摘要
高速列车进出隧道所诱发的空气动力学效应会给车辆、隧道结构安全及周围环境造成不利影响,为此,采用三维、非定常、可压缩雷诺时均方程和RNG k-ε双方程湍流模型,对新型变截面隧道和典型缓冲结构在气动效应缓解效果方面进行模拟对比,并辅以动模型试验验证。研究结果表明:变截面隧道对于车体表面和隧道洞壁的压力缓解效果比增设缓冲结构的等截面隧道更好,而对于洞口微气压波的缓解效果则不如缓冲结构的显著;断面扩大型缓冲结构隧道、断面扩大开孔型缓冲结构隧道、变截面隧道与等截面隧道相比,洞壁最大压力峰峰值分别减小2.0%,2.3%和7.6%,车体表面最大压力峰峰值分别减小3.2%,3.7%和9.3%。
The aerodynamic effects induced by high-speed trains entering and exiting tunnels adversely affect trains,tunnels and the environment.Based on the three-dimensional,unsteady,compressible Reynolds-averaged equation and RNG k-εequation turbulence model,the mitigation effects achieved by the novel tunnel with variable cross-section and typical tunnel hoods were comparatively analyzed and validated through a moving model test.The results show that the pressure-relief effect on train surface and tunnel wall for the tunnel with variable cross-section is better than those of typical hoods,while the effect on reducing the micro-pressure wave at tunnel exit is less significant than those of the latter ones.Compared with the uniform tunnel,the peak-to-peak pressures recorded on tunnel wall for the enlarged tunnel hood,enlarged tunnel hood with windows,and the tunnel with variable cross-section,are reduced by 2.0%,2.3%and 7.6%,respectively.Similarly,the peak-to-peak pressures recorded on train surface are reduced by 3.2%,3.7%,and 9.3%,respectively.
作者
李文辉
刘堂红
周苗苗
郭子健
夏玉涛
LI Wenhui;LIU Tanghong;ZHOU Miaomiao;GUO Zijian;XIA Yutao(Key Laboratory of Traffic Safety on the 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)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第5期1572-1581,共10页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51975591)。
关键词
高速列车
隧道空气动力学
隧道缓冲结构
变截面隧道
微气压波
high-speed train
tunnel aerodynamics
tunnel hood
tunnel with variable cross-section
micropressure wave
