Numerical Simulation on the Aerodynamic Drag of High-speed Train in Evacuated Tube

The aerodynamic drag of high-speed train in evacuated tube is studied by numerical simulation. Based on the 2D, viscosity, stable and incompressible Navier-Stokes equations and two-equation k-eturbulent model, the aerodynamic drag of high-speed train in 5 working pressure conditions at 3 different running speeds are calculated with finite volume method. The influence of different working pressure in evacuated tube on the aerodynamic drag is analyzed. The simulation result shows that the faster the running speed is, the larger decrease the aerodynamic drag of train have gotten as the working pressure continuously reduces; at certain running speed, the lower the working pressure is, the larger decrease the aerodynamic drag of train have gotten.