Influence of Cross Section Shape of Maglev Track on Aerodynamic Performance and Flow Field Structure under Crosswind

Abstract

When the maglev train runs at high speed, the lift force and lateral force increases, aerodynamic problem is more serious under strong crosswind. At present, the aerodynamic performance optimization of maglev train is mainly concentrated on the structure of train body, hardly any research on the influence of track. In this paper, based on three-dimensional, steady, incompressible N-S equation and k- e turbulence model, Shanghai TR08 maglev train running at the speed of 250km/h under 20m/s crosswind is simulated. Comparing the commonly used I and T tracks, this paper studies the influence of the track shape on the aerodynamic performance of Shanghai maglev, and analyzes the flow field around the track and the train. It has been seen that when running on “T” type track, the pressure fluctuation is smaller and the pressure distribution at the bottom of the train is more even, besides, negative pressure on the leeward side will significantly decrease. “T” type track basically has no influence on drag, but it will increase lift force and decrease lateral force. When running on “I” type track, the shape of the plate affects the aerodynamic force to some extent, and has little influence on pressure and velocity distribution at the top of the train where airflow is separated.