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Influence of variable cross-section on pressure transients and unsteady slipstream in a long tunnel when high-speed train passes through

列车通过变截面长大海底隧道时的隧道内瞬变压力和列车风研究

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Abstract

When constructing a long undersea tunnel, cross-sectional area of some parts of the tunnel will be changed to strengthen the tunnel or save construction costs, which will cause a change in aerodynamic characteristics of the tunnel. By comparing variable cross-section(VCS) tunnel and constant cross-section (CCS) tunnel, the influence of abrupt cross-section on pressure transients and slipstream in the long tunnel was studied. The RNG k-ε turbulence model was adopted for numerical simulation, which was validated by the moving model test. The results show that the closer it to the abrupt cross-section, the larger the difference between the positive peak pressure of the VCS tunnel and that of the CCS tunnel, reaching a maximum of 7.63% at 5.43 km. The difference in slipstream velocity in the longitudinal direction between the two tunnels can reach 18.7% at most, but it is almost the same in the other two directions. In addition, the impact of the abrupt section on slipstream in different areas of the tunnel is different. This research has an important reference value for parameter design of long variable cross-section tunnel and layout of auxiliary facilities in tunnel.

摘要

在建造长大海底隧道时, 为了加固隧道结构并节省成本, 通常会改变隧道部分区段的截面面 积, 这将导致隧道内的空气动力学特性发生变化。本文通过对比变截面(VCS)隧道和常规(CCS)隧道, 研究了突变截面对长隧道内压力瞬变和列车风的影响。数值模拟采用RNG k-ε 湍流模型, 通过动模型 试验进行了验证。结果表明, 越接近突变截面VCS隧道和CCS隧道内的正峰值压力之间的差异越大, 在5.43 km处达到最大值7.63%。在两种隧道之间纵向列车风的差异最高达18.7%, 但在其他两个方向 上几乎相同。此外, 突变截面对隧道不同区域的影响不相同。本研究对长大变截面隧道的参数设计和 隧道内附属设施的布置具有参考价值。

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Authors and Affiliations

  1. Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China

    Ru-dai Xue  (薛儒岱), Xiao-hui Xiong  (熊小慧), Kai-wen Wang  (王凯文), Xiao-bai Li  (李小白), Tian-yun Dong  (董天韵) & Jun-yan Wang  (王军彦)

  2. Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha, 410075, China

    Ru-dai Xue  (薛儒岱), Xiao-hui Xiong  (熊小慧), Kai-wen Wang  (王凯文), Xiao-bai Li  (李小白), Tian-yun Dong  (董天韵) & Jun-yan Wang  (王军彦)

  3. National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Central South University, Changsha, 410075, China

    Ru-dai Xue  (薛儒岱), Xiao-hui Xiong  (熊小慧), Kai-wen Wang  (王凯文), Xiao-bai Li  (李小白), Tian-yun Dong  (董天韵) & Jun-yan Wang  (王军彦)

  4. China Railway No. 4 Survey and Design Group Co., Ltd., Wuhan, 430000, China

    Qi-zhu Jiao  (焦齐柱)

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  1. Ru-dai Xue  (薛儒岱)
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Correspondence to Kai-wen Wang  (王凯文).

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Contributors

XUE Ru-dai edited the draft of the manuscript and provide the conceptualization and formal analysis. XIONG Xiao-hui provided supervision and funding acquisition and revised the manuscript. WANG Kai-wen conducted the literature review and edited the manuscript. JIAO Qi-zhu provided the funding acquisition. LI Xiao-bai edited the manuscript. DONG Tian-yun revised the manuscript. WANG Jun-yan revised the manuscript.

Foundation item

Project(2020YFA0710903) supported by the National Key R&D Program of China; Project(2021JJ30849) supported by the Natural Science Foundation of Hunan Province, China; Projects(2020zzts111, 2020zzts117) supported by the Graduate Student Independent Innovation Project of Central South University, China; Project(CX20200196) supported by the Graduate Student Independent Innovation Project of Hunan Province, China

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All the authors declare no conflict of interest.

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Xue, Rd., Xiong, Xh., Wang, Kw. et al. Influence of variable cross-section on pressure transients and unsteady slipstream in a long tunnel when high-speed train passes through. J. Cent. South Univ. 30, 1027–1046 (2023). https://doi.org/10.1007/s11771-023-5273-0

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