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
Influence of variable cross-section on pressure transients and unsteady slipstream in a long tunnel when high-speed train passes through
薛儒岱 1熊小慧 1王凯文 1焦齐柱 2李小白 1董天韵 1王军彦1
作者信息
- 1. Key Laboratory of Traffic Safety on Track of Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China;Joint International Research Laboratory of Key Technology for Rail Traffic Safety,Central South University,Changsha 410075,China;National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Central South University,Changsha 410075,China
- 2. China Railway No.4 Survey and Design Group Co.,Ltd.,Wuhan 430000,China
- 折叠
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.
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.
关键词
变截面/长大隧道/高速列车/压力瞬变/列车风Key words
variable cross-section/long tunnel/high-speed train/pressure transient/slipstream引用本文复制引用
基金项目
National Key R&D Program of China(2020YFA0710903)
Natural Science Foundation of Hunan Province,China(2021JJ30849)
Graduate Student Independent Innovation Project of Central South University,China(2020zzts111)
Graduate Student Independent Innovation Project of Central South University,China(2020zzts117)
Graduate Student Independent Innovation Project of Hunan Province,China(CX20200196)
出版年
2023
NETL
NSTL
维普
万方数据