JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Aerodynamic Analysis of a Train Running in a Tunnel(II)-Aerodynamics of Two-Trains-
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Aerodynamic Analysis of a Train Running in a Tunnel(II)-Aerodynamics of Two-Trains-
Kim, Hui-Dong;
  PDF(new window)
 Abstract
As a high-speed train enters a tunnel, a compression wave is generated ahead of it due to the piston action of train. The compression waves propagate along the tunnel and reflect backward at the exit of tunnel. A complex wave phenomenon appears in the tunnel, because of the successive reflections of the pressure waves at the exit and entrance of tunnel. The pressure waves can give rise to large pressure transients which impose the fluctuating loads on the running train. It is highly needed that the pressure transients should be predicted to design the train body and to improve the comfort for the passengers in the train. In the present study, the pressure transients and aerodynamic drag for two-trains running in a tunnel were calculated numerically for a wide range of train speed, and compared with the results of the previous tunnel tests and calculations for one train. The present calculation results agreed with ones of the tunnel tests, and the mechanism of pressure transients was made clear.
 Keywords
Compressible Flow;High-Speed Train;Railway Tunnel;Pressure Wave;Aerodynamic Drag;Compression Wave;Shock Tube;Two-Train;
 Language
Korean
 Cited by