Decomposition and reduction of aerodynamic drag of high-speed train

초록

During the development of HEMU-430X, extensive aerodynamic study has been performed to assess and reduce the aerodynamic drag of the train. Wind tunnel measurements for the 1/20th scale train model have been performed up to 70m/s freestream wind velocity. Numerical simulation has been conducted and the solutions have been compared with wind tunnel measurements and validated. The moving ground effect has been investigated and the contributions of pressure drag and skin friction drag at each car have been analyzed to assess the composition of aerodynamic drag quantitatively.