The Numercial Simulation For The Influence Of High-Speed Railway Tunnel Pressure Field By Shafts' Number And Position

60's last century later,the developed country in the world rose high-speed railway building one after another, the railway development entered a new mileage, China also promoted the quick development of the high-speed railway because of the progress of the economy and the society in this century. A long with so many tunnels emerged in the high-speed railway,the problems of aerodynamic and the influence of the surroundings environment by high-speed train entrys tunnel is already driveded the international community scholar's attention, so a great deal of research also launched one after another, and many worth results are also obtained. Meanwhile ,shafts as one of the important measures of alleviating aerodynamic problems is being pay attention more and more.In this paper,the theroy of tunnel aerodynamic CFD was building up firstly ,after then the point carried on the influence of shafts existing about the flow field and the micro-pressur wave. The result from this caculation method and the foreign experiments agreed well, which could presume this paper's method is accuracy.With the theories analysis and numerical simulation ,applying the two principle of shafts reducing micro-pressur wave, this paper principiumly confirm the influence ruel of the shafts' position and number about the micro-pressure wave, and the formula of ascertaining shafts position and number was given. The condition of shafts and tunnel hood coexisting will emerge a lot in the over river tunnel of the high-speed railway, with the numerical simulation, this paper contrast the choice of hood carefully, and confirm the form and parameter of the optimization hood.Otherwise, this paper's calculation method can also be applied to simulate the drag of the train after it entrying tunnel,the result agreed well with the oversea result in theory, the changing curve diagram of drag at any time was also obtained.