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- W2364242109 abstract "Characteristics of the cross wind field,such as uniform winds and lower atmospheric boundary layer winds,have directly influence on the operation safety of high-speed trains which run in the cross wind environment.In order to accurately assess the effect of cross winds on trains running on plains,on the basis of the three-dimensional steady compressible flow of NS equations,using the SST k-ω two-equation turbulence model and finite volume method,the flow field and aerodynamic characteristics of the high speed train running at 350 km/h in the cross wind field of uniform winds and lower atmospheric boundary layer winds were simulated numerically and analyzed.The results show as follows:For a high-speed train running under cross winds on a plain,the aerodynamic lift force,lateral force and overturning moment acting on the train increase rapidly with increasing of the wind direction angle;when the train runs through the lower atmospheric boundary layer,compared to the uniform wind filed,the pressure differences of the train at the top bottom and on two sides are less,the lateral force and overturning moment are also less,and the aerodynamic lift force is of uncertainty in the case of increasing of the wind direction angle.Using the uniform wind field for evaluation of operation safety of high-speed trains running under cross winds on a plain will overestimate the risks cross winds may bring about in train operation and will over limit the train speed so that the normal train operation efficiency is affected.The lower atmospheric boundary layer winds are suggested to be used for evaluation of the aerodynamic performance of a train." @default.
- W2364242109 created "2016-06-24" @default.
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- W2364242109 date "2011-01-01" @default.
- W2364242109 modified "2023-09-23" @default.
- W2364242109 title "Research on Influence of Characteristics of Cross Wind Field on Aerodynamic Performance of a High-speed Train" @default.
- W2364242109 hasPublicationYear "2011" @default.
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