Keywords: high-speed maglev train, train/tunnel aerodynamics, tunnel aerodynamic effect, aerodynamic drag, entering and leaving tunnel, tunnel.

When the operating speed of the high-speed maglev train reaches 600 km/h, the aerodynamic drag and lift increase sharply, resulting in significant differences and larger variations in aerodynamic lift among the train cars. In scenarios such as entering and exiting tunnels or encountering other trains, the overturning moment, yaw moment, and pitch moment of the train significantly increase, sometimes even experiencing severe fluctuations. This not only seriously affects the stability of high-speed maglev train operation but also increases the difficulty of precise control of the suspension guidance system. In this study, based on the three-dimensional unsteady compressible Navier-Stokes equations and utilizing the k-epsilon turbulence model, we investigate the aerodynamic characteristics of Shanghai maglev trains with a 3-car formation operating at a speed of 600 km/h, both individually and during encounters while passing through tunnels. We analyze the peak and amplitude variations of aerodynamic drag, lift, and lateral forces for the entire train and different train formations, aiming to understand the aerodynamic behavior of high-speed maglev trains when operating inside tunnels. The research findings indicate that when two trains encounter each other compared to a single train passing through a tunnel, the maximum aerodynamic drag, lift, and lateral force of the entire train increase by 42.04%, 27.85%, and 625.45%, respectively. When a single train passes through, the aerodynamic drag, lift, and lateral force on the rear car are greater than those on the front car and greater than those on the middle car. When two trains encounter, the aerodynamic drag and lift on the rear car are greater than those on the front car and greater than those on the middle car, but the lateral force on the front car is greater than that on the rear car and greater than that on the middle car. The research results can provide references for the development of high-speed maglev trains, the construction of maglev lines, and the control of train electromagnetic forces.

download the full-text of this paper (PDF, 7 pages, 614 Kb)

go to the previous paper
go to the next paper
return to the table of contents
return to the volume description