Analysis of high-speed train flow structures under crosswind

被引：9
|
作者：
Avadiar, Terence [1 ]
Bell, James [1 ]
Burton, David [1 ]
Cormaty, Heman [1 ]
Li, Chao [1 ]
机构：
[1] Monash Univ, Dept Mech & Aerosp Engn, Bldg 31, Clayton, Vic 3800, Australia
来源：
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2016年 / 30卷 / 09期
关键词：
Aerodynamics; Boundary layer; Crosswind; Flow structures; Flow visualization; High-speed train; Wind tunnel;
D O I：
10.1007/s12206-016-0810-5
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The flow structures along the length of a High-Speed Train (HST) are experimentally investigated under simulated crosswind conditions. The experiment uses flow visualizations and velocity measurements in a wind tunnel on a HST model at various angles of yaw. Surface visualizations shows the development of a longitudinal vortex, originating at the nose which travels along the leeward side of the train. A hypothesis is presented and tested proposing flow structures may repeat when the Boundary layer (BL) on the roof of the HST reaches maximum development or is "pushed off". A key motivation is to evaluate the validity of using shortened HST models in a wind tunnel to correctly represent full-length trains. Using this theory, a shortened train model appears unable to completely model full-scale HSTs at realistic yaw angles.
引用
收藏
页码：3985 / 3991
页数：7
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