Effects of simplifying train bogies on surrounding flow and aerodynamic forces

© 2019 Elsevier Ltd In this study, the numerical solution of a high-speed train with several simplified bogies is investigated. The time-averaged flow field around the train, the surface pressure, and the aerodynamic forces on the train are discussed. The results reveal that a simpler bogie structure can achieve a higher underbody flow velocity and change fluctuations beneath the train owing to the resulting turbulence level. The simplification of bogies has a smaller effect on the side slipstream velocity and pressure compare to which in underbody, and at 3 m away from the centre of the track, the simplified bogie with wheels and a simple side frame used in this study obtains similar results to cases wherein more complex bogies are used. The surface pressure under the train is affected by bogie simplification, especially in the bogie cabin end area, resulting in aerodynamic drag and lift variations. If underbody flow or aerodynamic drag and lift forces are the focus of study, then the geometry of the centre region of the bogie, i.e. its main structures features, should be maintained in simplified models.

Liang, XifengCentral South University (author)
Krajnovic, Sinisa,1970Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)sinisa (author)
Xiong, XiaohuiCentral South University (author)
Zhou, WeiCentral South University (author)
Central South UniversityChalmers tekniska högskola (creator_code:org_t)

In:Journal of Wind Engineering and Industrial Aerodynamics: Elsevier BV191, s. 170-1820167-6105

By the author/editor: Dong, Tianyun; Liang, Xifeng; Krajnovic, Sinis ...; Xiong, Xiaohui; Zhou, Wei

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Applied Mechanic ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Vehicle Engineer ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Fluid Mechanics ...

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