Effect of double line viaduct noise barrier height on aerodynamic characteristics of high speed train

Viaducts are widely built in the modern high speed railway system. The noise barrier will have some effect on the aerodynamic characteristics of the high speed train running on the double line viaduct. It is essential that the research on this effect will be made. It will provide some engineering reference for the high speed railway construction. Using the CFD(Computational Fluid Dynamics) soft Fluent, the effect of double line viaduct noise barrier height on the aerodynamic characteristic of the high speed train has been researched. When the high speed train runs on the windward, the aerodynamic forces and moments acting on the train are analyzed. The simulation results show that the aerodynamic forces and moments on the high speed train have some discipline with the changing of the noise barrier height. The side force coefficient decreases gradually in the head train, middle train and the rear train with the height increase of the noise barrier. The rolling moment of the head train reaches the maximum among the whole train and decreases gradually with the increase of the noise barrier height.