TY - JOUR
T1 - Impact of the trailing edge shape of a downstream dummy vehicle on train aerodynamics subjected to crosswind
AU - Huo, Xiaoshuai
AU - Liu, Tanghong
AU - Yu, Miao
AU - Chen, Zhengwei
AU - Guo, Zijian
AU - Li, Wenhui
AU - Wang, Tiantian
N1 - Funding Information:
The authors acknowledge the computing resources provided by the High-Speed Train Research Center of Central South University, China. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the National Key R&D Program of China (Grant No. 2017YFB1201304-17).
Publisher Copyright:
© IMechE 2020.
PY - 2021/2
Y1 - 2021/2
N2 - Wind tunnel tests for trains under large yaw angles are usually limited due to the width of the wind tunnel. Therefore, the leading car and a downstream dummy vehicle model are often employed instead of a real train, but there are no clear regulations regarding the shape of the end of the dummy vehicle. This paper studied the impact of the trailing edge shape of the downstream dummy vehicle on train aerodynamics subjected to crosswind based on the shear-stress-transport k-ω turbulence model of the delayed detached eddy simulation. Three types of end shapes, namely the rectangular end shape, the arc end shape, and the streamlined end shape were chosen for comparison, and the simulation results of the three-car-group train were selected as the benchmark. First, the reliability of the numerical method was validated by wind tunnel tests. Then, the aerodynamic coefficients under yaw angles of 0°–60° and the surface pressure distributions and flow structures around the train under the yaw angle of 60° of the head cars with different end shapes were compared and analyzed.
AB - Wind tunnel tests for trains under large yaw angles are usually limited due to the width of the wind tunnel. Therefore, the leading car and a downstream dummy vehicle model are often employed instead of a real train, but there are no clear regulations regarding the shape of the end of the dummy vehicle. This paper studied the impact of the trailing edge shape of the downstream dummy vehicle on train aerodynamics subjected to crosswind based on the shear-stress-transport k-ω turbulence model of the delayed detached eddy simulation. Three types of end shapes, namely the rectangular end shape, the arc end shape, and the streamlined end shape were chosen for comparison, and the simulation results of the three-car-group train were selected as the benchmark. First, the reliability of the numerical method was validated by wind tunnel tests. Then, the aerodynamic coefficients under yaw angles of 0°–60° and the surface pressure distributions and flow structures around the train under the yaw angle of 60° of the head cars with different end shapes were compared and analyzed.
KW - aerodynamic coefficient
KW - crosswind
KW - end shape
KW - flow structure
KW - One-and-a-half cars
KW - pressure distribution
UR - http://www.scopus.com/inward/record.url?scp=85084074756&partnerID=8YFLogxK
U2 - 10.1177/0954409720915039
DO - 10.1177/0954409720915039
M3 - Journal article
AN - SCOPUS:85084074756
SN - 0954-4097
VL - 235
SP - 201
EP - 214
JO - Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
JF - Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
IS - 2
ER -