Analysis of high-speed train flow structures under crosswind
- Resource Type
- Article
- Authors
- Terence Avadiar; James Bell; David Burton; Heman Cormaty; Chao Li
- Source
- Journal of Mechanical Science and Technology, 30(9), pp.3985-3991 Sep, 2016
- Subject
- 기계공학
- Language
- English
- ISSN
- 1976-3824
1738-494X
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.