Wall heat flux analysis in a hypersonic turbulent boundary layer over a compression ramp
文献类型：期刊论文
| 作者 | Guo TB(郭同彪)3; He K(何康)1,3; Zhang, Ji1,3; Li, Xin2; Li XL(李新亮)1,3 |
| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 37期号:3页码:14 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0253317 |
| 通讯作者 | Li, Xinliang(lixl@imech.ac.cn) |
| 英文摘要 | The wall heat flux (WHF) in a hypersonic turbulent boundary layer over a 24 degrees compression ramp at Mach 6.0 is studied based on direct numerical simulation with the grid point number up to 3.5 billion and the Reynolds number based on momentum thickness of 8200. An apparent spanwise non-homogeneity of the mean WHF is observed on the compression ramp, caused by large-scale G & ouml;rtler-type streamwise vortices. The pre-multiplied spanwise energy spectra of the fluctuating WHF reveal two energetic spanwise length scales in the interaction region, which are associated with the elongated streaky structures and G & ouml;rtler-type vortices, respectively. The probability density functions of the fluctuating WHF in the interaction region are much more negatively skewed than that in the upstream flat-plat boundary layer, and the probability that the extremely high WHF occurs is significantly increased, both of which are found to be caused by the spanwise large-scale vortical structures via applying the low (high)-wavenumber-pass filter technique. The mean WHF in the interaction region is significantly increased, and two local maximum peaks are obtained. The upstream one lies just downstream of the reattachment position, arising from the significantly increased temperature peak value nearby and the strong downward motion that transports the relatively high-temperature fluid toward the wall. The other one is associated with the combined influence of the strong mean convection and turbulent mixing as well as the high viscous dissipation. The Reynolds analogy factor reveals an obvious variation in the interaction region, and its streamwise distribution downstream of the reattachment position is similar to the ratio of the total viscous dissipation and its component related to the wall-normal gradient of the streamwise velocity. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | DIRECT NUMERICAL-SIMULATION ; LARGE-EDDY SIMULATION ; FLOW |
| 资助项目 | National Natural Science Foundation of China10.13039/501100001809[12202457] ; National Natural Science Foundation of China10.13039/501100001809[12232018] ; National Natural Science Foundation of China10.13039/501100001809[12072349] ; NSFC[XDB0500301] ; Strategic Priority Research Program of the Chinese Academy of Science[2022M723232] ; China Postdoctoral Science Foundation |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001446500800026 |
| 资助机构 | National Natural Science Foundation of China10.13039/501100001809 ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Science ; China Postdoctoral Science Foundation |
| 其他责任者 | 李新亮 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/100700]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 2.Shanghai Electromech Engn Inst, Shanghai 201109, Peoples R China 3.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Guo TB,He K,Zhang, Ji,et al. Wall heat flux analysis in a hypersonic turbulent boundary layer over a compression ramp[J]. PHYSICS OF FLUIDS,2025,37(3):14. |
| APA | 郭同彪,何康,Zhang, Ji,Li, Xin,&李新亮.(2025).Wall heat flux analysis in a hypersonic turbulent boundary layer over a compression ramp.PHYSICS OF FLUIDS,37(3),14. |
| MLA | 郭同彪,et al."Wall heat flux analysis in a hypersonic turbulent boundary layer over a compression ramp".PHYSICS OF FLUIDS 37.3(2025):14. |
入库方式： OAI收割
来源：力学研究所
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