Assessment of crosswind safety of a 400 km/h high-speed train through reduced-scale wind tunnel testing.
ORAL
Abstract
South Korea is conducting research to operate a high-speed train (HST) with a maximum speed of 400 km/h in 2034 [1]. As the speed of a HST increases, the possibility of overturning due to crosswind increases [2], so it is necessary to assess crosswind safety when introducing a new HST.
In this study, the aerodynamic coefficient was measured to evaluate the crosswind safety of the HST through reduced-scale wind tunnel test. Wind tunnel testing was conducted in Low-Speed Wind Tunnel (LSWT) of Korea Aerospace Research Institute, where the specifications were satisfied with the requirements in EN 14067-6. 4.3% reduced-scale model being designed with a maximum speed of 400 km/h was installed on a split plate equipped with turntable located 1 m above the floor of the test section to prevent boundary layer disturbance. The turntable was rotated from 0° to 90°, and the tests were performed at the maximum wind speed of LSWT. Forces and moments were measured by using a 6-axis load cell, and the rolling moment coefficient around the leeward rail (Cmx,lee) to evaluate the crosswind safety was calculated. As a result, Cmx,lee of the present HST model showed 8% lower than that of KTX-Cheongryong, currently in commercial operation with a maximum speed of 320 km/h, implying that the crosswind safety has been improved for the newly designed model.
In this study, the aerodynamic coefficient was measured to evaluate the crosswind safety of the HST through reduced-scale wind tunnel test. Wind tunnel testing was conducted in Low-Speed Wind Tunnel (LSWT) of Korea Aerospace Research Institute, where the specifications were satisfied with the requirements in EN 14067-6. 4.3% reduced-scale model being designed with a maximum speed of 400 km/h was installed on a split plate equipped with turntable located 1 m above the floor of the test section to prevent boundary layer disturbance. The turntable was rotated from 0° to 90°, and the tests were performed at the maximum wind speed of LSWT. Forces and moments were measured by using a 6-axis load cell, and the rolling moment coefficient around the leeward rail (Cmx,lee) to evaluate the crosswind safety was calculated. As a result, Cmx,lee of the present HST model showed 8% lower than that of KTX-Cheongryong, currently in commercial operation with a maximum speed of 320 km/h, implying that the crosswind safety has been improved for the newly designed model.
*This work is supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant no. RS-2022-0014-3396).
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Publication: [1] Minstry of Land, Infrastructure, and Transport (2021) 4th National Railway Network Construction Plan.
[2] Xiao, X. B., Ling, L., Xiong, J. Y., Zhou, L., & Jin, X. S. (2018). Study on the safety of operating high-speed railway vehicles subjected to crosswinds. China's High-Speed Rail Technology: An International Perspective, 183-209.
[3] European Committee for Standardization (2022) EN 14067-6:2018+A1:2022 Railway applications - Aerodynamics - Part 6: Requirements and test procedures for cross wind assessment
Presenters
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Beomsu Kim
- Korea National University of Transportation