Numerical Simulation Of Pressure Wave Of Tunnel With Perforated Partition Wall In High-Speed Railway

High-speed railway is the trend of the world railway development, and it also reflects an important symbol of a country's overall level of science and technology. With the continuous raising of train speed, the aerodynamic problems of the high-speed train are becoming more and more serious. Both the pressure waves inside the tunnel and the microwaves at the exit, which are aroused by high speed trains running through the tunnel, will leave an adverse effect on the safety of train operation, the economical efficiency, passengers' comfort as well as the environment surrounding of the tunnel. Solving the tunnel aerodynamic problems are a technical key for the development of high-speed rails. Our country will make great efforts to develop high speed special passenger line which including large numbers of long tunnels, in which a train can run at a high speed. It is highly necessary to study the mechanism of aerodynamic effect of tunnel and the measures to reduce it.The perforated partition wall setted in the double track tunnel may take serious effects on the pressure waves inside the tunnel. Based on three-dimensional Reynolds average Navier-Stokes equation of unsteady, compressible, viscous flow, and on k-Omega SST turbulent, the pressure wave of high-speed train running through the tunnel with perforated partition wall are investigated by three-dimensional numerical simulation, and by means of overset mesh with using real CRH2 G train geometry object. The main works of this thesis include:1. The flow field including a train running through the tunnel and the tunnel with perforated partition wall, and the Perforation position's flow field are analyzed. The tunnel pressure wave and train body pressure wave of a train running through the tunnel and the tunnel with perforated partition wall with different speed are analyzed and compared.2. By comparing the different partition wall structure's influence to the tunnel pressure wave and train body pressure wave, found that the perforated partition wall have no increased effect to them, and the perforated partition wall improve the mechanical structure of the tunnel, provide escape and rescue channel.3. By comparing the pressure wave of different parameters perforated partition wall, conclude the reasonably perforated area and distance by considering mechanical structure of the tunnel, the escape and the rescue.In this thesis the tunnel pressure waves of a train running through the tunnel with perforated partition wall are comprehensive investigated by three-dimensional numerical simulation for the first time in domestic and foreign. The research productions of this thesis offer important aerodynamic basis for the tunnel design and the optimized parameter of perforated partition wall. The studies will offer basic support for the development of high-speed railway tunnel aerodynamics and the tunnel construction.