TY - JOUR
T1 - Influence of wind barrier on the transient aerodynamic performance of high-speed trains under crosswinds at tunnel–bridge sections
AU - Yang, Weichao
AU - Deng, E.
AU - He, Xuhui
AU - Luo, Lusen
AU - Zhu, Zhihui
AU - Wang, Youwu
AU - Li, Zhitang
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos 51978670), The National Science Fund for Distinguished Young Scholars (Grant No. 51925808) and the Project of Science and Technology and Development Plan of China National Railway Group Co., Ltd (Grant Nos. K2019G041 and KYY2020138(20-22)). In addition, the authors would like to thanks Ms. Xinyang Li for her great support for this paper.
Funding Information:
This work was supported by the National Natural Science Foundation of China [grant number 51978670], China National Funds for Distinguished Young Scientists [grant number 51925808]; the Project of Science and Technology and Development Plan of China National Railway Group Co., Ltd [grant number K2019G041], [grant number KYY2020138(20-22)]. This work was supported by the National Natural Science Foundation of China (Grant Nos 51978670), The National Science Fund for Distinguished Young Scholars (Grant No. 51925808) and the Project of Science and Technology and Development Plan of China National Railway Group Co., Ltd (Grant Nos. K2019G041 and KYY2020138(20-22)). In addition, the authors would like to thanks Ms. Xinyang Li for her great support for this paper.
Publisher Copyright:
© 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2021/5
Y1 - 2021/5
N2 - Porous wind barriers (PWBs) are gradually applied to tunnel–bridge–tunnel infrastructures (TBTIs) along high-speed railway lines. Due to the remarkable aerodynamic effect of high-speed trains (HSTs), the windproof performance of a PWB at tunnel–bridge section (TBS) is particularly critical when a HST passes through the TBTI under crosswind. And it seems to be easily ignored by researchers. This study aims to determine the influence mechanism of the PWB in the TBS. A CFD dynamic model of air–train–PWB was built based on porous media theory, and its reliability is verified by model and field tests. The main results are as follows: the corresponding variation amplitudes of the train’s aerodynamic load coefficients are reduced by 36–95% when a PWB is set in the TBS; adopting the same design parameters along the full-length PWB on the TBTI is unreasonable; the PWB height and porosity in the TBS must be increased and reduced more than 33%, respectively, to achieve equivalent windproof performance. The conclusions in this paper can provide a preliminary idea for the optimization design of the PWB on the TBTI.
AB - Porous wind barriers (PWBs) are gradually applied to tunnel–bridge–tunnel infrastructures (TBTIs) along high-speed railway lines. Due to the remarkable aerodynamic effect of high-speed trains (HSTs), the windproof performance of a PWB at tunnel–bridge section (TBS) is particularly critical when a HST passes through the TBTI under crosswind. And it seems to be easily ignored by researchers. This study aims to determine the influence mechanism of the PWB in the TBS. A CFD dynamic model of air–train–PWB was built based on porous media theory, and its reliability is verified by model and field tests. The main results are as follows: the corresponding variation amplitudes of the train’s aerodynamic load coefficients are reduced by 36–95% when a PWB is set in the TBS; adopting the same design parameters along the full-length PWB on the TBTI is unreasonable; the PWB height and porosity in the TBS must be increased and reduced more than 33%, respectively, to achieve equivalent windproof performance. The conclusions in this paper can provide a preliminary idea for the optimization design of the PWB on the TBTI.
KW - aerodynamic coefficient
KW - Crosswind
KW - high-speed train (HST)
KW - porous wind barrier (PWB)
KW - tunnel–bridge section (TBS)
UR - http://www.scopus.com/inward/record.url?scp=85105620873&partnerID=8YFLogxK
U2 - 10.1080/19942060.2021.1918257
DO - 10.1080/19942060.2021.1918257
M3 - Journal article
AN - SCOPUS:85105620873
SN - 1994-2060
VL - 15
SP - 727
EP - 746
JO - Engineering Applications of Computational Fluid Mechanics
JF - Engineering Applications of Computational Fluid Mechanics
IS - 1
ER -