Numerical analysis of three-dimensional flow past a high-speed electric train with turbulent boundary layer separation
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Abstract
An approach to the numerical study of three-dimensional flow past a high-speed electric train is considered, including the case of turbulent boundary layer separation. The method of viscous-inviscid interaction is used to compute the aerodynamic characteristics. The results of calculating the 3D flow past two configurations of a high-speed electric train, taking into account the close proximity of the ground surface, are presented for a train speedV∞=300 km/h and the per meter Reynolds number Re=5.6·106 m−1. One of these configurations is shown to have the advantage of separationless flow past a front locomotive and less intense diffuser separations on the afterbody of a rear locomotive. A local separation zone on the sides of the front locomotive's nose was detected in one of the cases considered.
Keywords
Boundary Layer Reynolds Number Ground Surface Turbulent Boundary Layer Separation ZonePreview
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