中南大学学报（自然科学版）2018，Vol.49Issue(2)：493-501,9.DOI:10.11817/j.issn.1672-7207.2018.02.031
头部主型线变化对列车隧道交会气动性能的影响
Influence of head outlines on aerodynamic effect of two trains intersecting in tunnel
摘要
Abstract
Numerical simulation method based on the three-dimensional, compressible, unsteady N-S equations andk-εdouble-equation turbulence model was used to study the influence of head outlines on aerodynamic effect of two trains intersecting in a tunnel, and the changes of the side force, resistance force and pressure on tunnel wall were obtained. The results show that the pressure values obtained by the present numerical method are in good agreement with those of the model-scaled test and full-scale experiment, and their relative error is both less than 5％. The aerodynamic effect caused by the single-arched train is slightly better than that of the double-arched train. The outline of head longitudinal section has a large impact on the aerodynamic forces induced by two trains passing by each other in a tunnel. When it changes from concave to convex, the side force amplitude coefficients of head car, the middle car and tail car are increased by 11.2％, 14.0％ and 23.7％, respectively, and the maximum total resistance force coefficient is increased by 7.2％. When the outline of head horizontal section changes from the wide shape to the narrow shape, the side force amplitude coefficients of head car, the middle car and tail car are increased by 3.4％, 2.4％ and 4.6％, respectively, but the maximum total resistance force coefficient is reduced by 4.0％. The change of head outlines has little effect on the tunnel wall pressure variations, and the maximum difference is 1.7％.关键词
头部外形/高速列车/主型线/隧道/交会/气动性能Key words
head shape/high-speed train/outlines of head/tunnel/intersection/aerodynamic performance分类
交通工程引用本文复制引用
周细赛,刘堂红,陈争卫,陈晓栋,谢台中,李文辉..头部主型线变化对列车隧道交会气动性能的影响[J].中南大学学报（自然科学版）,2018,49(2):493-501,9.基金项目
国家自然科学基金资助项目(51575538,U1134203) （51575538,U1134203）
中南大学教师研究基金资助项目(2013JSJJ014)(Projects(51575538, U1134203) supported by the National Natural Science Foundation of China （2013JSJJ014）
Project(2013JSJJ014) supported by the Teachers Research Fund of Central South University) （2013JSJJ014）
