Numerical Simulation Of Environmental Control Modle Of Intercity Trains

With the rapid economic development, because of the advantages of large transport capacity, good safety and comfort, low energy consumption, low environmental pollution, saving land Resources, inter-city trains have been promoted in the country. But the increasingly tense urban land make inter-city train stations to be developed underground, which bring in a series of environmental problems. Currently, the environmental control system of inter-city trains underground station has not yet promulgated relevant criterion, so most of the designs refer to the standard of MTR. but the transport distance intercity trains is long, running speed is high, sometimes the trains do not slow down or stop when pass through some stations, and when the trains pass through the overtaking stations with high-speed, the air impact is different from the impact arising from the metro trains through the stations.so, it is necessary to study the environmental control system of the underground stations according to their characteristicsIn this paper, as some a typical underground station the Chang-Zhu-Tan Intercity Express a example, the three-dimensional CFD model is built according to the drawings, the temperature and velocity fields are studied when the station uses the two systems of platform screen doors and security gates. First, temperature and air velocity field of the two systems are comparative studied when no train stops, then, as boundary conditions by piston air temperature and velocity calculated by the one-dimensional SES software, fluid field change of the security door system is studied when one train stops, and two trains stop, and the results were compared with the PSD system.the conclusion is drawn that platform screen door system of underground stations in the Intercity trains is better than the safety door system in this subject.After platform screen doors system is determined, air distribution of ventilation air conditioning in underground station of inter-city train is studied. Temperature field and velocity field of the in public areas of platform screen door system under the action of the air-conditioning are analyzed, optimization setting of the supply and exhaust ports proposed.Finally, a tunnel model of the stations is separately established again. Influence on tunnel by piston winds generated when the train pass through the station with high speed is studied with the three-dimensional dynamic mesh method, pressure field and velocity of piston wind in tunnel of the station generated when the train pass through the station with 160km/h speed are studied.