Wall pressure fluctuations in subsonic channel flows bounded by impedance walls
文献类型：期刊论文
| 作者 | Hu, YaSen; Wan, ZhenHua; Sun, DeJun; Lu, XiYun |
| 刊名 | PHYSICAL REVIEW FLUIDS
 |
| 出版日期 | 2025-07-15 |
| 卷号 | 10期号:7页码:15 |
| ISSN号 | 2469-990X |
| DOI | 10.1103/cq5r-lzp5 |
| 通讯作者 | Wan, Zhen-Hua(wanzh@ustc.edu.cn) ; Sun, De-Jun(dsun@ustc.edu.cn) |
| 英文摘要 | The low-noise commercial aircraft necessitates the meticulous design of acoustic liners within engine nacelles. Acoustic liners, due to their porous wall nature, can substantially affect near-wall turbulent structures, thereby inducing various propagating waves with regular wave number and frequency. In this study, direct numerical simulations (DNS) of channel flow bounded by solid and porous walls were conducted at bulk Mach numbers of Mb = 0.2, 0.5, and 0.8, where time-domain impedance boundary conditions (TDIBC) were employed to model the porous-wall effects. Longitudinal and oblique acoustic waves within the channel flow were accurately captured under porous wall constraints. The wavenumber-frequency relationships for all reflected waves and surface waves subjected to the specified TDIBC were theoretically developed, inspired by the work of Rienstra and 2004)]. The accuracy of these theoretical predictions was further validated through highfidelity DNS results. Compared to the solid wall, it has been observed that the porous wall induces a phase offset in waves reflected from impedance walls and the characteristic wavenumber-frequency relationship for surface acoustic waves has been confirmed by DNS. Furthermore, the wavenumber spectrum on the wall was explored, revealing the presence of supersonic ridges distributed along a series of concentric ellipses, but with modified wavenumber relationships. These features stem from the propagation characteristics of reflected waves within the channel flow. |
| 分类号 | 二类 |
| WOS关键词 | TURBULENT-FLOW ; NOISE ; REYNOLDS ; SCHEME ; MODEL |
| 资助项目 | National Natural Science Foundation of China[12322210] ; National Natural Science Foundation of China[92252202] ; National Natural Science Foundation of China[12172351] ; National Natural Science Foundation of China[12402317] ; National Natural Science Foundation of China[12388101] ; Postdoctoral Fellowship Program of CPSF[GZC20232550] ; China Postdoctoral Science Foundation[2024M753102] ; Fundamental Research Funds for the Central Universities[WK2090000073] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001552816900001 |
| 资助机构 | National Natural Science Foundation of China ; Postdoctoral Fellowship Program of CPSF ; China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities |
| 其他责任者 | Wan, Zhen-Hua ; Sun, De-Jun |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/103734]  |
| 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 | Univ Sci & Technol China, Sch Engn Sci, State Key Lab High Temp Gas Dynam, Hefei 230027, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, YaSen,Wan, ZhenHua,Sun, DeJun,et al. Wall pressure fluctuations in subsonic channel flows bounded by impedance walls[J]. PHYSICAL REVIEW FLUIDS,2025,10(7):15. |
| APA | Hu, YaSen,Wan, ZhenHua,Sun, DeJun,&Lu, XiYun.(2025).Wall pressure fluctuations in subsonic channel flows bounded by impedance walls.PHYSICAL REVIEW FLUIDS,10(7),15. |
| MLA | Hu, YaSen,et al."Wall pressure fluctuations in subsonic channel flows bounded by impedance walls".PHYSICAL REVIEW FLUIDS 10.7(2025):15. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。