Effect of surface roughness on the aerodynamics of a high-speed train subjected to crosswinds

doi:10.1007/s10409-021-01099-7

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Effect of surface roughness on the aerodynamics of a high-speed train subjected to crosswinds
	Wang MY(王梦莹)2,3; Hashmi, S. A.1; Sun ZX(孙振旭)2,3; Guo DL(郭迪龙)2,3; Vita, G.1; Yang GW(杨国伟)2,3; Hemida, H.1
刊名	ACTA MECHANICA SINICA
	2021-07-02
页码	14
关键词	High-speed train Surface roughness Crosswinds Aerodynamics Flow separation
ISSN号	0567-7718
DOI	10.1007/s10409-021-01099-7
通讯作者	Sun, Z. X.(sunzhenxu@imech.ac.cn)
英文摘要	The irregularities on trains bodies are normally ignored or greatly simplified in studies concerned with aerodynamics. However, surface roughness is known to affect the flow characteristics in the boundary layer near the wall, hence potentially influencing the aerodynamic performance of a train. This work investigates the effects of roughness on the overall aerodynamic characteristics of a high-speed train subjected to crosswinds. Both experimental work and numerical work have been conducted to simulate a typical high-speed train with a 90 degrees yaw angle, with both a smooth and rough surface. Roughness is applied to the roof of the train surface in the form of longitudinal strips. Results reveal that the addition of roughness is able to reduce the surface pressure on the roof and leeside of the train. Numerical results agree well with experimental ones and confirm that an increase in the roughness relative size can effectively restrain flow separation and reduce surface pressure. Moreover, numerical simulation results show that side force coefficient and roll moment coefficient subjected to rough model significantly decreased compared with smooth model. The conclusions drawn in this study offer the chance to derive critical reference values for the optimization of the aerodynamic characteristics of high-speed trains.
分类号	Q3
资助项目	China Scholarships Council ; Youth Innovation Promotion Association CAS[2019020] ; University of Birmingham (UK) ; EU H2020 project LiftTRAIN[701693]
WOS研究方向	Engineering ; Mechanics
语种	英语
WOS记录号	WOS:000669158300001
资助机构	China Scholarships Council ; Youth Innovation Promotion Association CAS ; University of Birmingham (UK) ; EU H2020 project LiftTRAIN
其他责任者	Sun, Z. X.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87025]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Univ Birmingham, Sch Civil Engn, Birmingham B15 2TT, England 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Wang MY,Hashmi, S. A.,Sun ZX,et al. Effect of surface roughness on the aerodynamics of a high-speed train subjected to crosswinds[J]. ACTA MECHANICA SINICA,2021:14.
APA	王梦莹.,Hashmi, S. A..,孙振旭.,郭迪龙.,Vita, G..,...&Hemida, H..(2021).Effect of surface roughness on the aerodynamics of a high-speed train subjected to crosswinds.ACTA MECHANICA SINICA,14.
MLA	王梦莹,et al."Effect of surface roughness on the aerodynamics of a high-speed train subjected to crosswinds".ACTA MECHANICA SINICA (2021):14.