Aerodynamic Simulation of the Air Flow beneath the High Speed Train

Abstract:

Numerical simulations were carried out to investigate the air flow and pressure distributions beneath high speed trains, based on the three-dimensional Reynolds-averaged Navier-Stokes equations with the SST k-ω two-equation turbulence model. The simulation scenarios were of the high speed train, the CRH2, running in the open air at four different speeds: 200km/h, 250km/h, 300km/h and 350km/h. The results show that, the highest area of pressure is located at the front underbody part of the train whist the pressure for rest of the train is relatively small. Increasing speed does not visibly increase the pressure coefficient, indicating that the pressure increases with the square of the operational speed.

• Periodical: Applied Mechanics and Materials (Volumes 253-255)
• Pages: 2035-2040
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.253-255.2035
• Online since: December 2012
• Authors: Ye Bo Liu, Zhi Ming Liu
• Keywords: Aerodynamic Force, Aerodynamic Simulation, Air Flow Beneath the Train, High Speed Train (HST), Pressure Distribution

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