Effect of surface roughness on the aerodynamics of a high-speed train subjected to crosswinds
文献类型：期刊论文
| 作者 | 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
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| 刊名 | ACTA MECHANICA SINICA
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| 出版日期 | 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. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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