| Effect of surface roughness on the aerodynamics of a high-speed train subjected to crosswinds | |
Wang MY(王梦莹)1,2; Hashmi, S. A.3; Sun ZX(孙振旭)1,2 ; Guo DL(郭迪龙)1,2; Vita, G.3; Yang GW(杨国伟)1,2; Hemida, H.3
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| Corresponding Author | Sun, Z. X.([email protected]) |
| Source Publication | ACTA MECHANICA SINICA
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| 2021-07-02 | |
| Pages | 14 |
| ISSN | 0567-7718 |
| Abstract | 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. |
| Keyword | High-speed train Surface roughness Crosswinds Aerodynamics Flow separation |
| DOI | 10.1007/s10409-021-01099-7 |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:000669158300001 |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Funding Project | China Scholarships Council ; Youth Innovation Promotion Association CAS[2019020] ; University of Birmingham (UK) ; EU H2020 project LiftTRAIN[701693] |
| Funding Organization | China Scholarships Council ; Youth Innovation Promotion Association CAS ; University of Birmingham (UK) ; EU H2020 project LiftTRAIN |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Sun, Z. X. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87026 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China; 3.Univ Birmingham, Sch Civil Engn, Birmingham B15 2TT, England |
| Recommended Citation 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.Rp_Au:Sun, Z. X. |
| 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. |
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| Jp2021F265.pdf（2683KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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