Abstract：The effects of atmospheric pressure and temperature conditions along the Sichuan–Tibet railway on the tunnel aerodynamic drag of electric multiple unit (EMU) trains were investigated by collecting and analyzing meteorological data of the Ya’an to Linzhi section of the Sichuan–Tibet railway. A numerical model for the prediction of the tunnel aerodynamic drag of EMU trains was established, and the effects of the variations in air pressure and temperature along the Sichuan–Tibet railway were analyzed in numerical simulations. The results show that the atmospheric pressure and temperature affect the tunnel aerodynamic drag of EMU trains. A lower atmospheric pressure leads to lower tunnel aerodynamic drag whereas a higher air temperature leads to higher tunnel aerodynamic drag of the EMU train. Compared with the normal meteorological environment of the plains, the variation in the atmospheric pressure along the Sichuan–Tibet railway causes an approximately 30% change to the tunnel aerodynamic drag of EMU trains, whereas the effect of the variation in air temperature is around 10%.
凌亮, 胡彦霖, 杨泽钰, 王开云, 翟婉明. 川藏铁路特殊气象环境对动车组隧道气动阻力的影响[J]. 西南交通大学学报, 2022, 57(1): 158-165.
LING Liang, HU Yanlin, YANG Zeyu, WANG Kaiyun, ZHAI Wanming. Effect of Sichuan–Tibet Railway Special Meteorological Environment on Tunnel Aerodynamic Drag of Electric Multiple Unit Train. Journal of SouthWest JiaoTong University, 2022, 57(1): 158-165.
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