston wind formation mechanism,which is the speed of interval tunnel piston wind increases with the increase of train speed. The currently running speed of Shenyang subway is 30km/h, the research on the piston wind will provide the theory basis for the environmental control system design on interval tunnel after train speed increase.This thesis can provides valuable reference materials for ventilation system design of other subway line in Shenyang.